Download - Sigma Marine Coatings

Amsterdamseweg 141422 AD UithoornTelefoon 0297-541911Telefax 0297-566331P.O. Box 421420 AA UithoornThe Netherlandse-mail [email protected]

Zoals we vorige keer al schreven, hebben we er sinds 26 maart 5 vijftigers bij. Hierbij enkele beelden:

Zoals we vorige keer al schreven, hebben we er sinds 26 maart 5 vijftigers bij. Hierbij enkele beelden:

A member of the SigmaKalon

Group of Companies

2000 February 2000

S I G M A C O AT I N G S

M A R I N E

MARINE COATINGSMANUAL

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Protecting the Future

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3003 SHIPS SHEET INDEX

a five page issue March 2000 revision of 5-1997

Sheet nrs. INFORMATION SHEETS

1410 Conversion tables 1411 Explanation to product data sheets 1412 Nomograph conversion from English units to metric units 1413 S.I. Units 1430 Safety indications 1431 Safety in confined spaces and health safety explosion hazard - toxic hazard 1432 Safety colours identification colours pipes 1433 Safe working in confined spaces 1434 Directives for ventilation practice 1490 Cleaning of steel and removal of rust 1491 Specification for mineral abrasives 1498 Hydrojetting 1650 Relative Humidity - substrate temperature - air temperature 1880 Welding certificates for prefabrication primers 1881 Health certificates for prefabrication primers 1882 Certificates for drinking water 1883 Certificates for low-flame spread 1883A Certificates for low-flame spread (Schwerentflambarkeit) (S.B.G.) 1884 Food certificates 1886 Recognized corrosion control coating (Lloyds register) 1891 Type approvals Sheet nrs. SYSTEM SHEETS

3003 Ships sheet index 3006 Paint system guide 3015 Prefabrication primers 3100 General aspects anticorrosive paints 3101 Anticorrosive systems for underwater and boottop to be overcoated

with antifoulings 3102 Systems for boottop and topside 3103 Systems for decks 3104 Systems for superstructure and deckfittings 3105 Systems for interior(s) 3106 Systems for ballast-, freshwater and polluted water tanks 3107 Systems for cargo holds 3108 Miscellaneous systems 3110 General aspects - antifoulings 3111 Sigmaplane HB antifouling systems 3113 Sigma Pilot Ecol antifouling systems 3114 Sigmaplane TA antifouling systems 3117 Sigmaplane HC antifouling system

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March 2000 Sheet nrs. SYSTEM SHEETS

3118 Sigmaplane TC antifouling system 3120 Sigmaplane Ecol antifouling systems 3121 Sigmaplane NC antifouling system 3122 Sigmaplane HA antifouling systems 3125 Sigma Alphagen 50 antifouling systems 3126 Sigma Alphagen 20 antifouling systems 3140 Heat resistant systems 3141 Hot water resistant systems 3310 Tankcoating selection table 3320 Sigmaguard EHB tankcoating system 3322 Sigma Phenguard tankcoating system 3323 Sigma Silguard MC tankcoating system 3325 Systems for drinking water tanks (+ cleaning procedure) 3328 Sigmaguard CSF 7462 tankcoating system Sheet nrs. PRODUCT DATA SHEETS

7102 Sigma Emaline 3000 7104 Sigma Balamastic 7110 Sigmarine Multiprimer 7111 Sigmarine Alu primer 7113 Sigmarine primer RL 7131 Sigmaferro primer ZP 7135 Sigmarine primer ZP 7150 Sigmacrylic primer 7171 Sigma Proferral MC 7177 Sigmaweld MC 7190 Sigmarine Holdbrite 7213 Sigmarine undercoat 7238 Sigmarine BTD 7240 Sigmarine Enamel 7250 Sigmacrylic finish 7260 Sigmarine Aluminium HR 7261 Sigmarine Aluminium HR 500 7263 Sigmarine Hold paint alu 7282 Sigmaplane TA antifouling 7284 Sigmaplane HB antifouling 7285 Sigma Pilot Ecol antifouling 7287 Sigmaplane HA antifouling 7288 Sigmaplane TC antifouling 7290 Sigmaplane NC antifouling 7292 Sigmaplane HC antifouling 7297 Sigmaplane Ecol antifouling

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March 2000 Sheet nrs. PRODUCT DATA SHEETS

7318 Sigmachlor primer 7343 Sigmavinyl primer 7346 Sigma Biguard primer 7347 Sigma Biguard coating 7350 Sigma Topacryl coating 7355 Sigma Topacryl finish 7371 Sigma Alphagen 10 antifouling 7372 Sigma Alphagen 20 antifouling 7375 Sigma Alphagen 50 antifouling 7400 Sigmaguard Tankshield primer 7409 Sigma Phenguard primer 7417 Sigma Universal primer 7424 Sigma Universal primer LT 7430 Sigma Multimastic 7433 Sigmaguard EHB 7435 Sigma Phenguard coating 7436 Sigma Phenguard finish 7443 Sigmaguard CSF 7448 Sigmaguard HS 7455 Sigmaguard Maintenance 7462 Sigmaguard CSF 7462 7465 Sigma CM miocoat 7466 Sigma CM coating 7467 Sigma Hullrite 7472 Sigma TCN 300 7473 Sigmaguard Tankshield coating 7479 Sigma TCN tiecoat 7483 Sigma TCN-LT 300 7524 Sigmadur HB finish 7528 Sigmadur gloss 7551 Sigma Silguard MC 7568 Sigma Silicate MC 7785 Sigmaguard CSF 85 (+ cleaning procedure) 7921 Sigmaguard BT primer PR 0616 7922 Sigma Multiguard primer 7925 Sigmaguard Tankshield LT-V primer 7951 Sigma Multiguard 7952 Sigma Glassflake 7953 Sigmaguard BT TP 1095 7954 Sigmaguard CSF Glassflake 7958 Sigmaguard Tankshield LT-V coating 8103 Sigmavar gloss 8215 Sigmatex

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ALPHABETICAL

7371 Sigma Alphagen 10 antifouling 7372 Sigma Alphagen 20 antifouling 7375 Sigma Alphagen 50 antifouling 7104 Sigma Balamastic 7347 Sigma Biguard coating 7346 Sigma Biguard primer 7466 Sigma CM coating 7465 Sigma CM miocoat 7102 Sigma Emaline 3000 7952 Sigma Glassflake 7467 Sigma Hullrite 7951 Sigma Multiguard 7922 Sigma Multiguard primer 7430 Sigma Multimastic 7435 Sigma Phenguard coating 7436 Sigma Phenguard finish 7409 Sigma Phenguard primer 7285 Sigma Pilot Ecol antifouling 7171 Sigma Proferral MC 7551 Sigma Silguard MC 7568 Sigma Silicate MC 7479 Sigma TCN tiecoat 7472 Sigma TCN 300 7483 Sigma TCN-LT 300 7350 Sigma Topacryl coating 7355 Sigma Topacryl finish 7417 Sigma Universal primer 7424 Sigma Universal primer LT 7318 Sigmachlor primer 7150 Sigmacrylic primer 7250 Sigmacrylic finish 7524 Sigmadur HB finish 7528 Sigmadur gloss 7131 Sigmaferro primer ZP 7953 Sigmaguard BT TP 1095 7921 Sigmaguard BT primer PR 0616 7443 Sigmaguard CSF 7954 Sigmaguard CSF Glassflake 7462 Sigmaguard CSF 7462 7785 Sigmaguard CSF 85 7433 Sigmaguard EHB 7448 Sigmaguard HS

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ALPHABETICAL

7455 Sigmaguard Maintenance 7958 Sigmaguard Tankshield LT-V coating 7925 Sigmaguard Tankshield LT-V primer 7473 Sigmaguard Tankshield coating 7400 Sigmaguard Tankshield primer 7297 Sigmaplane Ecol antifouling 7287 Sigmaplane HA antifouling 7284 Sigmaplane HB antifouling 7292 Sigmaplane HC antifouling 7290 Sigmaplane NC antifouling 7282 Sigmaplane TA antifouling 7288 Sigmaplane TC antifouling 7111 Sigmarine Alu primer 7260 Sigmarine Aluminium HR 7261 Sigmarine Aluminium HR 500 7238 Sigmarine BTD 7240 Sigmarine Enamel 7263 Sigmarine Hold paint alu 7190 Sigmarine Holdbrite 7110 Sigmarine Multiprimer 7113 Sigmarine primer RL 7135 Sigmarine primer ZP 7213 Sigmarine undercoat 8215 Sigmatex 8103 Sigmavar gloss 7343 Sigmavinyl primer 7177 Sigmaweld MC

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3006 PAINT SYSTEM GUIDE

a six page issue December 1999 revision of 5-1997

This guide indicates which Sigma systems may be used for the protection of the various parts of a vessel. Sheet numbers in the 3000 range refer to the system data sheets which are found in the green coloured section of the Sigma Marine Manual. The various paint specifications as mentioned on a system data sheet are indicated by the figures 1 up to 8. These specification numbers refer to paint systems that can be used for those parts of a vessel being mentioned in this guide.

SPECIFICATION NUMBERS FOR:

TYPE OF SYSTEM conven- chlori- vinyl tar epoxy poly- chlori- sili- COATING SHEET tional nated tar epoxy ure- nated cates FOR NUMBER rubber thane rubber/ modif. acrylic

SPEC. SPEC. SPEC. SPEC. SPEC. SPEC. SPEC. SPEC.

