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Marine paint is a type of paint specifically designed for use in marine environments. It is used to protect and enhance the surfaces of boats, ships, docks, buoys, and other marine structures. Marine paint is formulated to withstand the harsh conditions of being exposed to water, saltwater, sunlight, and other environmental factors. There are different types of marine paint available, each with specific properties and uses.

Antifouling paint is a type of paint that is specifically designed to prevent the growth of organisms, such as algae, barnacles, and other marine organisms, on the surface of boats, ships, and other underwater structures. These organisms can attach themselves to the surface, causing damage, reducing efficiency, and increasing fuel consumption.

Hull paint can be divided into many types according to the protection performance required for the hull and the different painting environments. Common hull paints include: 1. Epoxy paint 2. Polyurethane paint 3. Antifouling paint (copper-based paint) 4. Acrylic paint

Antifouling paint is the most common type of paint on the bottom of ocean-going ships. Its main function is to prevent the attachment of marine organisms. Antifouling paint inhibits the growth of attached organisms by slowly releasing biocides (such as copper compounds or other organic active ingredients).

Generally, the drying time and curing time of antifouling boat paint determine the time when the ship is put into the water. For most antifouling paints, it takes at least 24 hours for the ship to be put into the water after painting, but this time is not absolute.

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.

If the old paint is in good condition and the new and old paints are compatible, the new paint can be applied directly by cleaning and sanding. However, if the old paint is severely damaged, incompatible or the paint layer is too thick, it is recommended to completely remove it to ensure the performance of the new coat.

Copper ions can interfere with the cell metabolism and respiration process of aquatic organisms, inhibit the growth of algae, shellfish, plankton and marine microorganisms, thereby preventing these organisms from attaching to the bottom of the hull.

The impact of harmful substances in marine antifouling paint on the marine ecosystem is one of the main reasons for prohibiting its use. The marine ecosystem is complex and sensitive, and harmful substances in marine antifouling paint may destroy the balance of this system.

For some special ships, such as merchant ships or fishing boats, which have long sailing time and are usually in a harsh environment, these ships may require thicker antifouling paint coatings, and the coating thickness is generally between 250 and 300 microns.