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희생양극법을 적용한 철도 레일의 방식효과 모니터링 연구

A Study on Monitoring of Mitigation of Rail Corrosion using Sacrificial Anode Cathodic Protection Method

  • 최정열 (동양대학교 철도건설안전공학과) ;
  • 박종윤 (공항철도(주) 시설처) ;
  • 이규용 (공항철도(주) 기술본부) ;
  • 정지승 (동양대학교 철도건설안전공학과)
  • 투고 : 2019.09.04
  • 심사 : 2019.09.29
  • 발행 : 2019.11.30

초록

본 연구에서는 해양성 기후조건에 있는 철도 레일의 부식으로 인한 선로장애를 최소화하고 레일의 부식을 저감시키기 위한 방식대책으로써 희생양극법을 제시하고 방식효과를 실험적으로 입증하였다. 또한 제안된 희생양극을 현장에 시험부설하여 26개월 이상 장기 레일부식모니터링 및 현장적용성을 검토하고 레일부식의 효과를 입증하였다. 셀로판테이프법을 이용한 부식상태 모니터링 결과, 현장시험부설 후 약 26개월이 경과된 현 시점에서의 희생양극의 외관상태는 양호하며, 레일복부와 희생양극의 용접부 이상 및 기타 특이사항은 발견되지 않았으나, 희생양극을 설치하지 않은 개소에서는 녹의 진전이 빠르게 진행되었다. 또한 희생양극의 적정 설치간격은 1.0~1.5m까지가 상대적으로 가장 안정적인 부식피막을 형성하는 것으로 조사되었다. 약 26개월의 모니터링 결과, 희생양극의 설치는 설치간격이 다소 넓더라도 해양성 기후조건에 있는 철도 레일의 전반적인 부식발생 수준을 안정화하는 데에 도움을 줄 수 있어 부식에 취약한 환경에 부설된 철도 레일에 적용이 가능할 것으로 분석되었다.

In this study, we proposed the sacrificial anode cathodic protection method as a countermeasure to reduce the corrosion of railway rails under oceanic climatic conditions and proved the anticorrosive effect experimentally. In addition, the proposed sacrificial anode cathodic protection method were tested on site to examine long-term rail corrosion monitoring and field applicability for more than 26 months and to prove the effectiveness of rail corrosion. As a result of monitoring the corrosion state using the cellophane tape method, the appearance of the applied sections with sacrificial anode cathodic protection method was good at the present time about 26 months after the field test laying, and no abnormalities and other abnormalities of the rail welded section and the rail web were found. Hence, in places where no sacrificial anodes were installed, rust progressed rapidly. In addition, the proper spacing of sacrificial anodes was found to form the most stable corrosion coating at 1.0 ~ 1.5m. After about 26 months of monitoring, the installation of sacrificial anodes could help stabilize the overall rail corrosion level, even if the spacing was somewhat wider.

키워드

참고문헌

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