FUEL CELL FLOW FIELD HAVING METAL BIPOLAR PLATES

摘要

A bipolar plate (30, 30') for use in a fuel cell (12, 14) includes a first metal layer (40a) having a first corrosion potential and a second metal layer (40b) that tends to grow an oxide layer (42, 42') during operation of the fuel cell (12, 14). The second metal layer (40b) includes a second corrosion potential such that there is a corrosion potential gradient between the first metal layer (40a) and the second metal layer (40b) that resists growth of the oxide layer (42, 42').