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Chemical composite coating In the plating solution by adding water-insoluble solid particles, so that the main metal co-deposition of the formation of the coating process is called composite plating. If electroplating is used, it is called composite plating; if electroless plating is used, it is called composite electroless plating. The resulting coating is called a composite coating. In principle, all the metal can be coated as the main metal, but research and application of more nickel, chromium, cobalt, gold, silver, copper and other metals. As solid particles are mainly two types, one is to improve the coating wear resistance of high hardness, high melting point particles; one is to improve the self-lubricating coating of solid lubricant particles. The results show that ceric sulfate can promote the penetration of diamond particles into the coating. With the increase of the content of ceric sulfate, the stability of the plating solution increases sharply and then becomes stable. The Ni-P-diamond composite The wear resistance of the coating is better than that of the Ni-P coating.Compared with the Ni-P coating, the corrosion resistance of the composite coating is poor, which is improved after the addition of ceric sulfate.
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