Summary
Compound of polyphosphate, zinc salt and other chemical additives which has good corrosion inhibition to metal and controlling corrosion of recirculated cooling water at initial period to patch and maintain protective film. It also uses as pre-film agent for cycling water system coordinating with the cleansing agent to apply in steel and iron, petrochemical, chemical industry and electric power. Property
Appearance：White powdery solid.
Total phosphate（P2O5）：≥40% Dosage and usage
Initial amount is8～ 20ppm. Pre-film is 400～ 1000ppm。 Safety protection
No special requirements. Package and storage
Inner layer plastic bag and outer layer knitting bag, net weight is 25kg/bag or 50kg/bag.
Preformfilm agent
Summary