BOTTOM AND BOOTTOP anticorrosive system 3101 8 7 6 1 2,3,4,5 from keel to d.l.l., rudder and sea inlet boxes

antifouling system 3111 1,2 1,2 1,2 1,2 3113 1,2 1,2 1,2 1,2 1,2 3114 1,2,3 1,2,3 1,2 1,2 3117 1,2 1,2 1,2 1,2 3118 1,2,3 1,2,3 1,2 1,2 3120 1,2,3 1,2,3 1,2,3 1,2,3 3121 1 1 1 1 3122 1,2 1,2 1,2 1,2 3125 1,2 1,2 1,2 1,2 3126 1,2 1,2 1,2 1,2 TOPSIDE AND BOOTTOP from l.l.l. to top of 3102 6 1,2,3,4 1,2,3 5 bulkwarks, forecastle and poop sides including hawsepipes

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December 1999




WEATHER DECKS exposed steel decks 3103 4 2,3 2,3 5 1 and house tops

under deck planking 3108 1 SUPERSTRUCTURE EXTERIORS exposed accommo- 3104 2 1 1 3,4 dation, deck and mast houses, forecastle and poop bulkheads, hatch covers and coamings, bulwarks (inside), masts, derrick posts and derricks (outside), funnel (outside) DECK FITTINGS windlass and 3104 2 1 1 3,4 winches, bollards and fairleads, ladders and catwalk, davits, piping, ventilators, engine room skylight etc., inside masts and derrick posts, seatings and trunking

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December 1999




LIFE BOATS aluminium parts 3108 4 4

steel parts 3103 4 2,3 2,3 5

wooden parts 3103 4 3108 3 ANCHORS, CHAINS, 3108 1 CHAINLOCKERS MACHINERY SPACES AND PUMP ROOMS exposed steel in dry 3105 1 1 and wet spaces above floor level

steel behind linings 3108 1 2 and insulation

asbestos insulation 3105 4 ACCOMMODATION AND STORES exposed steel in dry spaces 3105 2 1 1 3 wet spaces 3105 1 1 3

steel behind linings 3108 1 2 and insulation

battery locker 3104 3

woodwork 3105 2 1 1 3108 3

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December 1999




CARGO HOLDS AND VOID SPACES dry cargo hold and 3107 5 1,2,3,4 access trunks

abrasive bulk cargo 3107 1,2 (coal, ore, scrap etc.)

bulk foodstuffs 3107 1,2,3,4 (grain, dry foods, sugar etc.)

chemical bulk cargo 3107 1,2 (cement, fertilizer, sulphur etc.)

void spaces, 3108 1 2 cofferdams, duct keel

refrig. holds, steel 3108 4 4 wood 3105 2 1 1

floodable hold 3106 4 3107 1,2,3,4 DOUBLE BOTTOM 3106 4 1,2,3 TANKS ballast water and 3106 4 1,2,3 fresh water

polluted water 3106 6,7

hot water 3141 1

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December 1999




drinking water 3325 1

animal-, fish-, and 3320 1 vegetable oils 3322 1 3323 1 3328 1

chemicals 3320 1 3322 1 3328 1

extended white 3320 1 products 3323 1 3328 1

white aliphatic 3320 1 products 3323 1 3328 1

solvents 3322 1 3323 1

wine 3322 1

bilges, drain wells 3106 4 1,2,3 GALVANIZED STEEL AND NON FERROUS METALS superstructure, 3108 4 4 mast, hand rail, ladder, stanchion, etc.

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December 1999




WOODWORK furniture, door, 3103 4 hand rail and 3108 3 wooden deck, etc. HEAT RESISTANT 3140 1,3 2 SYSTEMS

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* The chromium content of these primers may be detrimental to the health of operatives and Sigma Coatings has therefore discontinued the use of these products.

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3015 PREFABRICATION PRIMERS

a four page issue November 1999 revision of 5-1997

GENERIC TYPES

The most commonly encountered prefabrication primers are: Reinforced polyvinyl butyral (PVB) prefabrication primers.*

These have satisfactory application, welding and handling properties, but have a lower anticorrosive performance, especially as part of a system for immersed areas in conjunction with cathodic protection.

Zinc epoxy prefabrication primers. These have good anticorrosive properties and acceptable cutting and welding properties.

Red oxide epoxy prefabrication primers. These have good weatherability, reasonable cutting and welding properties, but show a moderate thermal stability and poor resistance to seawater exposure with cathodic protection.

Zinc silicate prefabrication primers. (Sigma Proferral MC) These have excellent heat resistance and weatherability and acceptable cutting and welding properties.

Reduced zinc silicate prefabrication primers. (Sigmaweld MC) These have excellent cutting and welding properties, especially in MIG/MAG welding techniques, excellent heat resistance and good weatherability.

WELDING

The welding techniques generally used, are: Manual Metal Arc welding (MMA) Gravity welding Submerged Arc welding (SAW) Metal Inert Gas / Metal Active Gas welding (MIG/MAG) It is known that automatic welding confers considerable economic advantages to construction yards and the MIG/MAG technique in particular has become economically attractive because it can also be used on thin plate without too much distortion. These welding techniques are characterized by the following properties.

MMA Gravity Welding SAW MIG/MAG

Welding position all horizontal horizontal all Automatisation minor yes common yes Deposition rate low high high medium Heat distortion medium high high low Cost indication high medium low medium

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November 1999 The weldability of a prefabrication primer is generally described by the tendency of the primer to produce little or no porosity in a weld. During welding, the type of primer will influence spatter formation, especially in case of MIG/MAG welding.

Generic type MMA/gravity Prefabrication primer all positions

MIG/MAG SAW

1G 2F 3F 1G 2F

Red oxide epoxy + (P) P P (P) P

Epoxy-zinc + + (P) P P P

Zinc silicate + + + Sigma Proferral MC (S, P) S, P (P)

reduced zinc silicate + + + + + + Sigmaweld MC

1G = Butt welding 2F = Horizontal (automatic) welding of T-joint 3F = Vertical downward welding of T-joints

P = Porosity S = Spatter + = Excellent = Possible defects, between brackets the type of defect = Defects

THERMAL STABILITY

The thermal stability of a prefabrication primer depends on its composition. Because of its inorganic nature, the behaviour of silicate primers is, in this respect, excellent. During cutting and welding, silicate primers, like Sigmaweld MC and Sigma Proferral MC, can withstand temperatures up to 1000C for short periods. This high level of thermal stability has several practical advantages

cutting and welding damage is minimised fumes created by hot work procedures will be reduced the amount of weld spatter will be reduced weld spatter will not adhere to the primed steel By comparison organic prefabrication primers can only resist temperatures up to 500C for short periods.

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November 1999

HEALTH AND SAFETY

Fumes are inevitably generated during welding and cutting due to combustion of primer material. The amount and composition of such fumes depends on the raw materials from which the prefabrication primer has been made. Fume extracting equipment should be used in case primed steel has to be welded or cut in confined spaces. All Sigma Coatings prefabrication primers are checked by the North of England Industrial Health Service and fulfil Occupational Exposure Limits requirements (see information sheet Health certificates for prefabrication primers 1881).

WEATHERABILITY

The weatherability of a primer is a function of the quality of surface preparation, film thickness applied, type of environment to which the plates and/or sections are stored and degree of damage to which they are subjected during this period. In general zinc dust primers will perform better during atmospheric exposure than primers formulated with a minimum amount of zinc or containing no zinc at all. Primers with a high zinc content can therefore be applied at lower dry film thicknesses. General indication of weathering properties of Sigma Coatings prefabrication primers:

dft average weathering period

Sigmaweld MC 22 m 6 months Sigma Proferral MC 15 m 9 months

SECONDARY SURFACE PREPARATION

In order to ensure satisfactory adhesion of the subsequently applied system, prefabrication primed sections have to undergo some degree of secondary surface preparation prior to system application. The degree and type of secondary surface preparation required before application of the full coating system depends on:

the resistance to exterior exposure of the prefabrication primer the service conditions of the subsequently applied system the prevailing shop regulations At the very least, this involves removal of dirt, dust and debris; but other problems will be associated with handling damage, weldseams, burn damage or excessively weathered plate. Generally, weldseam areas and corroded or burned areas will require thorough blast cleaning or mechanical cleaning. Zinc salts should be removed by sweepblasting or by abrading mechanically using silicon carbide impregnated abrasive pads (SCAP).

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November 1999 A total lack of surface preparation, an insufficient degree thereof or an inappropriate service situation can all lead to rather serious consequences for the coating system on heat affected zones, weldseam areas and contaminated, corroded or damaged areas.

RECOATABILITY

Beside the function to protect shot blast cleaned steel during storage and construction, a prefabrication primer is often also the first coat of anticorrosive paint systems. Proper organisation of all shop activities, taking into consideration all specific properties of the prefabrication primer involved, will lead to the avoidance of extensive surface preparation before overcoating. Epoxy prefabrication primers in sound condition may be used in coating systems which are resistant to

seawater exposure without cathodic protection. In practice, however, these kinds of prefabrication primers are often heavily damaged by heat or mechanical influences. This means that extra attention should be paid to the pretreatment of these damaged areas when the steel structure has to be exposed to immersion in (sea) water. Experience shows that blast cleaning to ISO-Sa2 is the most effective pretreatment method for these areas and exposure conditions.

