한국건설순환자원학회논문집 (Journal of the Korean Recycled Construction Resources Institute)

한국건설순환자원학회 (Korean Recycled Construction Resources Institute)
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시멘트계 보수재료로 코팅된 강재의 부식 및 휨강성 평가

Evaluation of Steel Corrosion and Flexural Strength Coated with Cementitious Repair Material

  • 윤용식 (한남대학교 건설시스템공학과) ;
  • 김태상 (한국건설생활환경시험연구원 에너지환경사업본부 건축환경재료센터) ;
  • 김호룡 (한국건설생활환경시험연구원 에너지환경사업본부 건축환경재료센터) ;
  • 권성준 (한남대학교 건설시스템공학과)
  • Yoon, Yong-Sik (Department of Civil Engineering, Hannam University) ;
  • Kim, Tae-Sang (Korea Conformity Laboratories Energy & Environment Business Division Built Environment Materials Center) ;
  • Kim, Ho-Ryong (Korea Conformity Laboratories Energy & Environment Business Division Built Environment Materials Center) ;
  • Kwon, Seung-Jun (Department of Civil Engineering, Hannam University)
  • 투고 : 2016.08.09
  • 심사 : 2016.09.12
  • 발행 : 2016.09.30
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초록

본 연구에서는 시멘트계 보수재 코팅이 철판의 부식 저항성에 미치는 영향을 평가하가 위해 보통 철판(Normal), 용접철판(Welding), 용접 후 보수재 철판(Welding & coating)의 세 가지 경우에 대하여 7일간 ICM(Impressed Current Method)를 통하여 부식을 촉진시켰다. 이후 Faraday 법칙을 통해 얻은 이론 부식률, 실험 부식률 그리고 부식 실험 후 측정한 휨 강도를 비교 평가하였다. Normal case와 Welding case에서는 약 70% 수준의 부식률이 측정되었으며, Welding & coating case에서는 약 17%정도의 부식률이 측정되었다. 이는 시멘트계 보수재료의 코팅이 염화물 이온의 침투를 효과적으로 차단하였으며 이로 인해 부식전류의 발생이 억제되었기 때문이다. 휨 강도 역시 부식률 평가와 같은 경향을 나타내었으며 Welding & coating case에서 Welding case 대비 약 3.4배 큰 강도가 평가되었다. 시멘트계 보수재 코팅이 용접부에 시행되면 용접부 철판의 부식 차단에 효과적일 것으로 판단된다.

The present work is for an evaluation of resistance to corrosion in steel coated with cementitious repair material, so that 3 cases of steel plate(Normal, Welding, Welding & coating case) are subjected to ICM(Impressed Current Method) for acceleration of corrosion for 7days. Tested and estimated corrosion ratio through Faraday's Law are compared, and the related flexural strength are evaluated. In Normal and Welding cases, similar level of corrosion ratio(70%) is evaluated, however only 17% level of corrosion ratio is evaluated in the Welding & coating case, which indicates that cementitious repair material is effective to anti-corrosion due to a block of chloride penetration. The flexural test results are consistent with those in accelerated corrosion test, which shows a significant flexural strength in Welding & coating case by 3.4times greater than the others. The cementitious material repair coating is evaluated to be effective to anti-corrosion in welding of steel plate.

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참고문헌

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