Corrosion resistant coated fuel cell bipolar plate with filled-in fine scale porosities and method of making the same
US6649031B1 · kind B1 · utility
25Cited by
20References
25Claims
0Family size
Assignee
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Key dates
| Filing date | Oct 8, 1999 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Oct 8, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A corrosion resistant coated fuel cell plate and method of making the same are embodied in a metal plate provided with a multilayered conductive coating and then with an overcoating which fills in fine scale porosities in the coating. In one preferred embodiment, the overcoating is amorphous graphite applied through a deposition process. In another preferred embodiment, the overcoating is a thin layer of oxide created by a chemical anodization process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.