Treatment of aluminium or aluminium alloys
US5954893A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 1997 |
| Grant date | Sep 21, 1999 |
| Priority date | — |
| Expiry date | May 22, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/12792
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for treating the surface or surfaces of an aluminium or aluminium alloy containing substrate to confer corrosion resistance in which a porous layer is created on the surface or surfaces and then the surface or surfaces are treated with a solution or gel comprising a metavanadate ion, and further treated with a solution comprising a metal ion selected to coprecipitate with the metavanadate ion to form a sparingly soluble compound within the pores of the porous layer. A corrosion resistant coating for aluminium or aluminium alloy comprising a porous surface layer containing within the pores a deposit of a sparingly soluble metal metavanadate. The porous layer may be an oxide layer produced for example by acid anodising.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.