Meaning of Coat Adhesion

The essence of adhesion (adhesion) is an interface force, and the adhesion of the coating has its particularity. The adhesion of the organic coating should include two aspects: first, the adhesion between the organic coating and the base metal surface. Adhesion, followed by the cohesion of the organic coating itself. These two are indispensable in the whole system of coating protection. During the effective period of the coating, the coating needs to be firmly attached to the surface of the substrate. The stronger the adhesion, the better; at the same time, the cohesion of the coating is also very important. The coating needs to form a dense, firm and continuous film layer to play a good role. blocking effect. Two aspects are indispensable, poor adhesion, no matter how good the coating is, it will not work; and poor cohesion of the coating itself, the paint film is easy to crack. These two together determine the adhesion of the coating and constitute the key factor determining the protective effect of the coating.

For more information, please refer to the full text of "Research Progress on Adhesion between Coating and Substrate Metal" (Song Yusu, Yao Shuren)