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Evaluation of Ozone Resistance and Anti-Corrosion Performance of Water Treatment Concrete according to Types of Metal Spray Coating

수처리시설용 콘크리트의 금속용사 피막 종류에 따른 내오존성 및 전기화학적 방식 성능 평가

  • 박진호 (한양대학교 건설구조물 내구성혁신 연구센터) ;
  • 최현준 (한양대학교 건설구조물 내구성혁신 연구센터) ;
  • 이한승 (한양대학교 건축학부) ;
  • 김상열 (한양대학교 건축시스템공학과) ;
  • 장현오 (한국건설생활환경시험연구원 산업융합센터)
  • Received : 2019.01.24
  • Accepted : 2019.04.01
  • Published : 2019.07.01

Abstract

As the pollution of water resources deteriorates due to industrialization and urbanization, it is difficult to supply clean water through a water treatment method using chlorine. Therefore, the introduction of advanced water treatment facilities using ozone is on the increase. However, epoxy which is used as waterproofing and anticorrosives and stainless steel used in conventional waterproofing and anti-corrosive methods have deteriorated because of the strong oxidizing power of ozone, causing problems such as leaking. Moreover, it even causes the durability degradation of a concrete. Therefore, in this study, metal spraying system was used as the means of constructing a metal panel with excellent ozone resistance and chemical resistance which is an easier method than an existing construction method. Ozone resistance was evaluated in accordance with the type of metal sprayed coatings to develop a finishing method which can prevent the concrete structure of water treatment facilities from deterioration. Furthermore, electrochemical stability in actual sewage treatment plant environment was evaluated. Experimental results showed that Ti has superior ozone resistance after spraying and the electrochemical stability in the sewage treatment plant environment showed that Ti has the highest polarization resistance of $403.83k{\cdot}{\Omega}{\cdot}cm^2$, which ensures high levels of durability.

산업화, 도시화로 인해 수자원의 오염이 악화 되면서 기존에 염소를 이용한 정수처리 방법으로는 깨끗한 물을 공급하는데 어려운 실정이다. 이에 오존을 이용한 고도정수 처리 시설의 도입이 증가하고 있다. 그러나 기존의 방수 방식 공법으로 사용되는 에폭시계 방수 방식제 및 스테인리스는 오존의 강력한 산화력으로 인해 열화되어 박리 등 문제 발생하였으며, 콘크리트까지 영향을 미쳐 내구성 저하의 원인이 된다. 이에 따라 본 연구에서는 내오존성 및 내화학성이 뛰어난 금속 패널을 기존의 시공법 보다 손쉬운 방법으로 시공하기 위한 방법으로 금속 용사 공법을 이용하여 수처리 시설 콘크리트 구조물의 열화를 원천적으로 방지하기 위한 마감공법 개발 연구의 일원으로 용사금속 종류 에 따른 내오존성 평가를 실시하였으며, 실제 하수처리장 환경에서의 전기화학적 안정성능 평가를 실시하였다. 실험결과 용사금속 Ti이 용사 후에도 내오존성이 뛰어난 것으로 나타났으며, 하수처리장 환경에서의 전기화학적 안정성능 평가 결과 용사금속 Ti가 $403.83k{\cdot}{\Omega}{\cdot}cm^2$의 가장 높은 분극저항을 나타남으로써 높은 수준의 내구성을 확보하는 것을 확인할 수 있었다.

Keywords

References

  1. Lee, H. S., Park, J. H., Singh, J. K., and Ismail, M. A. (2016) Protection of reinforced concrete structures of waste water treatment reservoirs with stainless steel coating using arc thermal spraying technique in acidified water, Materials, MDPI, 9(9), 753. https://doi.org/10.3390/ma9090753
  2. Giergiczny, Z., and Krol, A. (2008), Immobilization of heavy metals (Pb, Cu, Cr, Zn, Cd, Mn) in the mineral additions containing concrete composites. J. Hazard. Mater, ELSEVIER SCIENCE BV, 160(2-3), 47-255.
  3. Dodo, M. C., Buffle, M. O., and Ginten, U. V. (2006), Oxidation of antibacterial molecules by aqueous ozone: Moiety-specific reaction kinetics and application to ozone-based wastewater treatment. Environ. Sci. Technol, AMER CHEMICAL SOC, 40(6), 1969- 1977. https://doi.org/10.1021/es051369x
  4. Hirsch, R., Ternes, T.A., Haberer, K., Kratz, K.L. (1999) Occurrence of antibiotics in the environment. Sci. Total Environ, AMER CHEMICAL SOC, 225, 109-118 https://doi.org/10.1016/S0048-9697(98)00337-4
  5. Chung, M. J. (2006), A Study on the Evaluation of Field Application for the Waterproofing or Corrosion Proof Construction Method, as Coating High Quality Filtration plant with Ozone Resistance Paints of Phenol Degeneration Polyamine, Master Thesis, Seoul National University of Science and Technology.
  6. Crowe, D., and Nixon, R. (2016), Corrosion of stainless steels in waste water applications. Available online: http://www.hwea.org/wp-content/uploads/2015/07/150204_Corrosion_of_Stainless_Steels_in_Wastewater_Applications.pdf (accessed on 19 January 2016).
  7. Choe, H. B., Lee, H. S., and Shin, J. H. (2014), Experimental Study on the Electrochemical Anti-Corrosion Properties of Steel Structures Applying the Arc Thermal Metal Spraying Method, Materials, MDPI AG, 7(12), 7722-7736. https://doi.org/10.3390/ma7127722
  8. Lee, H. S., Singh, J. K., Ismail, M. A., and Bhattacharya, C. (2016), Corrosion resistance properties of Aluminum coating applied by arc thermal metal spray in SAE J2334 solution with exposure periods, Metals, 6, 1-15. https://doi.org/10.3390/met6010001
  9. SPS KWWA M211 (2015), Ozone Resistance Test Method of Material for Waterproof and Anticorrosion, Korea Water and WastewaterWorks Association (KWWA), Seoul, Korea.
  10. Park, J. H., Lee, H. S., and Shin, J. H. (2016), An Experimental Study on Evaluation on Bond Strength of Arc Thermal Metal Spaying According to Treatment Method of Water Facilities Concrete Surface. Journal of the Korea Institute of Building Construction, 16(2), 107-115. https://doi.org/10.5345/JKIBC.2016.16.2.107
  11. Lai, J. K. L. (1983), A review of precipitation behaviour in AISI type 316 stainless steel. Mater. Sci. Eng, ELSEVIER SCIENCE SA LAUSANNE, 61(2), 101-109.
  12. Park, J. H., Jang, H. O., and Lee, H. S. (2018) Experimental Study on Evaluation of Bond Strength after Ozone Treatment and Ozone Resistance of Concrete Metal Spray Coating for Advanced Water Treatment, Journal of the Korea Institute for Structural Maintenance and Inspection, 22(4), 68-75. https://doi.org/10.11112/JKSMI.2018.22.4.068