ELECTROLYTIC PICKLING DEVICE FOR STAINLESS STEEL STRIP AND METHOD FOR ANNEALING AND PICKLING STAINLESS STEEL STRIP

• Main Authors: KIKUYAMA MASATAKE, YAMASHITA HIDEAKI, HAGIWARA TOSHIYA
• Format: Patent
• Language: English
• Published: 09.12.1997
• Edition: 6
• Subjects: APPARATUS THEREFOR; CHEMISTRY; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; METALLURGY; PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROMOBJECTS

PROBLEM TO BE SOLVED: To prevent a pattern defect called as an electrolytic pattern and caused by the ununiformity of electrolytic reaction and surface roughness, in a descaling device for a stainless steel strip, by constituting an electrolytic pickling cell of a cathode reaction cell and an anode reaction cell. SOLUTION: A stainless steel strip S subjected to annealing after cold rolling is subjected to pretreatment by molten salt and is thereafter introduced into a sulfuric acid electrolytic pickling cell 3 in which an anode reaction cell 10 and a cathode reaction cell 11 are separately made independent via an immersion roll 7. The steel strip S is first subjected to anode electrolysis via an anode 8, and is next subjected to cathode electrolysis via a cathode 9 to melt oxidized coating film under reduction and furthermore to activate the surface, and, at this time, the situation that, after the molten salt components adhered to the steel strip S are melted away in the reaction cell 10, they penetrate into the reaction cell 11 and check the melting of the oxidized coating film of the steel strip S under reduction can be prevented, by which the purpose can be attained.