METHOD FOR PICKLING HIGH CHROME FERRITIC STAINLESS STEEL

摘要

PURPOSE: An acid cleaning method of a high chrome ferritic stainless steel is provided to minimize the product defect of a stainless steel plate by improving the gloss of the steel sheet surface. CONSTITUTION: The acid cleaning method of the high chrome ferritic stainless steel comprises a step of pickling in a sulfuric acid electrolytic cell. The applied current of the sulfuric acid electrolytic cell to the maximum anode is 4.0A / dm^2 or greater. The concentration of the sulfuric acid electrolytic cell is 20~200g/l. The temperature of the solution of the sulfuric acid electrolytic cell is 20~70°C. The steel sheet comprises Cr 18~20 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.