Journal of the Korean Institute of Gas (한국가스학회지)

The Korean Institute of GAS (한국가스학회)
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The Study on the Wear Corrosion Behavior of Induction Hardening High Strength Cast Iron in the pH Environments

고주파 열처리한 강인주철재의 마멸부식거동에 관한 연구

  • Park, Yun-Sik (Department of Die & Mold Technology, PolytechnicVI Daegu Campus) ;
  • Lim, Uh-Joh (School of Mechanical Engineering, Pukyong University) ;
  • Park, Dong-Gi (Department of Die & Mold Technology, PolytechnicVII Pusan Campus)
  • 박윤식 (한국폴리텍VI대학 대구캠퍼스 컴퓨터응용금형과) ;
  • 임우조 (부경대학교 기계공학부) ;
  • 박동기 (한국폴리텍VII대학 부산캠퍼스 컴퓨터응용금형과)
  • Published : 2008.12.30
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Abstract

This paper studies on the wear corrosion behavior of induction hardening high strength cast iron in the acidic environments. In a variety of pH solutions, wear corrosion behavior of GC 300 with a variety of contact pressures was investigated, and corrosion wear behavior after immersion test was considered. Also, electrochemical polarization test for GC 300 was carried out in various pH solutions. The main results are as following: In the strong acidic environment, wear corrosion rate of GC 300 appears highly and in the neutral environment is stable. Also, graphitic corrosion in the strong acidic environment occurs. The corrosion current density of GC 300 becomes high in a order of pH 1 > pH 2 > pH 4 > pH 6.5.

본 연구는 pH환경 중에서 고주파 열처리한 강인주철의 마멸 부식거동을 pH환경 중에서의 접촉압력에 따른 마멸부식거동, 침지 부식 후 부식마멸거동 및 전기화학적 부식거동에 대해 고찰하였다. 응축수의 pH가 낮아질수록 마멸부식율은 급격히 증가하고, 전기화학적 양극분극에 의한 강인주철의 부식양상은 중성에서 가늘고 긴 흑연의 편상조직이 나타나지만, 강산성 중에서는 흑연이탈 현상으로 표면이 거칠게 나타난다.

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