A brief discussion on the role of anti-corrosion coatings

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A brief discussion on the role of anti-corrosion coatings: In the design of protective coatings, different applications are assigned based on the specific properties of the film-forming substances. For example: using chemically active film-forming substances as primers, such as epoxy resins. The topcoat uses chemically inert polymers, such as acrylates, aliphatic polyurethanes, and chloro-fluoroethylene resins. By incorporating reactive resins or using catalysts, chemically active film-forming substances undergo chemical reactions between their functional groups during the drying process after coating, resulting in a networked three-dimensional structure; this approach also helps to achieve both good adhesion and weather resistance. In general, in most coating design scenarios, the coating system consists of a primer, an intermediate coat, and a topcoat. The primer provides strong adhesion and bonding to both the substrate and the topcoat, as well as offering corrosion and rust prevention properties ； The intermediate coat is a transitional layer that provides water resistance ； The topcoat serves to protect against corrosive agents and external stresses, and the coating formed by these three layers delivers the overall protective effect.