Atmospheric Plasma Surface Modification on Stainless Steel Bipolar Plate in PEMFC |
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| Affiliation: | Liu Feng1,Li Hongxia1,2,Wang Qi1,Xin Yonglei1,Li Xiangbo1 1 Science and Technology on Marine Corrosion and Protection Laboratory,Luoyang Ship Material Research Institute,Qingdao 266101,China 2 College of Chemistry and Chemical Engineering,Ocean University of China,Qingdao 266100,China |
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| Abstract: | In this research,stainless steel bipolar plates for proton exchange membrane fuel cell(PEMFC)have been treated by an atmospheric plasma surface modification technology.The chemical composition and thickness of the oxide film formed by plasma are conducted to verify by Auger electron spectroscopy(AES).Pitting resistance,potentiodynamic polarization curves and electrochemical impedance spectroscopy(EIS)are measured to evaluate the corrosion mechanism and electrochemical properties.The results show that the treated plates have a much thicker oxide film which leads to higher pitting potential,improved corrosion rate,less and smaller pitting holes than those without treatment.The stable chemical and electrochemical properties of the treated stainless steel bipolar plate indicate the stabilization of cell performance and longer service life. |
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| Keywords: | stainless steel bipolar plate PEMFC plasma pitting corrosion |
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