Plastic Plating-what Are Negative And Anodic Coatings

Plastic plating-what are negative and anodic coatings.
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Negative polarity coating refers to a kind of coating in which the potential of the coating is positive to that of the substrate metal under certain conditions, otherwise it is an anodic coating. To determine what kind of coating the coating is, it should be determined by the difference between the potential of the coating in the medium and that of the substrate metal.
Select the required plating species according to the purpose of the coating.
1. Protective coating: the main function is to protect the matrix metal from corrosion and does not specify the decoration requirements of the product, such as galvanizing, cadmium plating, etc.
2. Protective-decorative coating: in addition to protecting the substrate metal, it also makes the parts beautiful, such as nickel plating, nickel / chromium plating, copper / nickel / chromium plating, etc.
3. Functional coating: in addition to having a certain protective effect, it is mainly used for special working purposes, such as tin plating, silver plating, hard chromium and so on.