Korean Journal of Metals and Materials (대한금속재료학회지)

The Korean Institute of Metals and Materials (대한금속재료학회)
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Effect of Drawing Rate on the Corrosion Behavior of Al Alloy Tubes for Automotive Cooling System

인발률에 따른 자동차 냉각 배관용 Al 합금의 부식 특성에 관한 연구

  • Park, Byung-Joon (Department of Advanced Materials Engineering, Sungkyunkwan University) ;
  • Kim, Jung-Gu (Department of Advanced Materials Engineering, Sungkyunkwan University) ;
  • Ahn, Seung-Ho (Corporative R&D Division Hyundai-Motor Co. & Kia Motors Corp.) ;
  • Kwak, Dong-Ho (Corporative R&D Division Hyundai-Motor Co. & Kia Motors Corp.) ;
  • Sohn, Hyun-Soo (Corporative R&D Division Hyundai-Motor Co. & Kia Motors Corp.)
  • 박병준 (성균관대학교 신소재공학과) ;
  • 김정구 (성균관대학교 신소재공학과) ;
  • 안승호 (현대.기아자동차 기술연구소) ;
  • 곽동호 (현대.기아자동차 기술연구소) ;
  • 손현수 (현대.기아자동차 기술연구소)
  • Received : 2008.03.10
  • Published : 2008.08.25
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Abstract

The effect of drawing rate on the electrochemical properties of 3003 Al alloys in 5 wt.% NaCl solution was investigated by electrochemical techniques (potentiodynamic polarization test, potentiostatic polarization test, electrochemical impedance spectroscopy (EIS)) and surface analyses (OM, SEM, EDS). Four kinds of automotive pipe materials were prepared (raw material, drawing rate = 5, 10, 15%). As the drawing rate of Al alloy tube increased, the pitting corrosion resistance increased due to the enrichment of Al oxides on the surface.

Keywords

Acknowledgement

Supported by : 현대.기아 자동차

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