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Marine Protective Coating Systems

Chief Mate
MEO Class 2
MEO Class 1

times asked: 29; times asked
questions: 8; questions
last asked: 2026; last asked

The slides, written out

AI-drawn illustration. Simplified to explain the idea, not to scale.

Slide 1 · CHLORINATED RUBBER

CHLORINATED RUBBER EPOXY POLYURETHANE MARINE PROTECTIVE COATINGS UNDERSTANDING CHLORINATED RUBBER, EPOXY & POLYURETHANE PAINTS Applications, Advantages & Best Practices for Modern Ships

Slide 2 · CHLORINATED

CHLORINATED RUBBER PAINTS Single-pack • Physically Drying CHLORINATED RUBBER PAINT COMPOSITION Binder: Chlorinated rubber resin Pigments & Additives: Often include corrosion-inhibiting pigments like zinc phosphate Solvents: High VOC aromatic solvents – xylene, toluene, etc. Their use has declined because of high VOC emissions and increasingly stringent environmental regulations, although they remain in maintenance service on many existing vessels. USES Decks Superstructure Boot-topping Above-water Hull ADVANTAGES Quick drying Easy maintenance Simple application Fast overcoating LIMITATIONS High VOC emissions Strong solvent odour Strict ventilation requirements Environmental restrictions Gradually replaced by modern low-VOC systems

Slide 3 · EPOXY

EPOXY PAINT SYSTEMS EPOXY BASE HARDENER Two-pack • Chemically Curing COMPOSITION Base: Epoxy resin Hardener: Amine or polyamide compounds Pigments & Additives: Corrosion inhibitors (zinc phosphate, glass flakes, micaceous iron oxide) Solvents: Used to adjust viscosity – high-solids and solvent-free epoxies are widely used today WHY SHIPS USE EPOXY Excellent corrosion protection High abrasion resistance Outstanding seawater resistance Good chemical resistance Long service life with low maintenance TYPICAL APPLICATIONS Ballast tanks IMO PSPC requires a qualified hard coating system. Light-coloured epoxy-based systems are widely used to comply with PSPC. Hull exteriors Used as primer and tie-coat under antifouling systems Cargo holds Excellent protection in dry cargo environments Deck areas High durability for exposed deck surfaces Chemical tanks Phenolic epoxy systems provide excellent chemical resistance IMO NOTE: IMO PSPC (Performance Standard for Protective Coatings) requires qualified hard coating systems for ballast tanks. Light-coloured epoxy-based coating systems are widely used in the industry to meet these requirements.

Slide 4 · POLYURETHANE

POLYURETHANE TOPCOATS Two-pack • UV-Resistant Finish COMPOSITION Base: Polyester or acrylic polyol resin Hardener: Aliphatic isocyanate Pigments: Often include mica or aluminium flakes for decorative and anti-corrosion performance APPLICATIONS Superstructure Provides long-lasting colour and gloss retention Accommodation Block Excellent UV resistance and weather durability Funnel, Mast & Decks Maintains appearance and protects against harsh marine environment Lifeboats & High-Visibility Areas Ideal for aesthetic and identification purposes Helideck Markings Provides durable, UV-stable finish for markings BENEFITS Superior gloss retention Excellent UV resistance Outstanding colour stability High durability Premium cosmetic finish Easy to clean and maintain SAFETY FIRST During spray application, follow the coating manufacturer's SDS and applicable safety regulations. Appropriate respiratory protection—often an air-supplied respirator—is required when spraying isocyanate-containing coatings. Moisture contamination during curing can react with isocyanates and may cause defects such as bubbling, blistering or poor film formation. TYPICAL MARINE COATING SYSTEM STEEL Proper surface preparation EPOXY PRIMER Corrosion protection & adhesion EPOXY INTERIMEDIATE Builds film thickness & enhances durability POLYURETHANE FINISH COAT UV protection, colour & gloss retention

In exams

Asked 29 times across 8 different questions, most recently in 2026. Asked most in Chief Mate (16), MEO Class 2 (10), MEO Class 1 (3).

Drafted by SailR from our daily lessons. AI-drawn illustration. Simplified to explain the idea, not to scale. Last updated 19 Oct 2026.

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