Aluminium and aluminium alloy having corrosion-resistant protective layer, and methods of making such a layer
US5055356A · kind A · utility
13Cited by
6References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 28, 1989 |
| Grant date | Oct 8, 1991 |
| Priority date | — |
| Expiry date | Jul 28, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31678
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A body, particularly a thin layer, of aluminium or aluminium alloy is given a corrosion-resistant bright dense barrier-type protective layer. The layer has a thickness in the range 50 to 500 nm and comprises aluminium oxide and a chelate complex of aluminium and at least one organic chelating compound. The layer is formed by contacting the surface with a solution of the chelating compound of pH 2 to 7 and, optionally, performing oxidative electrolysis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.