Patent · US Active

Method for cathodic corrosion protection of chromium surfaces

US9441306B2 · kind B2 · utility

2Cited by

4References

13Claims

0Family size

Assignee

Atotech Deutschland GmbH & Co. KG · DE

Inventors

Christina Pfirrmann · Berlin, DE
Philip Hartmann · Berlin, DE
Philipp Wachter · Berlin, DE
Stefan Kretschmer · Berlin, DE

Key dates

Filing date	Jun 17, 2014
Grant date	Sep 13, 2016
Priority date	—
Expiry date	Jun 17, 2034

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC25D5/627
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

The present invention concerns a method for cathodic corrosion protection of a substrate having a chromium surface and at least one intermediate layer between the substrate and the chromium surface, selected from the group comprising nickel, nickel alloys, copper and copper alloys and wherein said chromium surface is contacted with an aqueous solution comprising at least one compound containing phosphorous while passing an electrical current through said substrate, at least one anode and the aqueous solution wherein said substrate serves as the cathode.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.