Method for producing a hard coating with high corrosion resistance on articles made of anodizable metals or alloys
US9644284B2 · kind B2 · utility
0Cited by
8References
22Claims
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Key dates
| Filing date | Jul 20, 2011 |
| Grant date | May 9, 2017 |
| Priority date | — |
| Expiry date | Jul 21, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D11/026
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A method for coating, a composition suitable for coating and a coating generated with the method of coating on anodizable metallic surfaces, especially on magnesium rich and aluminum rich surfaces, is disclosed. The composition is an aqueous solution including alkali metal or ammonium cations, phosphorus containing anions and silicon containing anions as well as optionally a peroxide or a compound of Al, Ti, Zr or any mixture of them. Preferably, the anodizing is carried out with a micro-arc oxidation process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.