Process for treating aluminum and aluminum alloy surfaces
US4149912A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1977 |
| Grant date | Apr 17, 1979 |
| Priority date | — |
| Expiry date | Jul 11, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C8/16
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A process for providing a priming layer of aluminum hydroxyoxide on aluminum and aluminum alloy surfaces comprising treating the surface with a chemical reagent having a solvent action for the naturally-occurring oxides which form on such surfaces until said oxides are dissolved, and contacting said surfaces with steam while a film of the reagent is still present on the metal surface. The priming layer provides for excellent adhesion of subsequent organic coatings to the metal surface. PAC BACKGROUND OF THE INVENTION The present invention relates to the formation of priming films on aluminum and aluminum alloy surfaces so as to render such surfaces permanently receptive to subsequent organic coatings. Because of the weight of aluminum and its corrosion characteristics, aluminum and alloys therewith are being increasingly utilized in commercial, industrial and consumer areas in conjunction with organic coatings, e.g., aluminum siding for dwellings, containers for food and beverages, automobile parts, etc. Especially in the food container area, use of aluminum alloys has significantly increased because such materials have the high strength necessary for can formation and handling pro…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.