Proceedings of the Korean Institute of Surface Engineering Conference (한국표면공학회:학술대회논문집)

The Korean Institute of Surface Engineering (한국표면공학회)
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A comparative study on corrosion behavior of WC-CoCr and WC-CrC-Ni coatings by HVOF

  • 주윤곤 (창원대학교 나노신소재공학과) ;
  • 조재영 (창원대학교 나노신소재공학과) ;
  • 장시홍 (창원대학교 나노신소재공학과) ;
  • 송기오 (한국전력연구원) ;
  • 조동율 (창원대학교 나노신소재공학과) ;
  • 윤재홍 (창원대학교 나노신소재공학과)
  • Published : 2008.11.19
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Abstract

High velocity oxy-fuel (HVOF) thermal spraying coating has been used widely throughout the last 60 years mainly in defense, aerospace, and power plants. Recently this coating technique is considered as a promising candidate for the replacement of the traditional electrolytic hard chrome plating (EHC) which pollutes the environment and causes lung cancer by toxic hexa-valent $Cr^{6+}$. In this study, two kinds of cermet coatings, WC-CoCr and WC-CrC-Ni, are formed by HVOF spraying. The corrosion and electrochemical properties are evaluated by polarization tests in 3.5 wt% solutions.

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