The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 20, 2003
Filed:
Jul. 13, 2001
Applicant:
Inventors:
Sandro Fortunati, Terni, IT;
Yoannis Demertzis, Milan, IT;
Stefano Trasatti, Milan, IT;
Paolo Giordani, Crema, IT;
Augusto Musso, Rome, IT;
Franco Mancia, Rome, IT;
Assignee:
Henkel Kommanditgesellschaft auf Aktien, Duesseldorf, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C30B 9/14 ; B01D 1/706 ;
U.S. Cl.
CPC ...
C30B 9/14 ; B01D 1/706 ;
Abstract
A process for electrolytic pickling of stainless steel of the ferritic, martensitic, austenitic and duplex series as well as superaustenitic and superferritic steels, nickel or Ni/Cr-based super alloys, and titanium and its alloys is provided. The process utilizes an electrolytic pickling solution containing H SO in a concentration of from 20 to 140 g/l and Fe ions in a concentration of from 15 to 80 g/l, the Fe ions being present a quantity corresponding to a Fe /Fe ratio of >1 and preferably >3.