Journal of Power System Engineering (동력기계공학회지)

The Korean Society for Power System Engineering (한국동력기계공학회)
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Polarization Characteristics of Heat-treated Ni-based Self-flux Alloy Coating in Alkaline Solution

후열처리한 니켈기 자융성 합금 코팅의 알칼리 용액에서의 분극특성

  • Kim, Tea-Yong (Graduate School of Pukyong National University) ;
  • Kim, Jea-Dong (Institute of Marine Industry Gyeongsang National University) ;
  • Kim, Yeong-Sik (Department of Mechanical & Automotive Engineering, Pukyong National University)
  • 김태용 (부경대학교 대학원) ;
  • 김재동 (경상대학교 해양산업연구소) ;
  • 김영식 (부경대학교 기계자동차공학과)
  • Received : 2013.07.16
  • Accepted : 2014.03.04
  • Published : 2014.04.30
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Abstract

The purpose of this paper is to investigate polarization characteristics of heat-treated Ni-based self-flux alloy coating in alkaline solution. Ni-based self-flux alloy powder was sprayed to a steel substrate using flame spray process, and heat treatments were performed in a vacuum furnace at $800^{\circ}C$, $900^{\circ}C$, $1000^{\circ}C$ and $1100^{\circ}C$. After heat treatments, corrosion tests were carried out using potentiostat/galvanostat at solution with pH 8 and pH 13. Corrosion potential(Ecorr) and corrosion current density(Icorr) could be analyzed from polarization curve. Anticorrosive effect of heat-treated coating at solution with pH 8 was relatively greater than at solution with pH 13. Heat-treated coating at $1100^{\circ}C$ showed the greatest anti-corrosion characteristics in alkaline solution.

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References

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