Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Formation of Calcareous Deposit on Steel Plate by using Waste Oyster Shell

강판상에 굴 패각을 이용한 탄산칼슘 피막의 형성

  • Kim, Beomsoo (Department of Mechanical System Engineering and Institute of Marine Industry, Gyeongsang National University) ;
  • Kwon, Jaesung (Department of Mechanical System Engineering and Institute of Marine Industry, Gyeongsang National University) ;
  • Kim, Yeonwon (Division of Marine Mechatronics, Mokpo National Maritime University) ;
  • Lee, Myeonghoon (Division of Marine Engineering, Korea Maritime and Ocean University) ;
  • Yang, Jeonghyeon (Department of Mechanical System Engineering and Institute of Marine Industry, Gyeongsang National University)
  • 김범수 (경상대학교 해양산업연구소 기계시스템공학과) ;
  • 권재성 (경상대학교 해양산업연구소 기계시스템공학과) ;
  • 김연원 (목포해양대학교 메카트로닉스공학부) ;
  • 이명훈 (한국해양대학교 기관공학부) ;
  • 양정현 (경상대학교 해양산업연구소 기계시스템공학과)
  • Received : 2017.12.08
  • Accepted : 2017.12.22
  • Published : 2017.12.31
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Abstract

Enormous amount of waste oyster-shell (OS) has a major disposal problem in coastal regions. OSs have attracted much attention for recycling, because these are mainly composed of calcium carbonate with rare impurities. In this study, we demonstrate the calcareous deposit films on steel plate by using OSs on the basic of cathodic protection technique. The composition of the OSs was analyzed by wavelength dispersive X-ray fluorescence spectrometer. Carbon dioxide gas was pumped into distilled water to make carbonic acid solution for dissolution of OS. The calcareous deposit was characterized by second electron microscope (SEM), energy dispersive X-ray analysis (EDX) and X-ray diffraction. Corrosion rates were estimated by measurements of anodic polarization and immersion test. It is confirmed that calcareous deposits on steel plate are formed under all condition of cathodic protection by using waste OS from the SEM and EDX results. Calcareous deposits on steel by OS provide good corrosion resistance by acting as a barrier to oxygen supply to the steel surface.

Keywords

References

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