Electrochemical study on the effect of hydrogen on the passive film of selective laser melted 316L stainless steel in a proton exchange membrane water electrolyzer environment |
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| Affiliation: | 1. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China;2. National Materials Corrosion and Protection Data Center, Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing, 100083, China;3. School of Materials Science and Engineering, Beijing Institute of Technology, Beijing, 100081, China;1. Indo-Korea Science and Technology Center (IKST), Jakkur, Bengaluru 560065, India;2. Electronic Materials Research Center, KIST, Seoul 136-791, South Korea;3. Center for Energy Materials Research, Korea Institute of Science and Technology, Seoul 02792, Seoul, Republic of Korea;1. Ufa State Petroleum Technological University, Ufa, 450064, Russia;2. Department of Petroleum Engineering, Shahid Bahonar University of Kerman, Kerman, Iran;3. Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran;4. College of Engineering and Technology, American University of the Middle East, Kuwait;5. State Key Laboratory of Petroleum Resources and Prospecting, China University of Petroleum (Beijing), Beijing, China;6. Department of Chemical Engineering, McGill University, Montreal, QC H3A 0C5, Canada |
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| Abstract: | The effect of hydrogen on the passivation behavior and electrochemical characteristics of selective laser melted (SLMed) 316L stainless steel in a simulated anode environment for a proton exchange membrane water electrolyzer (PEMWE) was studied. The results indicate that hydrogen charged into the sample increased the ratio of superficial Fe2+/Fe3+ and OH−/O2−, increased the concentration of point defects, reduced the film thickness, and weakened its protective effect. The film near 0.6 VSCE showed n-type semiconductor behavior. Hydrogen charging resulted in a higher defect density and thinner space charge layer in the film, which promoted the invasion of aggressive ions. |
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| Keywords: | Austenitic stainless steel Hydrogen charging Passive film Selective laser melting Bipolar plate |
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