The enhanced passivation of 316L stainless steel in a simulated fuel cell environment by surface plating with palladium |
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| Affiliation: | 1. Poznan University of Economics and Business, Al. Niepodleglosci 10, 61-875 Poznan, Poland;2. Saint Petersburg Institute for Machine Sciences, The Russian Academy of Sciences, Saint Petersburg 199178, Russia;1. Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China;2. School of Materials Science and Engineering, University of Science and Technology of China, Hefei, 230026, China;3. Department of Materials Science & Metallurgy, University of Cambridge, Cambridge, CB3 0FS, UK |
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| Abstract: | A thin layer of Pd deposition on the surface significantly improves the corrosion resistance of 316L stainless steel in 0.5 mol L?1 H2SO4 + 2 ppm F? solution at 80 °C. Compared with the air-formed passive film, the passive film formed in the stainless steel/Pd couple contains more Cr, Cr(OH)3 and Fe3O4 and less point defects, which provides better protection to the stainless steel substrate. The interfacial contact resistance of the stainless steel surface is also decreased. The Pd plated stainless steel is a potential material for bipolar plates in proton exchange membrane (PEM) fuel cells. |
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