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Anticorrosive paint is the base coating in the ship painting system. Its main function is to prevent seawater from corroding the hull metal. Commonly used anticorrosive paints include epoxy and zinc-rich anticorrosive paint.

Based on the above classification, we can clearly say that epoxy primer is indeed a type of anticorrosive paint. Epoxy primer not only has the adhesion enhancement effect of general primers, but more importantly, it plays a vital protective role in the anticorrosion system.

Metal protective paint is a coating specially used to protect metal surfaces from external factors such as oxidation, corrosion, and wear. It forms a dense protective film on the metal surface to isolate air, moisture, and other corrosive media, thereby extending the service life of metal materials.

The purpose of painting the bottom of the ship with anticorrosive primer paint is to protect the metal surface of the hull from seawater, electrochemical corrosion and microbial attachment. Seawater contains a large amount of salt and microorganisms, which are extremely corrosive to metal surfaces.