고분자 전해질 연료전지 금속분리판용 316L 스테인리스강의 양극작동조건에서 염화물 농도에 따른 부식 특성
Corrosion Characteristics of 316L Stainless Steel with Chloride Concentrations in Cathode Operating Conditions of Metallic Bipolar Plate for PEMFC
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초록
The interest in eco-friendly energy is increasing, and polymer electrolyte membrane fuel cell (PEMFC) isattracting attention as alternative power sources. Research on metallic bipolar plates, a fuel cell component,is being actively conducted. However, since the operating conditions of PEMFC, in which sulfuricacid (H2SO4) and hydrofluoric acid (HF) are mixed, are strong acidity, the durability of the metallic bipolarplate is very important. In this research, the electrochemical characteristics and corrosion damagebehavior of 316L stainless steel, a material for metallic bipolar plates, were analyzed through potentiostatic corrosiontests with test times and chloride concentrations. As the test times and chloride concentrations increased, thecurrent density and corrosion damage increased. As a result of observation with scanning electron microscope(SEM) and 3D microscope, both the depth and width of pitting corrosion increased with increases in testtimes and chloride concentrations. In particular, the pitting corrosion damage depth at test conditions of 6 hours and1000 ppm chloride increased the most. The growth of the pitting corrosion damage was not directly proportional totime and increased significantly after a certain period.
Abstract
The interest in eco-friendly energy is increasing, and polymer electrolyte membrane fuel cell (PEMFC) isattracting attention as alternative power sources. Research on metallic bipolar plates, a fuel cell component,is being actively conducted. However, since the operating conditions of PEMFC, in which sulfuricacid (H2SO4) and hydrofluoric acid (HF) are mixed, are strong acidity, the durability of the metallic bipolarplate is very important. In this research, the electrochemical characteristics and corrosion damagebehavior of 316L stainless steel, a material for metallic bipolar plates, were analyzed through potentiostatic corrosiontests with test times and chloride concentrations. As the test times and chloride concentrations increased, thecurrent density and corrosion damage increased. As a result of observation with scanning electron microscope(SEM) and 3D microscope, both the depth and width of pitting corrosion increased with increases in testtimes and chloride concentrations. In particular, the pitting corrosion damage depth at test conditions of 6 hours and1000 ppm chloride increased the most. The growth of the pitting corrosion damage was not directly proportional totime and increased significantly after a certain period.
참고문헌 (25)
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