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:
Sep. 06, 2016
Filed:
Jan. 07, 2014
Applicant:
Atotech Deutschland Gmbh, Berlin, DE;
Inventors:
Björn Dingwerth, Langenfeld, DE;
Mike Krüger, Griesheim, DE;
Assignee:
Atotech Deutschland GmbH, Berlin, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23C 28/00 (2006.01); C25D 5/10 (2006.01); C25D 3/56 (2006.01); C25D 5/48 (2006.01); C23C 22/83 (2006.01); C25D 5/14 (2006.01);
U.S. Cl.
CPC ...
C25D 5/10 (2013.01); C23C 22/83 (2013.01); C25D 3/565 (2013.01); C25D 5/48 (2013.01); C23C 2222/10 (2013.01); C25D 5/14 (2013.01);
Abstract
The present invention relates to a process for corrosion protection of an iron-containing substrate wherein a first zinc-nickel alloy layer, a second zinc-nickel alloy layer and a black passivate layer are deposited onto the substrate. The nickel concentration in the second zinc-nickel alloy layer is higher than the nickel concentration in the first zinc-nickel alloy layer. The substrate surface obtained is homogenously black with an appealing decorative appearance and both resistance against white rust and red rust are improved.