Corrosion Science and Technology

The Corrosion Science Society of Korea (한국부식방식학회)
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Investigation on Electrochemical Characteristics of Battery Housing Material for Electric Vehicles in Solution Simulating an Acid Rain Environment with Chloride Concentrations

산성비 환경을 모사한 수용액에서 염화물 농도에 따른 전기자동차 배터리 하우징용 재료의 전기화학적 특성 연구

  • Shin, Dong-Ho (Graduate school, Mokpo national maritime university) ;
  • Kim, Seong-Jong (Division of marine engineering, Mokpo national maritime university)
  • 신동호 (목포해양대학교 대학원) ;
  • 김성종 (목포해양대학교 기관시스템공학부)
  • Received : 2022.04.20
  • Accepted : 2022.04.26
  • Published : 2022.05.06
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Abstract

Electrochemical characteristics and damage behavior of 6061-T6 aluminum alloy used as a battery housing material for electric vehicles were investigated in solution simulating the acid rain environment with chloride concentrations. Potentiodynamic polarization test was performed to analyze electrochemical characteristics. Damage behavior was analyzed through Tafel analysis, measurement of damage area, weight loss, and surface observation. Results described that corrosion current density was increased rapidly when chloride concentration excceded 600 PPM, and it was increased about 7.7 times in the case of 1000 PPM compared with 0 PPM. Potentiodynamic polarization experiment revealed that corrosion damage area and mass loss of specimen increased with chloride concentrations. When chloride concentration was further increased, the corrosion damage area extended to the entire surface. To determine damage tendency of pitting corrosion according to chloride concentration, the ratio of damage depth to width was calculated. It was found that the damage tendency decreased with chloride concentrations. Thus, 6061-T6 aluminum alloy damage becomes larger in the width direction than in the depth direction when a small amount of chloride is contained in an acid rain environment.

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References

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