Ship Bottom Paint

The hull is divided into a flat bottom and straight bottom. It has been immersed in seawater for a long time and is subject to electrochemical corrosion and erosion of seawater. When the ship is anchored, it will be fouled by marine organisms. Therefore, the paint on the bottom of the ship must be resistant to seawater corrosion and wear.

The anti-corrosion paint on the ship bottom and the anti-fouling paint should have good adhesion between their coating layers. The outermost antifouling paint should have a good effect of preventing marine organisms from attaching and fouling.

Types of Ship Bottom Paint

The commonly used paints on the bottom of the ship are divided into two types:

Anti-rust paint for ship bottom

Asphalt anti-rust paint, chlorinated rubber antirust paint, vinyl aluminum powder/vinyl asphalt antirust paint, epoxy coal tar antirust paint, modified epoxy antirust paint.
Antifouling paint for ship bottom

Traditional antifouling paint: Asphalt antifouling paint (12-18 months)
Long-lasting antifouling paint: acrylic, chlorinated rubber antifouling paint (24-30 months)
Self-polishing antifouling paint: organotin polymer (36-60 months)
TBT free self-polishing antifouling paint: (36-60 months)
Low surface energy antifouling paint: silicone or fluoropolymer antifouling paint (60 months)

Features Of Ship Bottom Paint

Asphalt anti-rust paint

Asphalt anti-rust paint is generally made of coal tar and anti-rust pigment. It has good wettability to the substrate, and can still obtain a good anti-rust performance to general treated surface. The disadvantage is that film dries slow, and it is not suitable to be exposed to the sun for a long time.
chlorinated rubber anti-rust paint

The chlorinated rubber anti-rust paint has good anti-rust performance and easy and simple application property. The commonly used anti-rust pigments include aluminum powder, iron oxide red, mica iron oxide, etc. When adding asphalt to enhance water resistance, two packs are required.
Vinyl antirust paint

Vinyl antirust paint mainly includes vinyl aluminum powder antirust paint, vinyl asphalt paint, epoxy vinyl asphalt and epoxy vinyl paint without asphalt. Vinyl asphalt anticorrosive paint is often used in new shipbuilding. In addition to being used as an anticorrosive paint for ship bottom, it is also often used as an intermediate layer between epoxy coal tar pitch and antifouling paint to help extend the recoat interval. Asphalt-free vinyl anticorrosive paint mostly uses aluminum powder as an anticorrosive pigment, which can be used as an anticorrosive paint on water and underwater parts, and also as an intermediate layer of epoxy anticorrosive paint and antifouling paint.
Glass flake paint

Glass flake paint has a hard and tough coating film, strong abrasion resistance, and very good corrosion resistance. It is used for ultra-long-lasting anti-rust paint and is the first choice in iced water areas. There are high build and solvent-free epoxy glass flake paints, which can be guaranteed to be free of maintenance for more than 5 years. Polyester glass flake paint has longer corrosion resistance and collision resistance. It has more than 25 years of successful application records on offshore platforms.

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