한국표면공학회지 (Journal of the Korean institute of surface engineering)

  • 제57권3호
  • /
  • Pages.192-200
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  • 2024
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  • 1225-8024(pISSN)
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  • 2288-8403(eISSN)
한국표면공학회 (The Korean Institute of Surface Engineering)
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구리 배관의 Sn 첨가에 따른 응력 및 다양한 환경에서의 부식 특성

Corrosion characteristics in stress and various environments with Sn addition to Cu pipe

  • 김세림 (한국해양대학교 해양신소재융합공학과) ;
  • 김의준 (한국해양대학교 해양신소재융합공학과) ;
  • 이명훈 (한국부식방식연구센터) ;
  • 이승효 (한국해양대학교 해양신소재융합공학과)
  • Serim Kim (Korea Maritime and Ocean University, Department of Ocean Advanced Materials Convergence Engineering) ;
  • Uijun Kim (Korea Maritime and Ocean University, Department of Ocean Advanced Materials Convergence Engineering) ;
  • Myeonghoon Lee (Korean Institute of Corrosion Science and Technology) ;
  • Seunghyo Lee (Korea Maritime and Ocean University, Department of Ocean Advanced Materials Convergence Engineering)
  • 투고 : 2024.04.19
  • 심사 : 2024.04.25
  • 발행 : 2024.06.30
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초록

Cu as a heat exchanger tube is an important component in thermal fluid transfer. However, Cu tubes are exposed to stress in certain environments, leading to stress corrosion cracking (SCC). In this study, the effect of Sn addition on microstructure and corrosion characteristics was examined. The microstructural examination revealed the presence of columnar crystal and a grain refinement due to the addition of Sn. Electrochemical measurements showed that the 5 wt.% NH3 environment was the most vulnerable environment to Cu corrosion, and the corrosion current density increased as stress increased. The immersion test exhibited the formation of Cu2O and Cu(OH)2 corrosion product in 3.5 wt.% NaCl and 5 wt.% NH3 environments, respectively. Results indicated that Sn addition to Cu was an important factor in improving the mechanical strength.

키워드

과제정보

이 논문은 2024년도 해양수산부 재원으로 해양수산과학기술진흥원의 지원을 받아 수행된 연구임(20200599, 해양플라스틱 쓰레기 저감을 위한 기술 개발, 자율운항선박 기술개발).

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