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Method of making an electrically conductive element for use in a fuel cell
   
Document Number
US Patent 7396559
Issued Date
July 8, 2008
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Abstract
The present invention provides an electrically conductive element for a proton exchange membrane fuel cell having low electrical contact resistance and high corrosion resistance. The conductive element comprises a corrosion susceptible metal substrate with a surface, which is preferably treated to activate the surface (i.e., to remove a passivation layer of oxides from the surface) with an acidic treatment solution. The treated surface is then overlaid with an electrically conductive, corrosion-resistant, protective coating to protect the substrate re-forming a passivation layer while exposed to the corrosive environment of the fuel cell. The present invention also provides methods of preparing an electrically conductive element to have low electrical contact resistance and high corrosion resistance.
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Number of Claims:
19
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Published
July 8, 2008
Application Number
10/638,851
Filed
August 11, 2003
US Classification
427/115   427/299 427/307 427/322
Int'l Classification
B05D   5/12   (20060101)   B05D   3/02   (20060101)  
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USPTO Field of Search
427/299   427/307   427/327  
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