Gerneral industry mainly inluding varaties of casting pieces include water treatment equipment casting pieces, pipe equipment casting pieces, machine tools casting pieces, hardware tools casting pieces and so on.The coating of casting parts directly affects its appearance quality, service life and its own market competitiveness.With the development of industry, customers’ requirements on the surface treatment performance and appearance quality of cast parts are increasing day by day. The current coating process cannot meet the requirements of mass production and the lack of anti-corrosion performance have become the bottleneck in the development of cast parts industry.