METHOD FOR ELECTROCHEMICAL PHOSPHATING OF METAL SURFACES, PARTICULARLY STAINLESS STEEL, AND APPLICATION OF AN AQUEOUS PHOSPHATING SOLUTION FOR SUCH A METHOD

摘要

A kind of method,For electrochemical phosphating metal surface, especially stainless steel, in conjunction with the cold forming method of metal works, provide after the workpiece of cold forming and lubricant phosphatization,Being related to electrochemical phosphating by cathodic process application aqueous phosphate solution includes: 0.5 to 100 grams of Ca2+/1,0.5 to 100 grams of Zn2+/1,5 to 100 grams of PO 4? 3-/1,0 to 100 gram of NO 3? / 1,0 to 100 gram of ClO 3? / 1 and 0 to 50 gram of F? or Cl-/1, by the temperature of the solution at 0 and 95 °C, the pH value of solution is 0.Between 5 and 5, current density is 0.When 1 and 250 2. This provides a good lubricant effect, good that metal surface, particularly stainless steel are made, and more favorable quality is than common phosphatization.