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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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초록· 키워드
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Recently, many types of constructional steels have been often exposed to under severe corrosive environments due to acid rain with increasing environmental contamination. In order to inhibit their corrosion in severe corrosive environments, a painting method has been widely applied to numerous constructional steels of land as well as marine. Therefore, development of paint having a good quality of corrosion resistance is considered to be very important. In this study, four types of anti-corrosive paints (AP: Phenol epoxy, AC: Ceramic epoxy, AT: Coal tar epoxy, AH: High solid epoxy) were coated to the specimens, and then, were immerged in various salt solutions (0.1, 0.3, 3, 6, 9 and 15% NaCl solutions) for 11 days. And, the corrosion resistance of these samples by effect of osmotic pressure with salt concentration was investigated with electrochemical methods such as measurement of corrosion potential, impedance and corrosion current density. The corrosion current densities of all samples (AC, AT and AH) submerged in 3% NaCl solution exhibited the smallest values compared to other salt solutions. However, in the case of lower values of salt solutions than 3% NaCl solution, the corrosion current density increased again because it makes easier for water, dissolved oxygen and chloride ion etc. to invade toward inner side of coating film due to increasing of the osmotic pressure than 3% NaCl solution, but in the case of higher values of salt solutions than 3% NaCl solution, the coating film is easily deteriorated due to high concentration of chloride ion rather than the osmotic pressure, which resulted in increasing the corrosion current density. In particular, the AC sample indicated the best corrosion resistance in 6% NaCl solution compared to other samples. Consequently, it is considered that the corrosion mechanism of the coated steel plate is completely different from bare steel plate, and the corrosion resistance of coating film by osmotic pressure and chloride ion depend on various types of epoxy of paint in NaCl solution.
목차
Abstract
1. 서론
2. 시험편 제작 및 실험방법
3. 실험결과 및 고찰
4. 결론
References
참고문헌 (13)
참고문헌 신청
P. Cicognami, Application of the Boundary- Element Method to Offshore Cathodic Protection Modeling, J. of .Electro. Soc. 137 (1990) 1689- 1695.
K. G. Compton, Factor Involved in Corrosion of Lead Cable Sheath, CORRO. 17 (1961) 115-118.
P. O. Gartland, E. Bardel, R.E. Andresen, and R. Johnson, Effect of Flow on the Cathodic Protection of a Steel Cylinder in Sea Water, CORRO. 40 (1984) 127-133.
M. Hiramatsi, M. Hino and T. Omi, Current Trend in Development of Corrosion Protective Plating, Zairo-to-Kankyo, 45 (1996) 33-41.
D. A. Jones and N. R. Nair, .Electrochemical Corrosion Studies on Zinc- Coated Steel, CORRO. 41 (1985) 357-362.
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UCI(KEPA) : I410-ECN-0101-2018-581-002065155