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Fe-Ni-Cr alloy is a potential material as the bipolar plate for proton exchange membrane fuel cell (PEMFC).However,its interfacial contact resistance is too high and the corrosion resistance is too low to survive in the hostile environment.A novel method by preparing the composite coating layers by in-situ method is reported in this manuscript.The plate is first treated in acid solution,and then is heat treated in vacuum at low temperature,at last is treated by electrochemical method.