C/CrN multilayer coating for polymer electrolyte membrane fuel cell metallic bipolar plates

► C/CrN multilayer coatings with dense structure and high percentage of sp2 bond are deposited on SS316L. ► C/CrN multilayer coatings exhibit superior surface conductivity that is even better than that of graphite. ► Electrochemical results disclose that the C/CrN multilayer coatings have excellent corrosion resistance.