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Study on the characteristics of acid resistance and thermal shock for epoxy coatings

에폭시계 코팅재의 내산열충격 특성에 관한 연구

  • Lee, Sang-Yeal (Department of Automotive Engineering, Pohang College) ;
  • Yun, Byoung-Du (Department of Mechanical Engineering, Graduate School, Pukyong National University)
  • 이상열 (포항1대학 자동차공학과) ;
  • 윤병두 (부경대학교 대학원 기계공학과)
  • Published : 2007.11.30

Abstract

This paper was studied on the characteristics of acid resistance and thermal shock for epoxy coatings in the strong acidic environment. The exhaust gas system, such as a air preheater, desulfurization equipment, for industrial boiler is damaged by dew point corrosion. To protect the acid corrosion, the coating using nonmetal was applied. The electrochemical polarization test, acid resistance and thermal shock test for epoxy coatings were carried out. And the acid resistance and thermal shock characteristics, aspect, and electrochemical anti-corrosion characteristics for epoxy coatings in the strong acidic environment were considered. The main results are as followings: As the epoxy glass flake coating by acidic thermal shock was damaged to the crack, blistering and elution etc., the current density of epoxy glass flake coating is high. But the damage of epoxy metal complex coating by acidic thermal shock was not occurred. Therefore the characteristics of acid resistance and thermal shock for epoxy metal complex coating is better than those for epoxy glass flake coating.

Keywords

References

  1. ASTM INTERNATIONAL, 2004. Standard test method for sulfuric acid resistance of polymer linings for flue gas desulfurization Systems. D6137-97, pp. 1-3
  2. Jeon, D.H., 1989. Practical anti-corrosion engineering. TaeHwa publishing Co., pp. 172-173
  3. Joseph, R.D., 2000, Corrosion understanding the basics. ASM international, p. 279, p. 287
  4. Kim, C.Y., 1991. Properties and application of glass. DaeGwang Co., p. 92
  5. Lee, Y.H., 1997. Anticorrosive data book, Korea institute of construction anti corrosive technology. pp. 251- 257
  6. Lim, U.H., S.J. Kim, J.H. Hwang, D.Y. Yun, 2001. The study on the behavior of corrosion Al-alloy shell for cooler. Autumn conference of KSPSE, 209-210
  7. Mitsuyori, A., T. Tooru and H. Shiro, 1989. Mass transport and delamination of coated steels during under-film corrosion. ZAIRYO-TO-KANKYO. Japan, 38(8), 429-436
  8. Sheir, L.L., R.A. Jarman, 1994. Corrosion volume 2. Butterworth Heinemann Ltd., pp. 14:43-14:44
  9. Song, W. and K.J. Kim, 1996. A study on the physical properties of alumina with oxides addition and its corrosion behavior in alkaline solution. CSSK 25(2), 192
  10. Takashi, Y., O. Mitsuyuki, M. Takeo, I. Yoshitaka and H. Kiyoaki, 1986. ZAIRYO-TO-KANKYO. Japan, 35(1), 3-5
  11. William, H.H. and H.C. Charles, 1994. Calcareous deposits on metal surfaces in seawater. Corrosion. NACE, 40(11), 609-618
  12. William. S.T., 1994. An instruction to electrochemical corrosion testing for practicing engineers and scientists. Clair, pp. 58-61
  13. Yausaki, M. and T. Norimichi, 1991. Global acidic environmental pollution and materials damage. ZAIRYO-TO-KANKYO. Japan, 40(9), 619-629 https://doi.org/10.3323/jcorr1991.40.619