Zinc containing prefabrication primers may show the formation of zinc salts during weathering, depending

on exposure conditions and time. The formation of zinc salts can be avoided by overcoating the prefabrication primer before the structure leaves the shop. If this is not possible, a second surface preparation should take place especially after long weathering periods.

The presence of a prefabrication primer in tankcoating systems is generally not accepted because the

chemical resistance of the tankcoating system will be diminished. REFERENCES

Sigma Proferral MC see product data sheet 7171 Sigmaweld MC see product data sheet 7177 Quality control for prefabrication primer application see information sheet 1701

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SHIPS

3100 GENERAL ASPECTS ANTICORROSIVE PAINTS

a three page issue December 1999 revision of 5-1997

INTRODUCTION

The importance of anticorrosive underwater hull coatings systems is not restricted to the avoidance of steel loss only. The coating system is also responsible for smooth hulls by preventing the development of roughness due to corrosion and/or fouling. Smooth hulls have a direct bearing on fuel consumption and other economic factors in the operation of a vessel. Antifouling performance and service time is highly dependent upon the performance of the anticorrosive system. Bare steel exposed by broken blisters and/or flaking will foul while the presence of these defects will obviously increase surface roughness. Therefore, it is true to say THE ANTIFOULING IS ONLY AS GOOD AS THE ANTICORROSIVE UNDERNEATH. SURFACE PRETREATMENT

Correct steel preparation is of the utmost importance to the performance and service lifetime of an anticorrosive hull system. Presence of rust will always cause defects of the coating system when immersed in water. The shop primer type and condition of the shop primed steel, particularly the degree of corrosion and the breakdown of the shop primer, will determine the performance of the system. An approved shop primer (zinc silicate) is the best and here good performance will be obtained by the appropriate/described cleaning methodes. The presence of shop primer other than a zinc silicate may require complete removal by abrasive blasting in order to ensure good performance. PAINT SELECTION

Most bottom systems used are of the bituminous, chlorinated rubber, vinyl or epoxy type. In the light of modern advanced coating technology the bituminous paints have become less important. Their performance and recoatability with new classes of antifoulings is no longer up to the standard acceptable in the present day. Bituminous, chlorinated rubber, and vinyltar coatings are physically drying types and for proper drying, reasonable temperatures as well as ventilation and air movement are necessary. Although temperatures as low as -10C are possible, at excessively low temperatures combined with short drying times and/or high dfts these coatings tend to retain solvents which can result in blistering and early breakdown of the coating system. While the introduction of tar in epoxy coatings gives a cost saving, this is not the most important feature since the tar, as an essential part of the binder improves the water resistance. It's good wetting properties not only provide good adhesion but also increase the tolerance to marginal surface pretreatment. However, there is now a trend away from the use of tar and tar containing products as tar is fast becoming environmentally unacceptable with straight epoxies and modified epoxies are increasingly being used. Without tar it is possible to increase specific properties of straight and modified epoxies such as abrasion and impact resistance thus significantly improving performance, particularly in specialist areas.

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December 1999 Epoxies are chemically reacting coatings, they need polyamide or polyamine hardeners to effect cure. To obtain the properties as indicated by the paint manufacturer, epoxy coatings require a certain temperature to cure. Highly advanced epoxies need temperatures around 5C to obtain adequate curing rate and to reach final cure, although application can be carried out down to 5C. To overcome the difficulties of application and curing at low temperatures special low temperature versions of various epoxy products are available. The straight and modified epoxies are usually of the high solid type and contain less solvents and will meet the latest regulations regarding volatile organic compounds (voc). The advantage of high solid coatings is expressed by their comparatively lower price per square metre compared to low solid materials when applied at the same dry film thickness. PERFORMANCE

The performance as well as the practical service of any anticorrosive system is directly related to the dry film thickness applied. It is therefore not economical, to choose critical low dry film thicknesses, since costs of application constitute a substantial part of the total investment in the coating operation. However application of excessively high film thicknesses of solvent containing paints, particularly in single coat application is also not advisable as it can lead to solvent retention and subsequent coating failure and should therefore also be avoided. The generic type of coating binder will also influence the actual service lifetime of the underwater hull systems. This refers to principal properties such as degree of (sea)water absorption and to the resistance to the cathodic protection system. When in these respects the various coatings are evaluated, epoxies give the best results followed by vinyl tar and chlorinated rubber coatings. The term service lifetime of coating systems requires some clarification: service lifetime has been defined as period of time until first maintenance painting is necessary. This is indicated by the condition of the coating system before reaching rust grade or blistering grade representing approximately 3% breakdown of the coating film. CATHODIC PROTECTION

With normal and correctly controlled cathodic protection, all coating types will perform well but with overprotection differences will be evident and early breakdown of the coating system especially at low film thickness areas can occur. It is for this reason that it is recommended to apply protective shields around the anodes of impressed current systems. Sacrificial zinc anodes produce potential differences related to the Ag/AgCl electrode of approx. minus 1050 mV. As the resistance of bituminous aluminium coating and chlorinated rubber coating lie in the region of this figure it is therefore recommended to apply a protective shield around the anodes when a vessel with these coating systems is fitted with zinc anodes. For this purpose a heavy coat of coaltar epoxy coating at approx 300-400 microns dft can be used as a protective shield.

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December 1999 PRINCIPAL AREAS OF PROTECTION

From this introduction and the general aspects of protection of ships it becomes clear that a number of areas can be distinguished with various degrees of corrosion severity. The most important areas are:

Underwater and boottop Boottop and topside Decks Superstructure and deckfittings Interior Ballast and freshwater tanks Cargoholds REFERENCES

Anticorrosive systems for underwater and boottop to be finished with antifoulings see system sheet 3101 Systems for boottop and topside see system sheet 3102 Systems for decks see system sheet 3103 Systems for superstructure and deckfittings see system sheet 3104 Systems for interior(s) see system sheet 3105 Systems for ballast and freshwater tanks see system sheet 3106 Systems for cargoholds see system sheet 3107 Miscellaneous systems see system sheet 3108

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3101 ANTICORROSIVE SYSTEMS FOR UNDERWATER AND BOOTTOP - TO BE OVERCOATED WITH ANTIFOULINGS

a six page issue revision of 5-1997

Contains following specifications:

Specification 1: coaltar epoxy coating system Specification 2: high solid tar free epoxy coating system Specification 3: high solid tar free epoxy coating system Specification 4: high solid epoxy mastic coating system Specification 5: high solid glassflake reinforced epoxy coating system Specification 6: vinyl tar coating system Specification 7: chlorinated rubber coating system Specification 8: bituminous aluminium coating system SURFACE PRETREATMENT

The quality of the surface pretreatment affects the performance of underwater and boottop systems, particularly when cathodic protection is applied. Best results will only be obtained on substrates blast cleaned to ISO-Sa2 which means that the shop primer should be removed. This is particularly important when (underfilm) corrosion has already started. Also the right blasting profile will be obtained. ACCEPTANCE OF SHOP PRIMER

The quality and generic type of shop primer, will determine the performance of the coating system. The types of shop primer acceptable, are those which are approved by Sigma Coatings and equivalent to the following products: Sigma Proferral MC and Sigmaweld MC - zinc silicate. In addition, any degradation or underfilm corrosion of the shop primer will limit the performance of the total system, unless correctly treated. These remarks are of particular importance when cathodic protection is installed.

The general condition of the weathered shop primer may vary widely throughout the structure and in many instances it is difficult to assess the severity of breakdown. Experience shows that in practice reblasting of corroded shop primed steel to ISO-Sa2 is the most satisfactory method of correcting corrosion defects and eliminating the detrimental effect of surface contamination.

Approved shop primers in good condition should be cleaned to remove contamination and/or zinc salts. If necessary sweep blasting according to SPSS/Ss or mechanical cleaning according to SPSS-Pt3 should be carried out. Special attention should be paid to heat damaged areas, including areas alongside weldseams and backburns.

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November 1999

SPECIFICATION 1 coaltar epoxy system for UNDERWATER and BOOTTOP with good resistance to mechanical impact, abrasion and well designed cathodic protection

pretreatment steel; blast cleaned to ISO-Sa2 steel with approved zinc silicate shop primer; sweep blasted to SPSS-Ss, weld seams, burned and rusty areas blast cleaned to ISO-Sa2 or powertool cleaned to SPSS-Pt3 |f a holding primer is required Sigma Universal primer can be used (dft of 50 m) steel; hydrojetted to VIS WJ2 L (for more info see sheet 1498)

paint system Sigma TCN 300 brown 125 m Sigma TCN tiecoat 125 m antifouling as specified

maintenance should preferably be carried out to this specification

SPECIFICATION 2 high solid tar free epoxy system for UNDERWATER and BOOTTOP with good resistance to mechanical impact, abrasion and well designed cathodic protection

pretreatment steel; blast cleaned to ISO-Sa2 steel with approved zinc silicate shop primer; sweep blasted to SPSS-Ss, weld seams, burned and rusty areas blast cleaned to ISO-Sa2 or powertool cleaned to SPSS-Pt3 steel; hydrojetted to VIS WJ2 L (for more info see sheet 1498)

paint system Sigma Multiguard primer 125 m Sigma Hullrite 125 m


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November 1999

SPECIFICATION 3 high solid tar free epoxy system for UNDERWATER and BOOTTOP with excellent resistance to mechanical impact, abrasion and well designed cathodic protection

pretreatment steel; blast cleaned to ISO-Sa2 steel with approved zinc silicate shop primer; sweep blasted to SPSS-Ss, weld seams, burned and rusty areas blast cleaned to ISO-Sa2 or powertool cleaned to SPSS-Pt3 steel; hydrojetted to VIS WJ2 L (for more info see sheet 1498)

paint system Sigma Multiguard primer 100 m Sigma Multiguard 150 m Sigma Hullrite 75 m antifouling as specified


note If a holding primer is required, Sigma Multiguard primer can be replaced by Sigma Universal primer at 50 m, followed by Sigma Multiguard in a dft of 200 m

