it is zinc economical phosphating treatment agent before spray coating. Workers can adjust process parameter according to different equipment and product condition. Take phosphating treatment both at heating conditions, but also at ambient temperature conditions. Form 3-7micron gray or deep gray phosphating film, can be used both spray and dip through. It is fine bottom layer for powder spray, static spray and air spray. Its combination of strength and joint anti-corrosion performance, are able to meet national standards or industry standards related to technical requirements.