Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Effects of Temperature and Chloride Concentration on Electrochemical Characteristics and Damage Behavior of 316L Stainless Steel for PEMFC Metallic Bipolar Plate

PEMFC 금속 분리판용 316L 스테인리스강의 전기화학적 특성 및 손상 거동에 미치는 온도 및 염화물 농도의 영향

  • Shin, Dong-Ho (Graduate school, Mokpo national maritime university) ;
  • Kim, Seong-Jong (Division of marine engineering, Mokpo national maritime university)
  • 신동호 (목포해양대학교대학원) ;
  • 김성종 (목포해양대학교기관시스템공학부)
  • Received : 2022.08.17
  • Accepted : 2022.08.25
  • Published : 2022.09.02
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Abstract

Interest in polymer electrolyte fuel cell is growing to replace fossil fuels. In particular, in order to reduce the cost and volume of the fuel cell, research on a metallic bipolar plate is being actively conducted. In this research, investigated the effects of temperature and chloride concentration on the electrochemical characteristics and damage behavior of 316L stainless steel in an accelerated solution simulating the cathodic operating condition of PEMFC(Polymer electrolyte membrane fuel cell). As a result of the experiments, the corrosion current density, damage size, and surface roughness increased as the temperature and chloride concentration increased. In particular, the temperature had a significant effect on the stability of the oxide film of 316L stainless steel. In addition, it was described that the growth of the pit was affected by the chloride concentration rather than the temperature. As a result of calculating the corrosion tendency to compare the pitting corrosion rate and the uniform corrosion rate, the uniform corrosion tendency became larger as the temperature increased. And the effects of chloride concentration on corrosion tendency was different according to temperature.

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References

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