SPECIFICATION 4 high solid, epoxy mastic coating system for maintenance of UNDERWATER and BOOTTOP with good resistance to mechanical impact and well designed cathodic protection

pretreatment steel; blast cleaned to ISO-Sa2, blasting profile (Rz) 40-70 m steel with approved zinc silicate shop primer; sweep blasted to SPSS-Ss, or powertool cleaned to SPSS-Pt3 for maintenance abrasive blasting to ISO-Sa2 or hydrojetted to VIS WJ2 L (for more info see sheet 1498)

paint system Sigma Multimastic aluminium 125 m Sigma Hullrite 125 m

maintenance should preferably be carried according to this specification

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November 1999

SPECIFICATION 5 high solid, glassflake reinforced epoxy system on top of in situ applied epoxy primer for UNDERWATER and BOOTTOP with good resistance to heavy impact (fender areas - ice going vessels) and well designed cathodic protection

pretreatment steel; blast cleaned to ISO-Sa2, blasting profile (Rz) 50-100 m

paint system Sigma Multiguard primer 100 m Sigma Glassflake 400 m Sigma Hullrite 75 m antifouling as specified

maintenance should preferably be carried out to the original specification

note if a holding primer is required, Sigma Multiguard primer can be replaced by Sigma Universal primer in a dft of 50 m

SPECIFICATION 6 vinyl tar system for UNDERWATER and BOOTTOP with good resistance to well designed cathodic protection

pretreatment steel; blast cleaned to ISO-Sa2 steel with approved zinc silicate shop primer; sweep blasted to SPSS-Ss, weld seams, burned and rusty areas blast cleaned to ISO-Sa2 or powertool cleaned to SPSS-Pt3

paint system Sigmavinyl primer light 75 m Sigmavinyl primer dark 75 m Sigmavinyl primer light 75 m antifouling as specified

maintenance should be carried out with Sigmavinyl primer

SPECIFICATION 7 chlorinated rubber system on top of an in situ applied epoxy primer for UNDERWATER and BOOTTOP with good resistance to well designed cathodic protection


paint system Sigmachlor primer light 75 m Sigmachlor primer dark 75 m Sigmachlor primer light 75 m antifouling as specified

maintenance should be carried out with Sigmachlor primer

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November 1999

SPECIFICATION 8 bituminous aluminium system suitable for UNDERWATER and BOOTTOP with fair resistance to well designed cathodic protection


paint system Sigmarine alu primer light 75 m Sigmarine alu primer dark 75 m antifouling as specified

maintenance should be carried out with Sigmarine alu primer

MAINTENANCE

As in normal docking practice, fouling, loose paint and other contaminants should be removed by high pressure water cleaning (HPWC). Any fouling and/or loose paint remaining after HPWC must be removed by scraping or sweep blasting. The removal of an oil or grease belt can be achieved by scraping heavy deposits from the surface followed by HPWC in combination with the use of suitable detergents. This should be followed by a thorough fresh water wash and drying prior to blasting and/or repainting. It might, however, be necessary to blast clean such areas after this operation when oil has penetrated the underlying paint systems. Rusty spots should be pretreated by blast cleaning and touched up with the original anticorrosive system within the requirements given in the relevant specifications. CATHODIC PROTECTION

Sacrificial zinc anodes produce potential differences related to the Ag/AgCl electrode of approx. minus 1050 mV. As the resistance of bituminous aluminium coating and chlorinated rubber coating lie in the region of this figure it is therefore recommended to apply a protective shield around the anodes when a vessel with a these coating systems is fitted with zinc anodes. For this purpose a heavy coat of coaltar epoxy coating at approx. 300-400 microns dft can be used as a protective shield.

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November 1999 REFERENCES

Sigma Glassflake see product data sheet 7952 Sigma Hullrite see product data sheet 7467 Sigma Multiguard see product data sheet 7951 Sigma Multiguard primer see product data sheet 7922 Sigma Multimastic see product data sheet 7430 Sigma Proferral MC see product data sheet 7171 Sigma TCN tiecoat see product data sheet 7479 Sigma TCN 300 see product data sheet 7472 Sigma Universal primer see product data sheet 7417 Sigmachlor primer see product data sheet 7318 Sigmarine alu primer see product data sheet 7111 Sigmavinyl primer see product data sheet 7343 Sigmaweld MC see product data sheet 7177 Cleaning of steel and removal of rust see information sheet 1490 Hydrojetting see information sheet 1498 Prefabrication primers see system sheet 3015

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3102 SYSTEMS FOR BOOTTOP AND TOPSIDE

a five page issue December 1999 revision of 5-1997


Specification 1: high solid epoxy coating linked with 3101-spec. 1, 2 or 3 Specification 2: recoatable epoxy coating system linked with 3101-spec. 1, 2 or 3 Specification 3: high solid epoxy mastic coating system linked with 3101-spec. 1, 2, 3 or 4 Specification 4: glassflake epoxy coating system linked with 3101-spec. 1, 2, 3 or 5 Specification 5: chlorinated rubber/modified acrylic coating system linked with 3101-spec. 6 or 7 Specification 6: bituminous aluminium/alkyd coating system linked with 3101-spec. 8 SURFACE PRETREATMENT

The quality of the surface pretreatment affects the performance of boottop and topside systems, particularly when for the boottop area cathodic protection is applied. Best results are only obtained on substrates blast cleaned to ISO-Sa2, which means that up to the deep loadline the shop primer should be removed. This is particularly important when (underfilm) corrosion has already started. Also the right blasting profile will be obtained. ACCEPTANCE OF SHOP PRIMER

The quality and generic type of shop primer, will determine the performance of the coating system. The types of shop primer acceptable, are those which are equivalent to the Sigma qualities: Sigma Proferral MC and Sigmaweld MC - zinc silicate. In addition, the condition of the shop primer with regard to degradation and underfilm corrosion will determine the performance of the total system. These remarks are of particular importance when cathodic protection is installed. The general condition of the weathered shop primer may vary widely throughout the structure and in many instances it is difficult to assess the severity of breakdown. Experience shows that reblasting of corroded shop primed steel to ISO-Sa2 is the most satisfactory method of correcting corrosion defects and eliminating the detrimental effect of surface contamination. Approved shop primers in good condition should be cleaned to remove contamination and/or zinc salts. If necessary sweep blasting according to SPSS-Ss or mechanical cleaning according to SPSS-Pt3 should be carried out. Special attention should be taken for heat damaged areas, including areas alongside weldseams and backburns.

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December 1999

SPECIFICATION 1 high solid epoxy system for BOOTTOP and TOPSIDE with excellent resistance to mechanical impact, and abrasion system linked with 3101-spec. 1, 2 or 3

pretreatment steel; blast cleaned to ISO-Sa2 steel with approved zinc silicate shop primer; sweep blasted to SPSS-Ss, or power tool cleaned to SPSS-Pt3 steel; hydrojetted to VIS WJ2/3 L (for more info see sheet 1498)

paint system Sigma Multiguard primer 100 m Sigma Multiguard 150 m Sigma CM coating 75 m

notes if gloss is required, an extra coat of Sigmadur gloss (dft of 50 m) should be applied if a holding primer is required, Sigma Multiguard primer can be replaced by Sigma Universal primer in a dft of 50 m followed by Sigma Multiguard in a dft of 200 m


SPECIFICATION 2 recoatable epoxy system for BOOTTOP and TOPSIDE with good resistance to mechanical impact and abrasion system linked with 3101-spec. 1, 2 or 3

pretreatment steel; blast cleaned to ISO-Sa2 steel with approved zinc silicate shop primer; sweep blasted to SPSS-Ss or powertool cleaned to SPSS-Pt3 steel; hydrojetted to VIS WJ2/3 L (for more info see sheet 1498)

paint system Sigma Universal primer 50 m Sigma CM miocoat 100 m Sigma CM coating 100 m

note if gloss is required, an extra coat of Sigmadur gloss (dft of 50 m) should be applied

maintenance should preferably be carried out to this specification both Sigma CM miocoat and Sigma CM coating have good overcoating and good curing characteristics also below 0C, which simplifies maintenance

