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:
Nov. 11, 2003
Filed:
Nov. 28, 2001
Applicant:
Inventors:
Jan-Willem Brouwer, Willich, DE;
Peter Kuhm, Hilden, DE;
Assignee:
Henkel Kommanditgesellschaft auf Aktien, Duesseldorf, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23C 2/207 ;
U.S. Cl.
CPC ...
C23C 2/207 ;
Abstract
A process for post-passivation of a phosphated metal surface, characterized in that the phosphated metal surface is treated with an aqueous post-passivation solution which contains from 50 to 500 mg/l of nickel ions and from 200 to 1500 mg/l of phosphate ions. Rinsing water arising which contains constituents of the post-passivation solution may be processed by nanofiltration or reverse osmosis, the retentate being transferred into the phosphating bath, thereby closing the Ni circuit. The post-passivation solution preferably additionally contains a phosphating accelerator.