Heteropolyacid system phosphorization technology


Application Number  00128250 Application Date  2000.12.14
Publication Number  1358883 Publication Date  2002.07.17
Priority Information    
International
Classification
 C23C22/42  
Applicant(s) Name  Hua Xuan  
Address    
Inventor(s) Name  Hua Xuan  
Patent Agency Code  00000 Patent Agent  
AbstractIn present invention, keygin type heteropolyacid with oxidation reduction catalytic activity and activating function on the metal surface or its salts, such as phosphato-tungstic acid, molybdophosphoric acid, silicotungstic acid, silicomolybdic acid, germanium-tungstic acid and copper, chrome, nickel and zinc transition metal substituted heteropolyacid are used as phosphorization accelerating agent, and adding it into the existent various phosphorizing liquors to quickly promote phosphorization reaction. The phosphorizing liquor in which the accelerating agent is added can be used for making phosphate treatment of general carbon steel, cold-and hot-rolled plates at 20-50 deg.C by adopting soaking or spraying mode, can quickly form film, has no settlement, and the formed phosphate film is uniform and compact, and possesses strong rust-proofing property.