Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
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Pitting Characteristics and Electrochemical Polarization Behaviors in Al-Cu-Si-Mg-Ag-Zr Alloys with Ageing

Al-Cu-Li-Mg-Ag-Zr합금의 시효에 따른 전기화학적 분극 거동과 공식특성

  • Min, B.C. (Dept. of Chemical Engineering, Hong-Ik University) ;
  • Chung, D.S. (Dept. of Metallurgical Engineering, Kyungpook National University) ;
  • Shon, T.W. (Dept. of Chemical Engineering, Hong-Ik University) ;
  • Cho, H.K. (Dept. of Metallurgical Engineering, Kyungpook National University)
  • 민병철 (홍익대학교 화학공학과) ;
  • 정동석 (경북대학교 금속공학과) ;
  • 손태원 (홍익대학교 화학공학과) ;
  • 조현기 (경북대학교 금속공학과)
  • Published : 1996.06.30
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Abstract

In this paper, we studied on both electrochemical polarization behaviors and pitting characteristics of ultra high strength Al-Cu-Li-Mg-Ag-Zr alloys(named C1 and C2) and 2090 alloy according to their treatments in the deaerated 3.5% NaCl, using by the potentiodynamic and the potentiostatic method, SEM micrograph and surface roughness including depth of pitting attack. With the cyclic polarization curves, the hysteresis of the C1 and C2 alloys appeared more remarkably than that of the 2090 alloy, because of precipitation microstructural difference between C1, C2 alloys and 2090 alloy. In the pitting experiments, the correlations between pitting growth and aging conditions were analyzed with the SEM micrograph and measurement of the pit depth.

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