Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
권호 표지

Evaluation of Corrosion Resistance of Anti-Corrosive Paint by Investigation of Diffusion Limiting Current Density

확산한계전류밀도 고찰에 의한 방청도료의 내식성평가

  • Moon, Kyung-Man (Dept. of Marine Equipment Engineering, Korea Maritime Univ) ;
  • Kim, Yun-Hae (Dept. of Marine Equipment Engineering, Korea Maritime Univ) ;
  • Lee, Myung-Hoon (Dept. of Marine System Engineering, Korea Maritime Univ) ;
  • Lee, In-Won (Dept. of Naval Architecture and Ocean Engineering, Pusan Nation Univ) ;
  • Park, Hyun (Dept. of Naval Architecture and Ocean Engineering, Pusan Nation Univ) ;
  • Chun, Ho-Hwan (Dept. of Naval Architecture and Ocean Engineering, Pusan Nation Univ)
  • 문경만 (한국해양대학교 조선기자재공학부) ;
  • 김윤해 (한국해양대학교 조선기자재공학부) ;
  • 이명훈 (한국해양대학교 기관시스템공학부) ;
  • 이인원 (부산대학교 조선해양공학과) ;
  • 박현 (부산대학교 조선해양공학과) ;
  • 전호환 (부산대학교 조선해양공학과)
  • Published : 2009.08.31
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Abstract

It has been observed that coated steel structures deteriorate more rapidly than the designed lifetime due to acid rain caused by air pollution, etc. Therefore, improving the corrosion resistance of anti-corrosive paint is very important in terms of safety and the economic point of view. In this study, the corrosion resistance of five kinds of anti-corrosive paints, including the Acryl, Fluorine, and Epoxy resin series, were investigated with electrochemical methods, such as corrosion potential measurements, polarization curves, diffusion limiting current density, etc. As a result, the corrosion resistance of the F101 specimen with the fluorine resin series was found to be superior to the other specimens, while E100 with the epoxy resin series also showed a somewhat good corrosion resistance. Furthermore, it was observed that the amount of water and oxygen entering the inner side of a painted film increased with an increase in immersion time, irrespective of the kind of resin series. However, the oxygen diffusion limiting current density of a specimen with good corrosion resistance was relatively decreased compared to other specimens, because of the difficulty of oxygen diffusion penetrating to the inner side of the film. Consequently it is suggested that we can qualitatively evaluate the corrosion resistance of an anti-corrosive paint by measuring the diffusion limiting current density as an electrochemical method.

Keywords

References

  1. Cicognami, P. (1990). "Application of the Boundary-element Method to Offshore Cathodic Protection Modeling", J. Electrochem. Soc., Vol 137, No 6, pp 1689-1695 https://doi.org/10.1149/1.2086771
  2. Compton, K.G. (1961). "Factor Involved in Corrosion of Lead Cable Sheath", Corrosion, Vol 17, pp 115-118
  3. Gartland, P.O., Bardel, E., Andresen, R.E. and Johnson, R. (1984). "Effect of Flow on the Cathodic Protection of a Steel Cylinder in Sea Water", Corrosion, Vol 40, No 3, pp 127-133
  4. Hiramatsi, M., Hino, M. and Omi, T. (1996). "Current Trend in Development of Corrosion Protective Plating", Zairoto-Kankyo, Vol 45, No 1, pp 33-41 https://doi.org/10.3323/jcorr1991.45.33
  5. Jones, D.A. and Nair, N.R. (1985). "Electrochemical Corrosion Studies on Zinc-coated Steel", Corrosion, Vol 41, No 6, pp 357-362
  6. Newman, J. (1991). "Cathodic Protection with Parrel Cylinders", J. Electrochem. Soc., Vol 130, No 12, pp 3554-3559
  7. Steinsmo, U. and Bardal, E. (1989a). "Factors Limiting the Cathodic Current on Painted Steel", J. Electrochem. Soc., Vol 136, No 12, pp 3588-3594 https://doi.org/10.1149/1.2096514
  8. Steinsmo, U., Ska, J.I. and Bardal, E. (1989b). "The Effect of the Dry Film Thickness, Temperature, and Electrolyte on the Cathodic Current of Painted Steel", J. Electrochem. Soc., Vol 136, No 12, pp 3383-3587
  9. Talati, J.D., Patel, G.A. and Gandhi, D.K. (1984). "Maximum Utilization Current Density", Corrosion, Vol 40, No 2, pp 88-91 https://doi.org/10.5006/1.3593921
  10. The Overseas Coastal Area Development Institute of Japan (1998). "Corrosion Protection and Repair Manual for Port and Harbor Steel Structures", pp 27-96
  11. 문경만, 조황래, 이명훈, 김현명, 이인원, 전호환 (2007). "중방식도료의 내식성에 미치는 첨가제의 영향", 한국해양공학회지, 제21권, 제3호, pp 65-70
  12. 문경만 (1999). 알기쉬운 문답식 실용전기화학, 효성출판사, pp 106-148
  13. 부식손실조사보고서 (1977). 일본방식기술협회
  14. 성호진, 김진경, 이명훈, 김기준, 문경만 (2005). "중방식도료의 내식성에 관한 전기화학적 평가", 한국마린엔지니어링학회지, 제29권, 제5호, pp 519-525