Patent · US Active

Colored conversion layers on metal surfaces

US8293029B2 · kind B2 · utility

5Cited by

9References

18Claims

0Family size

Assignee

Henkel AG & Co. KGaA · DE

Inventors

Ulrich Jueptner · Hilden, DE
Joerg Becker · Bad Aibling, DE

Key dates

Filing date	Jan 31, 2006
Grant date	Oct 23, 2012
Priority date	—
Expiry date	Nov 18, 2027

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC23C22/44
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

Chromium-free conversion coating treatment solutions and processes for depositing a colored layer on zinc or galvanized steel, aluminum, magnesium or their alloys, are provided comprising: hexafluorotitanate and/or hexafluorozirconate ions; molybdate and/or tungstate ions; one or more chelating complex formers; and a copolymer of alkylene phosphonic or alkylene phosphinic acid and one or more unsaturated carboxylic acids.

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