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How To Construct Cargo Hold Coating According To Its Characteristics

Sep 22, 2020

Cargo coatings are used in the cargo holds of ships and must have good adhesion and certain wear resistance. For a long time, general coatings such as alkyd paint have been used. However, in recent years, the contents of fish and fish in the cargo hold of ships have changed, such as bulk fertilizer, grain and feed. Chemical fertilizers are destructive to conventional paint films, causing paint films to fall off and steel plates to rust. Grains and paint film are in direct contact with grains and feeds, so it must be approved by the health department to ensure that the paint film is non-toxic. For large bulk cargo, it is inevitable that there will be empty ships or insufficient cargo during the round-trip transportation. Therefore, it is necessary to fill the middle cargo tank with sea water to ballast, so that the paint on the cargo tank must be like ballast tank The same must be immersed in sea water. There are roughly three types of cargo hold paints that meet these requirements: chlorinated rubber coatings; cold curing epoxy resin coatings; epoxy coumarone resin coatings (commonly known as bleached tar epoxy coatings). The chlorinated rubber paint used in the cargo hold is the same as the chlorinated rubber paint. If it is also used as a coating for shipping grains, the pigments must be non-toxic such as aluminum powder, titanium dioxide, iron oxide red, talc and so on. Cold-curing epoxy coatings can be used as non-toxic cargo tank paints to use epoxy drinking water tank formulations. Although epoxy asphalt paint has excellent water resistance and oil resistance. However, due to the leakage of coal tar pitch, it produces pollution and contains carcinogens, so it cannot be used in food compartments. Because the coal tar pitch is black, epoxy pitch paint can only produce black or brown color, but can not produce light-colored paint. In recent years, coumarone resin has been used to replace coal tar pitch to produce modified epoxy coatings. The seawater resistance of this type of coating is worse than that of tar epoxy, but various light-colored coatings can be prepared. Use in the cargo hold of the