Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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Anti-Corrosion Characteristics of WC-based Alloy Coatings Fabricated by HVOF Process - Polarization Characteristics in Alkaline Solution -

HVOF 용사법에 의해 제조된 WC계 합금 코팅층의 방식특성(II) - 알칼리 용액에서의 분극특성 -

  • Kim, Tae-Yong (Graduate School of Pukyong National University) ;
  • Kim, Yeong-Sik (Department of Mechanical & Automotive Engineering, Pukyong National University) ;
  • Kim, Jae-Dong (Institute of Marine Industry, Gyeongsang National University)
  • 김태용 (부경대학교 대학원) ;
  • 김영식 (부경대학교 기계자동차공학과) ;
  • 김재동 (경상대학교 해양산업연구소)
  • Received : 2014.08.13
  • Accepted : 2014.10.10
  • Published : 2014.12.31
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Abstract

The purpose of this paper is to investigate polarization characteristics of WC-based alloy coatings in alkaline solution. The coatings were fabricated with WC-CrC-Ni, WC-Co-Cr and WC-Co composite powders by HVOF process. Corrosion tests of coatings and substrate were carried out using potentiostat/galvanostat at solution with pH 8 and pH 13. Corrosion potential(Ecorr) and corrosion current density(Icorr) could be studied from polarization curve, and corrosion behavior was analyzed by SEM and EDS. WC-Co-Cr coating and WC-CrC-Ni coating showed more favorable anti-corrosion characteristics than WC-Co coating and substrate at solution with pH 8 and pH 13.

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References

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