Method of coloring of anodized aluminum and aluminum alloys by electrolytic treatment in the metal salt solutions
US3963591A · kind A · utility
1Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1975 |
| Grant date | Jun 15, 1976 |
| Priority date | — |
| Expiry date | Aug 25, 1995 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D11/22
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The present invention relates to an improvement of the method for electrolytic coloring of anodically produced oxide layers on aluminum and its alloys, by electrolytic treatment in a metal salt (Ni, Co, Cu) solution. It is characterized in that one establishes in the coloring electrolyte a content of 0.02 to 0.75 grams copper per liter. The method permit uniform and reproductible coloring to be undertaken in a simple manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.