Journal of Welding and Joining

The Korean Welding and Joining Society (대한용접접합학회)
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Corrosion Assessment of Al/Fe Dissimilar Metal Joint

Al/Fe 이종금속 접합부의 부식특성

  • Kang, Minjung (Welding & Joining Research Group, Korea Institute of Industrial Technology) ;
  • Kim, Cheolhee (Welding & Joining Research Group, Korea Institute of Industrial Technology) ;
  • Kim, Junki (Welding & Joining Research Group, Korea Institute of Industrial Technology) ;
  • Kim, Dongcheol (Welding & Joining Research Group, Korea Institute of Industrial Technology) ;
  • Kim, Jonghoon (Welding & Joining Research Group, Korea Institute of Industrial Technology)
  • 강민정 (한국생산기술연구원 용접접합연구실용화그룹) ;
  • 김철희 (한국생산기술연구원 용접접합연구실용화그룹) ;
  • 김준기 (한국생산기술연구원 용접접합연구실용화그룹) ;
  • 김동철 (한국생산기술연구원 용접접합연구실용화그룹) ;
  • 김종훈 (한국생산기술연구원 용접접합연구실용화그룹)
  • Received : 2014.06.30
  • Accepted : 2014.08.12
  • Published : 2014.08.31
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Abstract

The use of light-weight Al alloys in the automotive industry is increasing to meet requirements for fuel efficiency and emission reduction. Joining Al alloy to the conventional steel sheet is also very important issue with the increased use of Al alloy, and several joining processes have been introduced to enhance joining strength between dissimilar metals. This paper deals with a galvanic corrosion in the dissimilar metal joining. Salt spray tests up to 2000 hours were conducted on a self-piercing rivet, spot welded, adhesive bonded and weld-bonded joints, and cross-sections and tensile shear strength according the salt spray duration were analyzed at every 500-hour. Self-piercing rivet joint had relative low initial strength but the joint strength did not change regardless of the salt spray duration. The strength of other joints (spot welded, adhesive bonded and weld-bonded joints) decreased with the increase of salt spray duration and the corrosion behaviour of each joint was discussed.

Keywords

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