the melt sex, wetting and spray welding sex admirable, and the low melting point, spray welding layer with high hardness, wear resistance, corrosion resistant, heat resistant characteristics, difficult to cutting, with wet grinding advisable. Application: suitable for oxygen plasma spray flame-acetylene or welding process, often used for corrosion resistant, wear-resisting, especially wear resistance of the sliding parts preventive protection and rehabilitation, such as drawing roller, CAM, piston, the conveyor roller mill etc.