Marine Anticorrosive Paint

Performance and Uses

This product is a two-component, long-term anti-corrosive coating specifically designed for the steel structures of entire vessels. It is formulated with epoxy-modified resin as the base material, combined with anti-corrosion pigments/fillers, anti-rust agents, and specialized additives. It delivers core performance in anti-corrosion, anti-rust, and resistance to marine environment degradation, making it highly adaptable for the protection requirements of both above-water and underwater sections of a ship.

  • Superior Marine Durability: Exhibits outstanding resistance to seawater, salt spray, industrial atmospheres, and corrosive marine organism metabolites. It effectively blocks the corrosion of steel structures, thereby extending the vessel’s service life.

  • Efficient Application: Features rapid drying times and convenient application, perfectly adapting to diverse construction scenarios such as dry-docking repairs and onsite touch-ups. It shares exceptional compatibility with marine primers, intermediate coats, and topcoats, forming a dense and uniform film free of pinholes and bubbles.

  • Sub-Zero Application Window: Can be applied normally within a temperature range of -5°C to 35°C, guaranteeing robust film adhesion and anti-corrosive protection in low-temperature environments without requiring extra heating measures.

  • High Mechanical Integrity: Demonstrates exceptionally strong adhesion to vessel steel substrates and compatible coating systems. It resists peeling, flaking, or cracking, and can withstand long-term seawater immersion, wave impacts, and vibrations during navigation.

Applications

Widely utilized for coating steel structures across entire vessels, including the above-water hull, superstructures, decks, cargo holds, engine rooms, ballast tanks, and hatch covers. It is also highly applicable for the anti-corrosive protection of marine-related steel structures such as offshore platforms, ship terminals, and buoys, allowing for tailored combination systems based on the specific section’s requirements.

描述

Physical Parameters

  • Color: Grey, iron red, silver white (specialized marine anti-corrosive colors, customizable upon request)

  • Gloss: Matt / Flat, Semi-gloss (semi-gloss can be selected for decks and superstructures; flat is preferred for underwater areas)

  • Standard Film Thickness:

    • Wet Film Thickness (WFT): 180 μm

    • Dry Film Thickness (DFT): 70 μm

  • Theoretical Spreading Rate: Approx. 4.7 ㎡/kg

  • Flash Point: 40°C

  • Density: Approx. 1.35 g/cm³ (after mixing the two components)

Application Instructions

  • Mixing Ratio: Base : Curing Agent = 10 : 1 (by weight)

  • Pot Life (23°C): 2 hours

  • Thinner: Marine Anti-Corrosive Paint Dedicated Thinner (Note: The use of general thinners is strictly prohibited as it will compromise the film’s anti-corrosive properties.)

  • Cleaning Solvent: Marine Anti-Corrosive Paint Dedicated Thinner. Clean all tools immediately after use to completely remove residual paint, preventing cleanup difficulties caused by product curing.

  • Application Methods: Airless Spray, Conventional Air Spray, or Brush/Roller Coating.

Spraying Parameters

ParameterAirless SprayConventional Air SprayBrush / Roller
Nozzle/Tip Size(Graco) 163T-621/6232.5 ~ 3.5 mm
Fluid Pressure (MPa)18 ~ 400.4 ~ 0.6
Thinning Ratio0 ~ 8%8 ~ 15%8 ~ 15%

Note: Airless and conventional air spray data are for reference only and can be adjusted during practical application.

Drying Time & Full Curing Time

Substrate Temp. (°C)Surface Dry (min)Hard Dry (h)Full Curing Time (h)
-51802472
10901248
2060824
3030616

Surface Preparation

  • The surface of the substrate or intermediate coat must be clean, dry, and completely free of oil stains, corrosion, old paint residue, and contaminants.

  • Surface cleanliness should reach Sa2.5 grade (abrasive blasting) or St3 grade (manual/power-tool cleaning). Remove surface salts, dirt, and dust using high-pressure fresh water, allowing the surface to dry completely (moisture content $\le$ 8%) before application.

  • When overcoating existing marine anti-corrosive paint or epoxy coatings, the old film must be abraded and roughened to eliminate chalked or loose areas, ensuring excellent intercoat adhesion and preventing delamination.

Application Conditions

  • Temperature & Humidity: The application temperature range is -5 ~ 35°C with a relative humidity (RH) below 85%. The substrate surface temperature must be at least 3°C above the dew point. All measurements should be taken close to the substrate at the dry-dock site.

  • High-Temperature Constraints: Coating operations are not recommended if the substrate surface temperature exceeds 45°C, avoiding film defects like pinholes, wrinkling, or incomplete curing.

  • Adverse Weather: Outdoor application is strictly prohibited during rain, snow, heavy winds, sandstorms, dense fog, or high humidity conditions.

  • Sub-Zero Operations: For applications below 0°C, the substrate surface must be entirely free of ice, snow, or frost, and anti-freezing measures must be taken to guarantee normal film formation.

Coating System Compatibility

  • Preceding Coats: Zinc-Rich Epoxy Primer or Epoxy MIO Intermediate Paint.

  • Subsequent Coats: Marine Antifouling Paint can be applied as a topcoat for underwater sections, while specialized Marine Anti-Corrosive Topcoat can be directly matched for above-water sections. Using these in combination creates a complete, long-term marine anti-corrosive system.

Packaging Specifications

  • Base (Part A): 20 kg

  • Curing Agent (Part B): 2 kg

Storage

  • Store this product in a cool, dry, and well-ventilated indoor warehouse, away from open flames and heat sources. Avoid direct sunlight.

  • Do not store together with acidic or alkaline substances. The shelf life is 12 months under normal room temperature (5-30°C) conditions.

  • The base and curing agent must be stored separately. Once opened, the product should be used as soon as possible; any unused portion must be tightly sealed and stored.

Safety Precautions

  • All sources of ignition and smoking are strictly prohibited at the mixing and application sites. Maintain excellent ventilation to reduce paint mist concentration and avoid the inhalation of harmful components.

  • Applicators must wear appropriate personal protective equipment (PPE), including protective masks, safety goggles, and solvent-resistant gloves to avoid paint mist inhalation or eye and skin contact.

  • If paint contacts the skin, wash immediately with soap and water or a specialized skin cleanser. If it splashes into the eyes, rinse continuously with plenty of water for at least 15 minutes and seek immediate medical attention.

  • Warning signs must be placed around the application area to restrict unauthorized entry. Clean up residual coatings and thinners promptly after construction to avoid polluting the marine and surrounding environments.

Disclaimer

  • The protective performance of any coating largely depends on application factors. Surface preparation and film thickness will directly affect the service life of the coating. Users must ensure compliance with the specified application conditions.

  • The data provided in this manual are theoretical values or derived from experimental accumulation. Some data may change due to continuous product improvements without prior notice.

  • When our company’s technical personnel are not present at the application site, the company is solely liable for the quality of the coating product itself.