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Corrosion resistant coated fuel cell bipolar plate with filled-in fine scale porosities and method of making the same

  • US 6,649,031 B1
  • Filed: 10/08/1999
  • Issued: 11/18/2003
  • Est. Priority Date: 10/08/1999
  • Status: Expired due to Term
First Claim
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1. A method of corrosion passivation of a bipolar plate for a fuel cell, the method comprising the steps of:

  • providing a metal fuel cell bipolar plate;

    providing an electrically conductive corrosion resistant coating over the metal fuel cell bipolar plate, the electrically conductive corrosion resistant coating including a top surface and porosities; and

    providing an overcoating over the electrically conductive corrosion resistant coating, the overcoating sealing some or all of the porosities at the top surface of the electrically conductive corrosion resistant coating.

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