Method for increasing the corrosion resistance of aluminum and aluminum alloys
US5266356A · kind A · utility
11Cited by
5References
6Claims
0Family size
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Key dates
| Filing date | Jun 21, 1991 |
| Grant date | Nov 30, 1993 |
| Priority date | — |
| Expiry date | Jun 21, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C22/74
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Aluminum and aluminum alloys are protected from corrosion by immersion in an alkaline lithium or alkaline magnesium salt solution. Immersion in the salt solution causes the formation of a protective film on the surface of the aluminum or aluminum alloy which includes hydrotalcite compounds. A post film formation heat treatment significantly improves the corrosion resistance of the protective film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.