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Arc ion plating(AIP) is applied to form Ti/(Ti,Cr)N/Cr N multilayer coating on the surface of 316 L stainless steel(SS316L) as bipolar plates for proton exchange membrane fuel cells(PEMFCs). The characterizations of the coating are analyzed by scanning electron microscopy(SEM) and X-ray diffraction(XRD). Interfacial contact resistance(ICR) between the coated sample and carbon paper is 4.9 m cm~2 under 150 N/cm~2,which is much lower than that of the SS316 L substrate. Potentiodynamic and potentiostatic tests are performed in the simulated PEMFC working conditions to investigate the corrosion behaviors of the coated sample. Superior anticorrosion performance is observed for the coated sample, whose corrosion current density is 0.12 μA/cm2. Surface morphology results after corrosion tests indicate that the substrate is well protected by the multilayer coating. Performances of the single cell with the multilayer coated SS316 L bipolar plate are improved significantly compared with that of the cell with the uncoated SS316 L bipolar plate, presenting a great potential for PEMFC application.
The characterizations of Ti / (Ti, Cr) N / Cr N multilayer coating on the surface of 316 L stainless steel (SS316L) as bipolar plates for proton exchange membrane fuel cells (PEMFCs) the coating is analyzed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Interfacial contact resistance (ICR) between coated sample and carbon paper is 4.9 m cm ~ 2 under 150 N / cm ~ 2, which is much Potentiodynamic and potentiostatic tests are performed in the simulated PEMFC working conditions to investigate the corrosion behaviors of the coated sample. Superior anticorrosion performance is observed for the coated sample, whose corrosion current density is 0.12 μA / cm2 . Surface morphology results after corrosion tests indicate that the substrate is well protected by the multilayer coating. Performances of the single cell with the multilayer coated SS316 L bipolar plates are improved significantly with that of the cell with the uncoated SS316 L bipolar plate, presenting a great potential for PEMFC application.