Process for electrolytically coloring aluminum and aluminum alloys
US4042471A · kind A · utility
2Cited by
3References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 3, 1976 |
| Grant date | Aug 16, 1977 |
| Priority date | — |
| Expiry date | Mar 3, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D11/22
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Aluminum or aluminum alloy is first anodized to form an oxide film thereon. With the pores in this oxide film unsealed, the basis metal is then electrolyzed in an electrolytic solution containing at least two metallic salts and a strongly reducing compound, by use of alternating current at potentials not more than about 15 volts.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.