Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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An Electrochemical Study on the Effect of Salt Affecting to Corrosion Behavior of Concrete Reinforced Steel in Natural Sea Water

천연해수에 침지된 콘크리트 내부의 철근부식거동에 미치는 염분의 영향에 관한 전기화학적 연구

  • 김광근 (한국해양대학교 부식방식공학 연구소) ;
  • 류보현 (한국해양대학교 부식방식공학 연구소) ;
  • 점성종 (한국해양대학교 부식방식공학 연구소) ;
  • 김기준 (한국해양대학교 부식방식공학 연구소) ;
  • 문경만 (한국해양대학교 부식방식공학 연구소)
  • Published : 2000.11.01
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Abstract

When the concrete structures were being made with sand containing chloride ion it was knows that corrosion rate of reinforced steel embedded in concrete with chloride ion was higher than that of concrete with on chloride ion. In this study, the operation of Friedel salts affecting the corrosion behavior of reinforced steel embedded in cement mortar was investigated with electrochemical view. Corrosion potential of reinforced steel embedded in cement mortar with sand containing chloride ion was shifted noble direction than that of cement mortar with no chloride ion after immersed 5 month in natural sea water and also corrosion current density decreased with shifting corrosion potential to noble direction. However Friedel salts appeared from surface to 2.5cm of inside direction of mortar specimen, which is located at 11.5$\circ$(2$\theta$) in XRD analysis and the amount of Ca(OH)2 by SEM photograph in cement mortar with chloride ion was larger than that of cement mortar with mo chloride ion. Eventually it is suggested that Friedel salts was resulted from chloride ion and it acted as the corrosion inhibitor.

Keywords

References

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