Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Electrochemical Evaluation of Corrosion Property of Welded Zone of Seawater Pipe by DC Shielded Metal Arc Welding with Types of Electrodes

선박 해수배관에서 용접봉의 종류에 따라 직류 아크 용접한 용접부위의 부식특성에 관한 전기화학적 평가

  • Lee, Sung-Yul (Department of Marine Equipment Engineering, Korea Maritime University) ;
  • Lee, Kyu-Hwan (Education and Research Division, Korea Institute of Maritime and Fisheries Technology) ;
  • Won, Chang-Uk (Education and Research Division, Korea Institute of Maritime and Fisheries Technology) ;
  • Na, Shane (Dalian Daeyang Ship Yard. Co., LTD. Welding Technical Training Center) ;
  • Yoon, Young-Gon (Dalian Daeyang Ship Yard. Co., LTD. Welding Technical Training Center) ;
  • Lee, Myeong-Hoon (Department of Marine Equipment Engineering, Korea Maritime University) ;
  • Kim, Yun-Hae (Department of Marine System Engineering, Korea Maritime University) ;
  • Moon, Kyung-Man (Department of Marine Equipment Engineering, Korea Maritime University) ;
  • Kim, Jin-Gyeong (Education and Research Division, Korea Institute of Maritime and Fisheries Technology)
  • 이성열 (한국해양대학교 공과대학 조선기자재공학부) ;
  • 이규환 (한국해양수산연수원 교육연구처) ;
  • 원창욱 (한국해양수산연수원 교육연구처) ;
  • 나승수 (대련대양선박공정유한공사 용접기술연수원) ;
  • 윤영곤 (대련대양선박공정유한공사 용접기술연수원) ;
  • 김윤해 (한국해양대학교 공과대학 조선기자재공학부) ;
  • 이명훈 (한국해양대학교 해사대학 기관시스탬공학부) ;
  • 문경만 (한국해양대학교 공과대학 조선기자재공학부) ;
  • 김진경 (한국해양수산연수원 교육연구처)
  • Received : 2013.04.01
  • Accepted : 2013.06.12
  • Published : 2013.06.30
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Abstract

The seawater pipes in the engine rooms of ships are surrounded by severely corrosive environments caused by fast flowing seawater containing chloride ions, high conductivity, etc. Therefore, it has been reported that seawater leakage often occurs at a seawater pipe because of local corrosion. In addition, the leakage area is usually welded using shielded metal arc welding with various electrodes. In this study, when seawater pipes were welded with four types of electrodes(E4311, E4301, E4313, and E4316), the difference between the corrosion resistance values in their welding zones was investigated using an electrochemical method. Although the corrosion potential of a weld metal zone welded with the E4316 electrode showed the lowest value compared to the other electrodes, its corrosion resistance exhibited the best value compared to the other electrodes. In addition, a heat affected zone welded with the E4316 electrode also appeared to have the best corrosion resistance among the electrodes. Furthermore, the corrosion resistance of the weld metal zone and heat affected zone exhibited relatively better properties than that of the base metal zone in all of the cases welded with the four types of electrodes. Furthermore, the hardness values of all the weld metal zones were higher than the base metal zone.

Keywords

References

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