Process for enhanced corrosion protection of anodized aluminum
US10174436B2 · kind B2 · utility
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40References
12Claims
0Family size
Assignee
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Key dates
| Filing date | Apr 6, 2016 |
| Grant date | Jan 8, 2019 |
| Priority date | — |
| Expiry date | Oct 29, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D11/243
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Processes for enhancing the corrosion resistance of anodized substrates are disclosed. In some embodiments, the process involves a second anodizing operation that targets an area of the substrate that is left inadequately protected by a first anodizing operation, and also targets defects that may have been arisen from intermediate processing operations such as laser-marking operations. The second anodizing operation can be conducted in a non-pore-forming electrolyte, and grows a thick protective barrier film over inadequately protected areas of the substrate, such as laser-marking treated areas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.