Method for the surface treatment of parts made of an aluminum or magnesium alloy
US9879347B2 · kind B2 · utility
4Cited by
4References
32Claims
0Family size
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Key dates
| Filing date | Feb 11, 2013 |
| Grant date | Jan 30, 2018 |
| Priority date | — |
| Expiry date | Oct 9, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC23C2222/10
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for surface treatment of a part made of aluminum, magnesium, or one of the alloys thereof, to protect the part from corrosion. The method comprises consecutively immersing the part in a first aqueous bath containing a corrosion-inhibiting metal salt and an oxidizing compound, and a second aqueous bath containing an oxidizing compound and a corrosion-inhibiting rare-earth salt. The method can be carried out for the chemical conversion of aluminum or the alloys thereof, and of magnesium or the alloys thereof, on parts that have not been previously treated, or after anodizing the part to seal the anodic layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.