METHOD FOR PICKLING MOLYBDENUM ADDED FERRITIC STAINLESS STEEL

摘要

PURPOSE: An acid cleaning method of molybdenum addition ferritic stainless steel is provided to minimize the product defect of a stainless steel plate by improving the surface gloss of the stainless steel plate. CONSTITUTION: The acid cleaning method of the molybdenum addition ferritic stainless steel comprises next steps. A steel sheet is pickled in a sulfuric acid electrolytic cell. The steel sheet comprises Mo 1~4%. The hydrofluoric acid concentration is 10~25g/l in the mixed acid immersion. The steel sheet comprises Cr 14~20 weight% and Si 0.5 weight%. The acid cleaning method operates a neutral salt electrolytic pickling process, a sulfuric acid electrolytic pickling process, a nitric acid electrolytic pickling process.