한국산학기술학회논문지 (Journal of the Korea Academia-Industrial cooperation Society)

  • 제15권1호
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  • Pages.32-38
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  • 2014
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  • 1975-4701(pISSN)
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  • 2288-4688(eISSN)
한국산학기술학회 (The Korea Academia-Industrial cooperation Society)
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해수용 열교환기 적용을 위한 열분사 코팅의 침지부식특성 연구

Study on the Immersion Corrosion Characteristics of Thermal Spray Coating for Sea Water Heat Exchanger

  • 허철 (한국해양과학기술원 선박해양플랜트연구소 해양CCS연구단) ;
  • 조맹익 (한국해양과학기술원 선박해양플랜트연구소 해양CCS연구단) ;
  • 권정태 (호서대학교 기계공학부) ;
  • 권영철 (선문대학교 기계공학과)
  • Huh, Cheol (Offshore CCS Research Unit, Korea Research Institute of Ships & Ocean Engineering, Korea Institute of Ocean Science and Technology) ;
  • Cho, Meang-Ik (Offshore CCS Research Unit, Korea Research Institute of Ships & Ocean Engineering, Korea Institute of Ocean Science and Technology) ;
  • Kwon, Jeong-Tae (School of Mechanical Engineering, Hoseo University) ;
  • Kwon, Young-Chul (Department of Mechanical Engineering, Sunmoon University)
  • 투고 : 2013.11.25
  • 심사 : 2014.01.09
  • 발행 : 2014.01.31
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초록

본 연구에서는 해수용 열교환기 적용을 위한 열분사 코팅의 침지부식 특성 및 열확산율을 조사하기 위해 실험이 수행되었다. 코팅은 아연과 알루미늄을 열분사 코팅한 뒤 실리콘 및 에폭시 수지를 추가 도포한 총 8개의 시편이며 이를 $70^{\circ}C$ 3.5%w NaCl 수용액에 2주간 침지하여 침지 전후의 부식특성 변화를 관찰하였다. 코팅의 부식특성 변화를 관찰하기 위하여 AC 임피던스 측정, SEM 촬영 등을 진행하였으며 레이저 확산법을 이용하여 침지 전후의 열확산율을 측정 및 비교하였다. 침지실험 결과로부터 실리콘 및 에폭시가 추가된 코팅 시편은 표면에 블리스터가 생성되지 않았으며 이에 실러 추가 코팅에 따른 내부식성 향상효과가 있는 것으로 확인되었다.

In the present study, immersion corrosion characteristics of Zn and Al thermal spray coating with sealer for the seawater heat exchanger are experimentally investigated. Total 8 coating types of Zn and Al thermal spray coating with silicone and epoxy sealer were tested with immersion corrosion testing in $80^{\circ}C$ 3.5%w NaCl solution and compared the corrosion characteristics between each coatings. To investigate the corrosion characteristics of the specimens, AC impedance, SEM, and thermal diffusivity were acquired and analyzed. As a result, on the surface of the specimens with silicone and epoxy sealer, blister did not occurred, so the sealers might be effective at increasing the corrosion resistance of the specimens immersed in the NaCl solution.

키워드

참고문헌

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