Application of epoxy resin in anti-corrosion field

Coatings are the primary means of controlling corrosion on ships and marine structures. Anti-corrosion coatings for marine environments must possess the following properties: good adhesion, excellent corrosion resistance, wear resistance, high temperature resistance, and weather resistance. Based on these performance requirements, epoxy resin, a polymer material, is a suitable choice.

Epoxy anti-corrosion coatings are primarily epoxy resins, mixed with pigments, driers, and additives. Epoxy resin coatings offer excellent properties, including high adhesion, strength, and chemical and abrasion resistance. They are one of the earliest and most widely used types of heavy-duty anti-corrosion coatings in the marine anti-corrosion field.

There are various types of epoxy anticorrosive coatings, primarily bisphenol A epoxy resin and novolac epoxy resin. Bisphenol A epoxy resin's molecular structure contains hydroxyl groups, ether bonds, and epoxy groups, resulting in excellent substrate adhesion. Its benzene ring structure imparts high mechanical strength and abrasion resistance. The resulting film exhibits excellent resistance to acids, alkalis, corrosion, and chemicals. It cures at room temperature, facilitating application, with low post-curing shrinkage and zero volatile release, meeting environmental standards.