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December 1999

SPECIFICATION 3 high solid, epoxy mastic coating system for maintenance of BOOTTOP and TOPSIDE with good resistance to mechanical impact

pretreatment steel; blast cleaned to ISO-Sa2, blasting profile (Rz) 40-70 m steel with approved zinc silicate shop primer; sweep blasted to SPSS-Ss, or powertool cleaned to SPSS-Pt3 for maintenance abrasive blasting to ISO-Sa2 or hydrojetted to VIS WJ2 L (for more info see sheet 1498)

paint system Sigma Multimastic aluminium 125 m Sigma Multimastic 125 m

note if gloss is required, an extra coat of Sigmadur gloss (dft of 50 m) should be applied

maintenance should preferably be carried according to this specification

SPECIFICATION 4 high solid, glassflake reinforced epoxy system on top of in situ applied epoxy primer for BOOTTOP (and topside), with good resistance to heavy impact (fender areas - ice going vessels) can be finished with a recoatable epoxy coating system linked with 3101-spec. 1, 2, 3 or 4

pretreatment steel; blast cleaned to ISO-Sa2, blasting profile (Rz) 50-100 m

paint system Sigma Multiguard primer 100 m Sigma Glassflake 400 m

notes if a recoatable epoxy coating is required as top coat, Sigma CM coating in a dft of 75 m can be applied on top of Sigma Glassflake if a holding primer is required, Sigma Multiguard primer can be replaced by Sigma Universal primer in a dft of 50 m

maintenance should be carried out to this specification

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December 1999

SPECIFICATION 5 chlorinated rubber/modified acrylic system for BOOTTOP and TOPSIDE system linked with 3101-spec. 5 or 6

pretreatment steel; blast cleaned to ISO-Sa2 steel with approved zinc silicate shop primer; sweep blasted to SPSS-Ss or power tool cleaned to SPSS-Pt3

paint system Sigmachlor primer 75 m Sigma Topacryl coating 100 m Sigma Topacryl finish 35 m

maintenance should preferably be carried out to this specification. the Topacryl range have good overcoating and good drying characteristics also below 0C, which simplifies maintenance

SPECIFICATION 6 bituminous aluminium/alkyd system for BOOTTOP (and topside), colours black, redbrown or green (4199) system linked with 3101-spec. 7

pretreatment steel; blast cleaned to ISO-Sa2 steel with approved zinc silicate shop primer; sweep blasted to SPSS-Ss or power tool cleaned to SPSS-Pt3

paint system Sigmarine alu primer light 75 m Sigmarine alu primer dark 75 m Sigmarine BTD 35 m Sigmarine BTD 35 m

maintenance should be carried out to this specification

MAINTENANCE

As in normal docking practice, fouling, flaking paint and salt deposits must be removed by high pressure water cleaning. The removal of an oil or grease belt can be achieved by scraping heavy deposits from the surface followed by high pressure water cleaning in combination with the use of suitable detergents. This should be followed by a thorough fresh water wash and drying prior to blasting and/or repainting. It might, however, be necessary to blast clean such areas after this operation when oil has penetrated the underlying paint systems. Rusty spots should be pretreated by blast cleaning and touched up with the original system, or with Sigma Universal primer, followed by build and topcoat within the requirements given in the relevant specifications.

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December 1999 REFERENCES

Sigma CM coating see product data sheet 7466 Sigma CM miocoat see product data sheet 7465 Sigma Glassflake see product data sheet 7952 Sigma Multiguard see product data sheet 7951 Sigma Multiguard primer see product data sheet 7922 Sigma Multimastic see product data sheet 7430 Sigma Proferral MC see product data sheet 7171 Sigma Topacryl coating see product data sheet 7350 Sigma Topacryl finish see product data sheet 7355 Sigma Universal primer see product data sheet 7417 Sigmachlor primer see product data sheet 7318 Sigmadur gloss see product data sheet 7528 Sigmarine alu primer see product data sheet 7111 Sigmarine BTD see product data sheet 7238 Sigmaweld MC see product data sheet 7177 Cleaning of steel and removal of rust see information sheet 1490 Hydrojetting see information sheet 1498 Prefabrication primers see system sheet 3015

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3103 SYSTEMS FOR DECKS

a five page issue December 1999 revision of 5-1997

Application areas: all decks on ships, interior and exterior.


Specification 1: zinc silicate coating system Specification 2: high build epoxy coating system Specification 3: epoxy coating system Specification 4: alkyd coating system Specification 5: chlorinated rubber/modified acrylic coating system GENERAL ASPECTS

Decks on ships are constantly exposed to the environment (UV in sunlight, rain, wind) and periodically awash with seawater. They are subject to occasionally heavy foot and mechanical traffic and sometimes chemical spillage. Their aesthetic properties are always important, but they also have a strong protective element (both anticorrosive and safety). The main requirements for such coating systems are:

good anticorrosive properties excellent adhesion flexibility good impact resistance resistance against spillage of hydrocarbons, aromatics, chemicals and detergents easy to maintain non slippery Non-skid properties can be obtained by adding 10% by weight of a special silica (such as Minigrain No. IV), or fine coconut shells to the last coat of a paint system. In case of contamination with oil or lubricants a very coarse material like Minigrain No. 1 can be used to further enhance non-skid properties. In this case an extra coat is necessary to ensure adhesion of the embedded anti-skid material and the dft of the total system should be increased in order to give the correct anticorrosive protection. SURFACE PRETREATMENT

Best results are obtained on ISO-Sa2 blast cleaned steel. If the surface has been treated with a suitable shop primer, sweep blasting is required to a minimum of SPSS-Ss or powertool cleaning to SPSS-Pt3. Rusty areas should be blast cleaned to ISO-Sa2. Also possible is cleaning by hydrojetting.

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December 1999

SPECIFICATION 1 in situ applied zinc silicate system, excellent resistant to corrosion, abrasion and mechanical impact

pretreatment steel; blast cleaned to ISO-Sa2 steel with approved zinc silicate shop primer; sweep blasted to SPSS-Ss

paint system Sigma silicate MC 75 m

maintenance small areas should be spot blasted to ISO-Sa2 or power tool cleaned to SPSS-Pt3 major repairs must be carried out to this specification

SPECIFICATION 2 high build epoxy coating with excellent abrasion resistance

pretreatment steel; blast cleaned to ISO-Sa2 steel with approved zinc silicate shop primer; sweep blasted to SPSS-Ss, or power tool cleaned to SPSS-Pt3 steel; hydrojetted to VIS WJ2/3 L (for more info see sheet 1498)

paint system Sigma Multiguard primer 100 m Sigma Multiguard 150 m Sigma CM coating 75 m

notes if gloss is required, an extra coat of Sigmadur gloss (dft of 50 m) should be applied if a holding primer is required, Sigma Multiguard primer can be replaced by Sigma Universal primer in a dft of 50 m


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December 1999

SPECIFICATION 3 epoxy system in situ applied. Good resistance to abrasion, spillage of oils and mild chemicals

pretreatment steel; blast cleaned to ISO-Sa2 shop primed steel; sweep blasted to SPSS-Ss or power tool cleaned to SPSS-Pt3 steel; hydrojetted to VIS WJ2/3 L (for more info see sheet 1498)


notes if gloss is required, an extra coat of Sigmadur gloss (dft of 50 m) should be applied if a holding primer is required, Sigma Multiguard primer can be replaced by Sigma Universal primer in a dft of 50 m followed by Sigma Multiguard in a dft of 200 m if a recoatable epoxy system is required, Sigma CM coating should be specified as topcoat


SPECIFICATION 4 alkyd based system on top of a zinc phosphate rust inhibiting primer moderate abrasion resistance

pretreatment steel; blast cleaned to ISO-Sa2 or power tool cleaned to ISO-St3 steel with approved shop primer; power tool cleaned to SPSS-Pt3

paint system Sigmarine primer ZP 35 m Sigmarine primer ZP 35 m Sigmarine BTD 35 m Sigmarine BTD 35 m

note Sigmarine primer ZP is free from lead and chrome containing pigments if required, Sigmarine primer RL is available

maintenance should preferably be carried out to this specification or with Sigmarine Multiprimer as first coat (dft of 75 m)

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December 1999

SPECIFICATION 5 chlorinated rubber/modified acrylic system applied in situ not suitable for decks where spillage of oils and/or solvents can be expected

pretreatment steel; blast cleaned to ISO-Sa2 or power tool cleaned to ISO-St3 steel with shop primer; sweepblasted to SPSS-Ss or power tool cleaned to SPSS-Pt3

paint system Sigmachlor primer 75 m Sigma Topacryl coating 75 m

maintenance should preferably be carried out to this specification or with Sigmarine Multiprimer as first coat (dft of 75 m) the Topacryl range has good overcoating and good drying characteristics (to below 0C) which simplifies maintenance

MAINTENANCE

The system to be used for maintenance will depend on the size of repair, possibilities of surface preparation and the weather conditions. The removal of oil, grease and contamination can be achieved by high pressure water cleaning in combination with the use of suitable detergents. This should be followed by a thorough fresh water wash and drying before blast cleaning and/or repainting. For major areas of breakdown maintenance is normally carried out by a fresh water wash and reblasting to ISO-Sa2 and recoating with the original system. Minor areas can be power tool cleaned to SPSS-Pt3. When blast cleaning (dry or wet) is impossible or not tolerated the surface should be derusted by means of power tool cleaning to a minimum of SPSS-Pt2 and primed with Sigma Multimastic (dft of 60 m) followed by the build coat and top coat as described in the specification.

