Fig. 7 shows the potentiostatic test results of bare aluminum,
Sample 1 and Sample 2 under the same conditions. The bare
aluminum showed a continuous increasing behavior while the
composite coated samples showed steady saturated values within
3 h starting with the values of the polarization curves under both
anodic and cathodic conditions. This indicates that the composite
can stabilize the surface of a bipolar plate in a corrosive environment
during PEM fuel cell operation. The addition of an interfacial
layer does not affect the corrosion behavior.
F