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

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Experimental Study on Corrosion and Thermal Conductivity Characteristics of Thermal Spray Coating for Sea Water Heat Exchanger

해수용 열교환기 적용을 위한 열분사 코팅의 부식 및 열전도 특성에 관한 실험적 연구

  • Cho, Meang-Ik (Offshore CCS Research Unit, Maritime & Ocean Engineering Research Institute, Korea Institute of Ocean Science and Technology) ;
  • Huh, Cheol (Offshore CCS Research Unit, Maritime & Ocean Engineering Research Institute, Korea Institute of Ocean Science and Technology) ;
  • Kwon, Young-Chul (Department of Mechanical Engineering, Sunmoon University) ;
  • Kwon, Jeong-Tae (School of Mechanical Engineering, Hoseo University)
  • 조맹익 (한국해양과학기술원 선박해양플랜트연구소 해양CCS연구단) ;
  • 허철 (한국해양과학기술원 선박해양플랜트연구소 해양CCS연구단) ;
  • 권영철 (선문대학교 기계공학과) ;
  • 권정태 (호서대학교 기계공학부)
  • Received : 2013.11.01
  • Accepted : 2013.12.05
  • Published : 2013.12.31
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Abstract

In the present study, the characteristics of corrosion and thermal conductivity of thermal spray coatings for seawater heat exchangers were examined experimentally. The coating types of theZn and Al thermal spray coatings with additional epoxy and silicone sealers were tested. To examine the corrosion characteristics of the thermal spray coating, the cyclic voltamogram curve was measured followed by SEM imaging for surface characterization. The laser flash method was usedto measure the thermal conductivity of the specimen. The conductivity test results showed that thermal conductivity decreased by3 ~ 4% with the silicone sealer and decreased by 70 ~ 75% with the epoxy sealer.

본 연구에서는 해수용 열교환기 적용을 위한 열분사코팅의 종류에 따른 부식특성 및 열전도 성능을 조사하기 위해 실험이 수행되었다. 코팅은 아연과 알루미늄을 열분사코팅한 뒤 실리콘 및 에폭시 수지를 추가 도포한 시편을 선정하였다. 코팅의 부식특성 변화를 관찰하기 위하여 사이클릭 선도변화 측정 및 SEM촬영을 이용하였다. 시편의 열전도 성능을 측정하기 위해서 레이저 확산법을 이용하여 열전도도를 비교하였으며 추가도포를 실리콘으로 한 경우 3 ~ 4% 에폭시로 한 경우 70 ~ 75%의 열전도도 하락이 발생하였다.

Keywords

References

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