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December 1999 REFERENCES

Sigma CM coating see product data sheet 7466 Sigma Multiguard see product data sheet 7951 Sigma Multiguard primer see product data sheet 7922 Sigma Multimastic see product data sheet 7430 Sigma silicate MC see product data sheet 7568 Sigma Topacryl coating see product data sheet 7350 Sigma Universal primer see product data sheet 7417 Sigmachlor primer see product data sheet 7318 Sigmadur gloss see product data sheet 7528 Sigmarine BTD see product data sheet 7238 Sigmarine Multimastic see product data sheet 7430 Sigmarine Multiprimer see product data sheet 7110 Sigmarine primer RL see product data sheet 7113 Sigmarine primer ZP see product data sheet 7135 Cleaning of steel and removal of rust see information sheet 1490 Hydrojetting see information sheet 1498

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3104 SYSTEMS FOR SUPERSTRUCTURE AND DECK FITTINGS

a four page issue October 1999 revision of 9-1998

Application areas: all ferrous and non ferrous metal surfaces of superstructure and deck fittings. Contains following specifications:

Specification 1: polyurethane/epoxy coating system Specification 2: alkyd coating system Specification 3: chlorinated rubber/modified acrylic coating system Specification 4: water borne acrylic coating system GENERAL ASPECTS

With superstructures on vessels, aesthetic considerations are very much to the fore. Well maintained superstructures are a reflection of the care and attention enjoyed by the vessel. Superstructure systems should have:

good adhesion and anticorrosive properties resistance to wind, rain, seawater non-yellowing properties good gloss retention easy to maintain SURFACE PRETREATMENT

Steel: the quality of the secondary surface pretreatment affects the performance of the recommended paint systems. It is not common practice to reblast a superstructure and deck fittings despite the fact that this pretreatment results in the best performance. In general most types of shop primers are accepted provided that the surface is cleaned of all kind of contamination and rust. Sigmarine primer ZP, Sigmarine Multiprimer and Sigma Universal primer in particular have a good tolerance for substrates which are pretreated by means of mechanical cleaning. Galvanized steel and aluminium; degreasing and removal of salts by means of mechanical cleaning and rinsing e.g. by brushing with nylon brushes and use of abundant clean freshwater. Surface must be allowed to dry completely.

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October 1999

SPECIFICATION 1 recoatable polyurethane/epoxy system for SUPERSTRUCTURE with excellent durability and gloss retention

pretreatment steel; blast cleaned to ISO-Sa2 or power tool cleaned to ISO-St3 steel with approved shop primer; sweep blasted to SPSS-Ss or power tool cleaned to SPSS-Pt3 or SPSS-Pt2 galvanized steel and aluminium; degreasing and removal of salts by means of mechanical cleaning and rinsing e.g. by brushing with nylon brushes and use of abundant clean freshwater surface must be allowed to dry completely steel; hydrojetted to VIS WJ2/3 L (for more info see sheet 1498)

paint system Sigma Universal primer 50 m Sigma CM coating 75 m Sigmadur gloss 50 m

maintenance should preferably be carried out to this specification both Sigma CM coating and Sigmadur gloss have good overcoating and good curing characteristics also below 0C, which simplifies maintenance

SPECIFICATION 2 alkyd system for SUPERSTRUCTURE and DECK FITTINGS

pretreatment steel; blast cleaned to ISO-Sa2 or power tool cleaned to ISO-St3 steel with approved shop primer; sweep blasted to SPSS-Ss or power tool cleaned to SPSS-Pt3 or SPSS-Pt2 galvanized steel and aluminium; degreasing and removal of salts by means of mechanical cleaning and rinsing e.g. by brushing with nylon brushes and use of abundant clean freshwater surface must be allowed to dry completely

paint system Sigmarine primer ZP 35 m Sigmarine primer ZP 35 m Sigmarine undercoat 35 m Sigmarine Enamel white 35 m

note 1 for galvanized steel and aluminium substrates, Sigmarine primer ZP should be replaced by Sigma Universal primer (dft of 50 m)

note 2 Sigmarine primer ZP is free from lead and chrome containing pigments if required Sigmarine primer RL is available

note 3 if faster drying is required two coats of Sigmarine primer ZP can be replaced by one coat of Sigmarine Multiprimer (dft of 75 m)


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October 1999

SPECIFICATION 3 chlorinated rubber/modified acrylic system for SUPERSTRUCTURE and DECK FITTINGS

pretreatment steel; blast cleaned to ISO-Sa2 or power tool cleaned to ISO-Pt3 steel with approved shop primer; sweepblasted to SPSS-Ss or power tool cleaned to SPSS-Pt3

paint system Sigmachlor primer 75 m Sigma Topacryl coating 75 m Sigma Topacryl finish 35 m

note for galvanized steel and aluminium substrates Sigmachlor primer must be replaced by Sigma Universal primer (dft of 50 m)

maintenance should preferably be carried out with Sigmarine Multiprimer as first coat (dft of 75 m) or to this specification the Topacryl range has good overcoating and good drying characteristics also below 0C, which simplifies maintenance

SPECIFICATION 4 waterborne acrylic coating system for SUPERSTRUCTURE and DECK FITTINGS

pretreatment steel without mill scale; blastcleaned to ISO-Sa2 or power tool cleaned to ISO-St3 steel with approved shop primer; sweepblasted to SPSS-Ss or power tool cleaned to SPSS-Pt2

paint system Sigmacrylic primer 50 m Sigmacrylic primer 50 m Sigmacrylic finish 50 m


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October 1999 MAINTENANCE

The system to be used for maintenance will depend on the size of repair, possibilities of surface preparation and the weather conditions. The removal of oil, grease and contamination can be achieved by high pressure water cleaning in combination with the use of suitable detergents. This should be followed by a thorough freshwater wash and drying before blast cleaning and/or repainting. For major areas of breakdown maintenance is normally carried out by a freshwater wash and reblasting to ISO-Sa2 and recoating with the original system. Minor areas can be power tool cleaned to SPSS-Pt3. When blast cleaning (dry or wet) is impossible or not tolerated the surface should be derusted by means of power tool cleaning to a minimum of SPSS-Pt2 and primed with Sigma Multimastic (dft of 60 m) followed by the build coat and top coat as described in the specification. REFERENCES

Sigma CM coating see product data sheet 7466 Sigma Multimastic see product data sheet 7430 Sigma Topacryl coating see product data sheet 7350 Sigma Topacryl finish see product data sheet 7355 Sigma Universal primer see product data sheet 7417 Sigmachlor primer see product data sheet 7318 Sigmacrylic primer see product data sheet 7150 Sigmacrylic finish see product data sheet 7250 Sigmadur gloss see product data sheet 7528 Sigmarine BTD see product data sheet 7238 Sigmarine Enamel see product data sheet 7240 Sigmarine Multiprimer see product data sheet 7110 Sigmarine primer RL see product data sheet 7113 Sigmarine primer ZP see product data sheet 7135 Sigmarine undercoat see product data sheet 7213 Cleaning of steel and removal of rust see information sheet 1490 Hydrojetting see information sheet 1498

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3105 SYSTEMS FOR INTERIOR(S)

a three page issue February 2000 revision of 5-1997

Application areas: wet and dry accommodation spaces, service spaces. Contains following specifications:

Specification 1: recoatable polyurethane/epoxy system Specification 2: alkyd system Specification 3: waterborne acrylic coating system Specification 4: emulsion paint system GENERAL ASPECTS

Paint systems for wet accommodation spaces, such as bath rooms, showers, galleys and toilets must be corrosion inhibiting, water, soap and scratch-resistant, easy to clean and non yellowing. For reasons of hygiene they should be light coloured. Paint systems for dry accommodation spaces among which engine room, provision store, cabins, hospital, etc. should have long lasting adhesion to the various substrates, be easily recoatable and usually decorative. Many countries require the paints to be fire retarding. VENTILATION

adequate ventilation must be maintained during application and curing (please refer to sheet 1433 and 1434)

SPECIFICATION 1 recoatable polyurethane/epoxy system with excellent hygienic properties for wet and dry accommodation and service spaces

pretreatment steel without mill scale; blast cleaned to ISO-Sa2 or power tool cleaned to ISO-St3 steel with approved shop primer; sweep blasted to SPSS-Ss or power tool cleaned to SPSS-Pt2 galvanized steel and aluminium; degreasing and removal of salts by means of mechanical cleaning and rinsing e.g. by brushing with nylon brushes and use of abundant clean fresh water surface must be allowed to dry completely polyester and other plastics (to be specified and checked); degreased and freed of contaminants by means of mechanical cleaning wood, hard board, chip board; to be sanded before and after application of the first primer coat

paint system Sigma Universal primer 50 m Sigma CM coating 75 m Sigmadur gloss 50 m


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February 2000

SPECIFICATION 2 alkyd system for dry accommodation spaces when fully cured and not permanently exposed to water system is certified for low flame spread, see sheet 1833A

pretreatment steel without mill scale; power tool cleaned to ISO-St3 steel with approved shop primer; power tool cleaned to SPSS-Pt2 wood, hard board, chip board; to be sanded before and after application of the first primer coat

paint system Sigmarine multiprimer 75 m Sigmarine Enamel (white) 35 m

note 1 for wet accommodation spaces an extra coat of Sigmarine Enamel is required

note 2 for wood, hard board and chip board Sigmarine multiprimer can be replaced by Sigmarine undercoat if a very smooth surface is required, a knifing filler should be applied after application of the (thinned) primer

note 3 Sigmarine multiprimer is free from lead and chrome containing pigments if required Sigmarine primer ZP is available


SPECIFICATION 3 water borne acrylic coating system for dry accommodation spaces

pretreatment steel without mill scale; blastcleaned to ISO-Sa2 or power tool cleaned to ISO-St3 steel with approved shop primer; sweepblasted to SPSS-Ss or power tool cleaned to SPSS-Pt2

paint system Sigmacrylic primer 75 m Sigmacrylic finish 50 m


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February 2000

SPECIFICATION 4 emulsion paint system for soft board ceilings, plastered pipelines, fibre cement plates and insulating materials with good resistance to wet scrubbing

pretreatment all substrates; removal of contaminants highly absorbent surfaces, to be impregnated with a strong diluted extra coat

paint system Sigmatex 35 m Sigmatex 35 m


REFERENCES

Sigma CM Coating see product data sheet 7466 Sigma Universal Primer see product data sheet 7417 Sigmacrylic primer see product data sheet 7150 Sigmacrylic finish see product data sheet 7250 Sigmarine multiprimer see product data sheet 7110 Sigmarine primer ZP see product data sheet 7135 Sigmarine Enamel see product data sheet 7240 Sigmarine undercoat see product data sheet 7213 Sigmadur gloss see product data sheet 7528 Sigmatex see product data sheet 8215 Safe working in confined spaces see information sheet 1433 Directives for ventilation practice see information sheet 1434 Cleaning of steel and removal of rust see information sheet 1490 Certificates for low-flame spread see information sheet 1883 (A)

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3106 SYSTEMS FOR BALLAST-, FRESHWATER AND POLLUTED WATER TANKS

a five page issue January 2000 revision of 5-1997

Application areas: internal areas of Ballast Tanks and Freshwater Tanks.

