Electrocoating process for mixed-metal automotive bodies-in-white
US8187439B2 · kind B2 · utility
5Cited by
5References
12Claims
0Family size
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Key dates
| Filing date | Aug 5, 2009 |
| Grant date | May 29, 2012 |
| Priority date | — |
| Expiry date | Jul 23, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D13/22
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Mixed-metal automotive vehicle bodies-in-white comprising ferrous metal surfaces, zinc surfaces, aluminum alloy surfaces, and magnesium alloy surfaces are cleaned and immersed in an aqueous bath comprising an adhesion promoter and an aqueous electrocoat bath (the adhesion promoter may be in the electrocoat bath. The adhesion promoter, which may be a cerium salt, is selected to react with each metal in the body surfaces to form an oxide layer that provides corrosion resistance for the surface and adherence for the deposited polymeric paint coating. The body is cathodic in the electrocoat deposition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.