1. Electroplating: The parts to be electroplated are immersed in an aqueous solution containing the metal compound to be deposited, and current is passed through the plating solution to cause the electroplated metal to precipitate and deposit on the parts. Generally, electroplating includes zinc plating, copper, nickel, chromium, copper-nickel alloy, etc., and sometimes blackening (blue), phosphating, etc. are also included.
2. Hot-dip galvanizing: It is completed by immersing the carbon steel parts in a plating bath with molten zinc at a temperature of approximately 510°C. The result is that the iron-zinc alloy on the surface of the steel gradually turns into passivated zinc on the outer surface of the product. Hot dip aluminizing is a similar process.
3. Mechanical plating: The particles of coated metal are used to impact the surface of the product, and the coating is cold welded to the surface of the product.
