Title: A method and a device for pickling of stainless steel
Application Number: 94192557 Application Date: 1994.05.04
Publication Number: 1125966 Publication Date: 1996.07.03
Approval Pub. Date: 1999.01.20 Granted Pub. Date: 1999.01.20
International Classifi-cation: C25F1/06
Applicant(s) Name: Swedish Pickling AB Address:
Inventor(s) Name: Conny Groenlund;Kaj Groenlund
Attorney & Agent: LU XINHUA WEI JINXI
Abstract:
    The invention relates to a method and a device for performing the method, viz. remove oxide layers, chromium depleted zones and the like in pickling of metal, in the first place stainless steel (1) in the form of plates or strips, which continuously pass through an electrolyte bath. The pickling is performed in an electrochemical way. The steel strip passes through an electrolyte circulating in a closed system, where the electrolyte is circulated at a high speed through two crevices (15, 16) formed between a first electrode (4), chemically resistant to the electrolyte, and the steel (1), respectively between the steel (1) and a second electrode (5), chemically resistant to the electrolyte, while a controllable electrical current is passed from the first electrode (4) through the electrolyte, through the metal (1) present in the electrolyte bath, in the thickness direction of said metal, through the electrolyte and to the second electrode (5).
Time: 5