For all applications special attention should be given to the specific instructions given in data sheets.


Specification 1: solvent free epoxy coating system Specification 2: high solid epoxy coating system Specification 3: high solid epoxy mastic coating system Specification 4: coaltar epoxy coating system Specification 5: semi-hard maintenance system Specification 6: high sold epoxy system Specification 7: phenolic epoxy system BALLAST TANKS

Ballast Tanks are among the most critical areas within a ship as regards corrosion protection. During the life time of a ship these areas are subject to water exposure either by seawater or when empty to heavy condensation which can be even more aggressive to organic coatings. Ballast coatings may also be exposed to considerable temperature shock especially during reballasting operations.

Apart from the aggressive conditions, ballast/freshwater tanks and double bottoms are always of a complex structure and in addition are not usually easily accessible. These factors determine the main criteria that a ballast tank or double bottom coating has to fulfil.

Firstly the coating has to exhibit superior water resistance. Not only should it resist permanent immersion in seawater but it should resist condensation at high temperatures. Preferably this property should be combined with good application properties including good edge covering characteristics. (It is known from experience that the first paint breakdown occurs at areas that are difficult to coat such as sharp edges, weldseams, ratholes etc.). The film thickness at these areas is often far from sufficient due to poor accessibility, and edge receding (natural tendency related to surface tension, where a freshly applied paint film moves away from sharp edges). These problems are addressed in Spec. 1. For adequate protection a two coat system is recommended as is close control of film thickness on areas which are difficult to access.

Acceptance of shop primer

The quality and nature of shop primer will determine the performance of the coating system. The types of shop primer acceptable are those which are approved by Sigma Coatings and equivalent to the following products: Sigma Proferral MC and Sigmaweld MC - zinc silicate. In addition, any degradation or underfilm corrosion of the shop primer will limit the performance of the total system, unless correctly treated.

The general condition of the weathered shop primer may vary widely throughout the structure and in many instances it is difficult to assess the severity of breakdown.

Approved zinc silicate shop primers in good condition should be cleaned to remove contamination and/or zinc salts.

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January 2000 If necessary, sweep blasting according to SPSS-Ss or mechanical cleaning according to SPSS-Pt3 should be carried out. Special attention should be paid to heat damaged areas and weldseams, including areas along weldseams and backburns.

For recommended application instructions see working procedure

SPECIFICATION 1 solvent free, high performance epoxy coating system for Ballast Tanks, with good edge covering capacity, suitable for block stage application

pretreatment steel; blast cleaned to ISO-Sa2 (blasting profile Rz 40-70 m) steel with approved zinc silicate shop primer; sweep blasted to SPSS-Ss or powertool cleaned to SPSS-Pt3

paint system Sigmaguard BT primer 100 m Sigmaguard BT 250 m

note Sigmaguard BT primer can be replaced by Sigma Universal primer in a dft of 75 m

min. and max. dft min. dft is 350 m according to 90/10 rule*; whilst for solvent free coating for the system systems higher max dfts do not influence long time performance, we

recommend the max. dft below 1000 m

note for critical areas and for pit-filling requirements higher maximum dfts may be permitted (please consult your local Sigma Coatings office for further details)

maintenance should be carried out according to this specification * 90/10 rule: 90% of the recommended dft is acceptable for up to 10% of the readings only. See further sheet 1411

SPECIFICATION 2 high solid epoxy coating system for Ballast Tanks, suitable for block stage application

pretreatment steel; blast cleaned to ISO-Sa2 (blasting profile Rz 40-70 m) steel with approved zinc silicate shop primer; sweep blasted to SPSS-Ss or powertool cleaned to SPSS-Pt3

paint system Sigmaguard Tankshield primer 125 m Sigmaguard Tankshield coating 125 m

note at temperatures below 5C Sigmaguard tankshield system should be replaced by Sigmaguard tankshield LT-V system

min. and max. dft min. dft is 250 m according to 90/10 rule*; max. dft is 800 m for the system applied in two equal coats


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January 2000

SPECIFICATION 3 high solid epoxy mastic coating system for Ballast Tanks

pretreatment steel; blast cleaned to ISO-Sa2 (blasting profile Rz 40-70 m) steel with approved zinc silicate shop primer; sweep blasted to SPSS-Ss or powertool cleaned to SPSS-Pt3 for maintenance abrasive blasting to ISO Sa2 or hydrojetted to VIS WJ2 L



if a holding primer is required, Sigma Universal primer can be used (dft of 50 m) and the following specification can be used

Sigma Universal primer 50 m Sigma Multimastic 200 m

min. and max. dft min. dft is 250 m according to 90/10 rule*; max. dft is 800 m for the system


SPECIFICATION 4 coal tar epoxy coating system for Ballast Tanks, suitable for block stage application

pretreatment steel; blast cleaned to ISO-Sa2 (blasting profile Rz 40-70 m) steel with approved zinc silicate shop primer; sweep blasted to SPSS-Ss or power tool cleaned to SPSS-Pt3 if a holding primer is required, Sigma Universal primer can be used (dft of 50 m) steel; hydrojetted to VIS WJ2 L

paint system Sigma TCN 300 brown 125 m Sigma TCN 300 black 125 m

note 1 edges, weldseams, bolt holes etc. to be stripe coated with Sigma Universal primer or Sigma TCN 300 brown

note 2 at temperatures below 5C Sigma TCN 300 should be replaced by Sigma TCN-LT 300



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January 2000

SPECIFICATION 5 Semi-hard coating for maintenance of Ballast Tanks

pretreatment steel; remove loose rust/scale poorly adhering paint and contamination by i.e. power tool cleaned to ISO-St2 or hydrojetting to VIS WJ4 L previous coat dry and free from any contamination

paint system Sigma Balamastic green 150 m Sigma Balamastic grey 150 m

min. and max. dft min. dft is 300 m according to 90/10 rule*; max. dft is 800 m for the system applied in two equal coats * 90/10 rule: 90% of the recommended dft is acceptable for up to 10% of the readings only. See further sheet 1411

SPECIFICATION 6 high solids epoxy system for polluted water tanks

pretreatment steel; blast cleaned in situ to at least ISO-Sa2 blasting profile (Rz); 50 m - 100 m

paint system Sigma Phenguard primer 100 m Sigmaguard HS 250 m

min. and max. dft min. dft is 350 m; max. dft is 700 m for the system

SPECIFICATION 7 phenolic epoxy system for polluted water tanks

pretreatment steel; blast cleaned in situ to at least ISO-Sa2 blasting profile (Rz); 50 m - 100 m

paint system Sigma Phenguard primer 100 m Sigma Phenguard coating 100 m Sigma Phenguard finish 100 m

note see for more info sheet 3322

min. and max. dft min. dft is 300 m; average max. dft is 500 m, and locally the max dft for the system should not exceed 600 m, see further sheet 3322

VENTILATION

adequate ventilation must be maintained during application and curing (please refer to sheet 1433 and 1434)

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January 2000 REFERENCES

Sigma Balamastic see product data sheet 7104 Sigma Proferral MC see product data sheet 7171 Sigma Multimastic see product data sheet 7430 Sigma TCN-LT 300 see product data sheet 7483 Sigma TCN 300 see product data sheet 7472 Sigma Universal primer see product data sheet 7417 Sigmaguard BT see product data sheet 7953 Sigmaguard BT primer see product data sheet 7921 Sigmaguard HS see product data sheet 7448 Sigmaguard Tankshield coating see product data sheet 7473 Sigmaguard Tankshield primer see product data sheet 7400 Sigmaguard Tankshield LT-V coating see product data sheet 7958 Sigmaguard Tankshield LT-V primer see product data sheet 7925 Sigmaweld MC see product data sheet 7177 Explanation to product data sheets see information sheet 1411 Safe working in confined spaces see information sheet 1433 Directives for ventilation practice see information sheet 1434 Cleaning of steel and removal of rust see information sheet 1490 Certificates for low-flame spread see information sheet 1883 Food certificates see information sheet 1884 Recognized corrosion control coating (Lloyds register) see information sheet 1886

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3107 SYSTEMS FOR CARGO HOLDS

a five page issue October 1999 revision of 5-1997

Application areas: Cargo holds, for the carriage of WET or DRY cargoes such as, grain, flour, sugar etc.

