Corrosion resistant PEM fuel cell
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United States of America Patent
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Apr 29, 1997
Grant Date -
N/A
app pub date -
Dec 22, 1995
filing date -
Dec 22, 1995
priority date (Note) -
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Abstract
The present invention contemplates a PEM fuel cell having electrical contact elements (including bipolar plates/septums) comprising a titanium nitride coated light weight metal (e.g., Al or Ti) core, having a passivating, protective metal layer intermediate the core and the titanium nitride. The protective layer forms a barrier to further oxidation/corrosion when exposed to the fuel cell's operating environment. Stainless steels rich in CR, Ni, and Mo are particularly effective protective interlayers.
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