Status Quo of shipbuilding aluminum alloys corrosion protection technology
The marine environment is a harsh environment, and the requirements for corrosion protection of aluminum alloys in this working environment are higher. For ships, the corrosive environment is different in different parts. The bottom of the ship is mainly affected by the penetration of natural seawater and the adhesion of aquatic organisms. The parts above the waterline are mainly affected by salt spray corrosion and atmospheric aging.
Shipbuilding aluminum alloys antifouling antifouling coating
The corrosive environment of the aluminum alloy ship's bottom and above the waterline is different. The bottom of the ship is mainly the penetration and erosion of natural seawater and the adhesion of aquatic organisms. The above waterline is mainly due to salt spray corrosion and atmospheric aging, therefore, the bottom of the ship The requirements above the waterline for anti-corrosion paints are not exactly the same.

For parts above the waterline, the topcoat should have good resistance to atmospheric aging, good gloss retention, and decorative properties, and be well matched with the primer. Polyurethane finishes and alkyd finishes can be used. Acrylic topcoats, etc., are now commonly used polyurethane finishes. With the continuous improvement of the performance requirements of coatings, fluorocarbon coatings with excellent performance or epoxy- and acrylic-modified fluorocarbon coatings have also begun to be used in the coating systems for aluminum alloys.