Low temperature sealing of anodized aluminum
US4045599A · kind A · utility
13Cited by
5References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1976 |
| Grant date | Aug 30, 1977 |
| Priority date | — |
| Expiry date | Jan 15, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D11/246
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method of forming a low temperature seal on anodized aluminum and removing sealing smudge therefrom comprises treating anodized aluminum with an aqueous sealing solution at a temperature of at least 140.degree. F. and containing 2 to 6 g/l of hydrolyzable metallic salt, 5 to 20 ml/l of an ethanolamine and 50 to 2000 mg/l soluble sulfate (SO.sub.4 .sup.=), and thereafter removing sealing smudge formed by this treatment with mineral acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.