For application details, careful attention should be given to the relevant working procedures, cargo hold resistance list and product data sheet.

Relevant specifications:

Specification 1: solvent free glassflake epoxy system Specification 2: reinforced high solid epoxy coating system Specification 3: recoatable epoxy system Specification 4: mastic epoxy coating system Specification 5 alkyd system NEWBUILDING - ACCEPTANCE OF SHOP PRIMER

The quality and nature of shop primer will determine the performance of the coating system and for coating systems where high levels of impact and abrasion resistance are required, shop-primer removal is highly recommended. Should it be decided not to remove the shop primer, the types of shop primer acceptable are those which are approved by Sigma Coatings and equivalent to the following products: Sigma Proferral MC and Sigmaweld MC - zinc silicate In addition, any degradation or underfilm corrosion of the shop primer will limit the performance of the total system, unless correctly treated.

The general condition of the weathered shop primer may vary widely throughout the structure and in many instances it is difficult to assess the severity of breakdown. Approved shop primers in good condition should be cleaned to remove contamination and/or zinc salts. If necessary, sweep blasting according to SPSS-Ss or mechanical cleaning according to SPSS-Pt3 should be carried out. Special attention should be paid to areas damaged by heat. Experience shows that in practice reblasting of corroded shop primed steel to ISO-Sa2 is the most satisfactory method of correcting corrosion defects and eliminating the detrimental effect of surface contamination. MAINTENANCE

Whilst optimum coating performance will be achieved when applied on a substrate abrasive blasted to ISO-Sa2, in practice this is not always possible, ( i.e for older bulkers where ISO-Sa2 is the best standard achievable) and other surface preparation methods and standards may be used, however, in some cases this can lead to a reduction in the mechanical resistance of the applied coating system.

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October 1999

SPECIFICATION 1 solvent free glassflake epoxy system with with excellent impact and abrasion resistance, especially recommended for carriage of hard angular cargoes

pretreatment steel; blast cleaned to ISO-Sa2 (blasting profile Rz 50-100 m) steel; hydrojetted to VIS WJ2/3 L for dry cargo hold steel; hydrojetted to VIS WJ2/3 L for wet cargo hold (for more info see sheet 1498)

paint system Sigmaguard CSF Glassflake 400 -500 m

note edges, weld seams, bolts etc. to be stripe coated

maintenance should be carried out according to this specification

SPECIFICATION 2 reinforced high solid epoxy coating system for both newbuilding and maintenance situations with outstsanding impact and abrasion resistance and suitable for carriage of hard angular cargoes

pretreatment steel; blast cleaned to ISO-Sa2 (blasting profile Rz 40-70 m) steel with approved shop primer; sweep blasted to SPSS-Ss or power tool cleaned to SPSS-Pt3 steel; hydrojetted to VIS WJ2/3 L for dry cargo hold steel; hydrojetted to VIS WJ2/3 L for wet cargo hold (for more info see sheet 1498)

paint system Sigma Multiguard primer 100 m Sigma Multiguard 150 m

note 1 if a holding primer is required Sigma Universal Primer can be applied at a dft of 50 m, replacing the Sigma Multiguard Primer and the dft of the Sigma Multiguard should be increased accordingly

note 2 edges, weld seams, bolts etc. to be stripe coated

note 3 if a recoatable epoxy system is required, Sigma CM coating should be specified as topcoat


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October 1999

SPECIFICATION 3 surface tolerant, unlimited recoatable epoxy coating system for cargo holds for newbuilding and repair situations suitable for carriage of a wide range of cargoes and especially where FDA compliance for carriage of dry foodstuffs is required

pretreatment steel; blast cleaned to ISO-Sa2 (blasting profile Rz 40-70 m) steel with approved shop primer; sweep blasted to SPSS-Ss or power tool cleaned to SPSS-Pt3 steel; hydrojetted to VIS WJ2/3 L for dry cargo hold steel; hydrojetted to VIS WJ2 L for wet cargo hold (for more info see sheet 1498)

paint system Sigma CM miocoat 125 m Sigma CM coating 125 m


SPECIFICATION 4 epoxy mastic coating system, suitable for a wide range of surface pretreatments in both newbuilding and repair situations and for carriage of a wide range of cargoes

pretreatment steel; blast cleaned to ISO-Sa2 (blasting profile Rz 40-70 m) steel with approved shop primer; sweep blasted to SPSS-Ss or power tool cleaned to SPSS-Pt3 steel; hydrojetted to VIS WJ2/3 L for dry cargo hold steel; hydrojetted to VIS WJ2 L for wet cargo hold (for more info see sheet 1498)

paint system Sigma Multimastic 125 m Sigma Multimastic 125 m

note if a recoatable epoxy system is required, Sigma CM coating should be specified as topcoat at 125 m replacing the Sigma Multimastic


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October 1999

SPECIFICATION 5 alkyd system for dry cargo holds certified system for dry solid food products (see sheet 1884)

pretreatment steel without mill scale; power tool cleaned to ISO-St3 steel with approved shop primer; sweep blasted to SPSS-Ss or power tool cleaned to SPSS-Pt3

paint system Sigmarine primer ZP 50 m Sigmarine hold paint alu 25 m Sigmarine hold paint alu 25 m


ONBOARD MAINTENANCE

Maintenance of an applied system is normally carried out by reblasting to the original specification, followed by application of the system. Minor areas of rusting can be mechanically cleaned to SPSS-Pt3 or hydrojetting to at least VIS WJ2 L (for more info see sheet 1498) and recoated with the specified system.

A temporary protection can be provided with Sigmarine Holdbrite. For overcoating systems which are not of Sigma manufacture, consult local Sigma representative. VENTILATION

Adequate ventilation must be maintained during application and curing (please refer to sheet 1433 and 1434 and cargo hold working procedure)

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October 1999 REFERENCES

Sigma CM miocoat see product data sheet 7465 Sigma CM coating see product data sheet 7466 Sigma Multiguard Primer see product data sheet 7922 Sigma Multiguard see product data sheet 7951 Sigma Universal primer see product data sheet 7417 Sigma Multimastic see product data sheet 7430 Sigma Proferral MC see product data sheet 7171 Sigmaguard CSF glassflake see product data sheet 7954 Sigmarine hold paint alu see product data sheet 7263 Sigmarine Holdbrite see product data sheet 7190 Sigmarine Multiprimer see product data sheet 7110 Sigmarine primer ZP see product data sheet 7135 Sigmaweld MC see product data sheet 7177 Safe working in confined spaces see information sheet 1433 Directives for ventilation practice see information sheet 1434 Cleaning of steel and removal of rust see information sheet 1490 Hydrojetting see information sheet 1498

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3108 MISCELLANEOUS SYSTEMS

a three page issue October 1999 revision of 5-1997

Application areas: systems for objects and/or areas on board of ships which are not yet mentioned, such as:

Oil resisting system for below gratings, and engine room below floor level. Systems for void spaces, chain lockers, behind ceilings and linings. Clear varnish system for woodwork internal and external. System for galvanized steel. Contains following specifications:

Specification 1: bitumen system for cofferdams, void spaces etc. Specification 2: solvent free epoxy system for cofferdams, void spaces etc. Specification 3: wood oil phenolic resin clear varnish system Specification 4: epoxy system for galvanized steel ACCEPTANCE OF SHOP PRIMER

The quality and nature of shop primer, will determine the performance of the coating system. The types of shop primer acceptable are those which are approved by Sigma Coatings and equivalent to the following products: Sigma Proferral MC and Sigmaweld MC - zinc silicate. In addition, the condition of the shop primer with regard to degradation and underfilm corrosion will determine the performance of the total system. The general condition of the weathered shop primer may vary widely throughout the structure and in many instances it is difficult to assess the severity of breakdown. Experience shows that in practice reblasting to ISO-Sa2 of corroded shop primed steel is the most satisfactory method of correcting corrosion defects and eliminating the detrimental effect of surface contamination. Approved shop primers in good condition should be cleaned to remove contamination and/or zinc salts. If necessary, sweep blasting according to SPSS-Ss or mechanical cleaning according to SPSS-Pt3 should be carried out. Special attention should be taken to areas damaged by heat.

SPECIFICATION 1 high build bituminous coating system for chain lockers, cofferdams, void spaces and behind linings

pretreatment steel; powertool cleaned to ISO-St3 shop primed steel; powertool cleaned to SPSS-Pt3

paint system Sigma Emaline 3000 250 m edges, weld seams, bolts etc. to be stripe coated

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3108 MISCELLANEOUS SYSTEMS

October 1999

SPECIFICATION 2 system for non immersed areas such as chain cofferdams, void spaces and behind linings cold sprayable solvent free epoxy coating resistant to dry and wet exposure conditions

pretreatment steel; blast cleaned to ISO-Sa2 shop primed steel; sweep blasted to SPSS-Ss

paint system Sigmaguard BT 300 m edges, weld seams, bolts etc. to be stripe coated

SPECIFICATION 3 clear varnish system for interior and exterior use good resistance to salt water, fresh water and abrasion approved for low flame spread, see sheet 1883A

pretreatment open grain wood; free from contamination tropical timber; to be sealed with a clear polyurethane varnish to seal off aggressive products in the wood previous clear coats; free from any contamination, surface should be sandpapered to obtain good adhesion

paint system Sig