Multi-layer electroplating refers to the deposition of several metal layers with different properties or materials on the same substrate, namely chemical nickel, coke copper (chemical copper), copper, semi-glossy nickel, bright nickel and chromium multi-layer metal layers. These electroplated coatings are required not only to be beautiful, but also to pass different functional testing requirements such as salt fog, hot and cold cycles, etc. at the same time, each layer is prepared for the next layer of electroplating, and chemical nickel lays the groundwork for the copper layer. the copper layer lays the groundwork for the nickel layer, and the nickel layer lays the groundwork for the chromium layer. if there is a problem in one layer, problems will follow in the next layer, for example. If there is no coating on a small piece of chemical nickel, then this small piece cannot be coated with copper, and even less can be plated with chromium, resulting in a bad phenomenon of leakage plating.
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