Journal of Surface Science and Engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
권호 표지

The effects of Si-content on the corrosion rate of Cu-al alloys

동일 알루미늄 합금의 탄식속도에 미치는 규소의 영향

  • Ham, Dong-Ha (College of Engineering, Seoul National University) ;
  • Kang, Tak (College of Engineering, Seoul National University) ;
  • Kang, Choon-Sik (College of Engineering, Seoul National University)
  • 함동하 (서울대학교 대학원 금속공학과) ;
  • 강탁 (서울대학교 공과대학) ;
  • 강춘식 (서울대학교 공과대학)
  • Published : 1981.03.01
Download PDF
⟨ Previous Next ⟩

Abstract

The effects of silicon content on the corrosion rates of Cu-7wt% Al alloys have been investigated by the use of electrochemical methods. The corrosion current densities of the alloys are decreased with the addition of Si up to 2wt%, and the slightly increased at 2.5%Si. This increased corrosion rates are attributed to the precipitation of more anodic gamma-2 phase. The X-ray diffraction tests reveal the dealuminumification of these alloys and mixtures of CuCl and Al2O3 formed on the surface of the specimens, which are considered to passivate the alloys at noble potentials.

Keywords