Abstract
Metal bipolar plates are prone to corrosion in the acid environment of fuel cells. It is necessary to deposit protective films with excellent corrosion resistance on the surface of metal bipolar plates. In this study, LaB6- doped carbon films with strong corrosion resistance were deposited on 316L stainless steel by magnetron sputtering ion plating using graphite composite targets with different contents of LaB6. The effects of bias voltage and content adjusting on the corrosion resistance of obtained films were investigated. The results show that doping LaB6 is benefit to adjust the structure and improve the corrosion resistance of a -C matrix. The carbon film with moderate LaB6 doping possesses compact structure with no columnar defects and exhibits excellent corrosion resistance, providing good protection for 316L stainless steel bipolar plates.
Keywords Plus：FUEL-CELLS，CORROSION，MICROSTRUCTURE，DEGRADATION，DURABILITY，COATINGS，PRESSURE，IMPACT
Published in INTERNATIONAL JOURNAL OF HYDROGEN ENERGY，Volume58，10.1016/j.ijhydene.2024.01.021；MAR 8 2024