Effects of Sulfuric Acid Concentration and Alloying Elements on the Corrosion Resistance of Cu-bearing low Alloy Steels
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During the process of sulfur dioxide removal, flue gas desulfurization equipment provides a serious internalcorrosion environment in creating sulfuric acid dew point corrosion. Therefore, the utilities must use theexcellent corrosion resistance of steel desulfurization facilities in the atmosphere. Until now, the trend indeveloping anti-sulfuric acid steels was essentially the addition of Cu, in order to improve the corrosionresistance. The experimental alloy used in this study is Fe-0.03C-1.0Mn–0.3Si-0.15Ni-0.31Cu alloys towhich Ru, Zn and Ta were added. In order to investigate the effect of H2SO4 concentration and the alloyingelements, chemical and electrochemical corrosion tests were performed. In a low concentration of H2SO4solution, the major factor affecting the corrosion rate of low alloy steels was the exchange current densityfor H+/H2 reaction, while in a high concentration of H2SO4 solution, the major factors were the thin anddense passive film and resulting passivation behavior. The alloying elements reducing the exchange currentdensity in low concentration of H2SO4, and the alloying elements decreasing the passive current densityin high concentration of H2SO4, together play an important role in determining the corrosion rate of Cu-bearinglow alloy steels in a wide range of H2SO4 solution.
Abstract
During the process of sulfur dioxide removal, flue gas desulfurization equipment provides a serious internalcorrosion environment in creating sulfuric acid dew point corrosion. Therefore, the utilities must use theexcellent corrosion resistance of steel desulfurization facilities in the atmosphere. Until now, the trend indeveloping anti-sulfuric acid steels was essentially the addition of Cu, in order to improve the corrosionresistance. The experimental alloy used in this study is Fe-0.03C-1.0Mn–0.3Si-0.15Ni-0.31Cu alloys towhich Ru, Zn and Ta were added. In order to investigate the effect of H2SO4 concentration and the alloyingelements, chemical and electrochemical corrosion tests were performed. In a low concentration of H2SO4solution, the major factor affecting the corrosion rate of low alloy steels was the exchange current densityfor H+/H2 reaction, while in a high concentration of H2SO4 solution, the major factors were the thin anddense passive film and resulting passivation behavior. The alloying elements reducing the exchange currentdensity in low concentration of H2SO4, and the alloying elements decreasing the passive current densityin high concentration of H2SO4, together play an important role in determining the corrosion rate of Cu-bearinglow alloy steels in a wide range of H2SO4 solution.
참고문헌 (33)
- A. K. Sharma, , Int. J. Chem. Eng. Appl., 3, pp.129~ (2012)
- TEX> in a FGD System, open access;Waste Water - Treatment and Reutilization, "Using Seawater to Remove <TEX>$SO_2$<", pp.2011, J. T. Lee
- J. E. Staudt, "Paper # 04-A-56-AWMA", Proc. Combined Power Plant Air Pollutant Control Mega Symposium 2004 (2004)
- D. Kelley, , J. Reinf. Plast. Comp., 51, pp.14~ (2007)
- 박선아, "황산·염산 복합 내식강 개발: 1. 저합금강의 내식성에 영향을 미치는 합금원소의 영향", 대한금속·재료학회지, 52(11), pp.837~855 (2014), 대한금속·재료학회[DOI]
- M. Seo, , Corros. Sci., 26, pp.949~ (1986)[DOI]
- A. Yamamoto, , Corros. Eng., 35, pp.48~ (1986)
- J. Okamoto, , Nippon Steel Technical Report, 87, pp.46~ (2003)
- J. Y. Park, , POSCO Research paper, 12, pp.23~ (2007)
- 김선홍, "Alloying Effect of Copper on the Corrosion Properties of Low-Alloy Steel for Flue Gas Desulfurization System", Metals and Materials International, 21(2), pp.232~241 (2015), 대한금속·재료학회[DOI]
- A. Pardo, , Corros. Sci., 48, pp.1075~ (2006)[DOI]
- K. N. Oh, , Electrochim. Acta, 88, pp.170~ (2013)[DOI]
- J. H. Hong, , Corros. Sci., 54, pp.174~ (2012)[DOI]
- J. S. Lee, , Mater. Trans., 53, pp.1048~ (2012)[DOI]
- S. T. Kim, , Corros. Sci. Tech., 28, pp.281~ (1999)
- H. E. Townsend, , Corrosion, 57, pp.497~ (2001)[DOI]
- H. E. Townsend, , Corrosion, 50, pp.546~ (1994)[DOI]
- M. J. Kim, , Int. J. Electrochem. Sci., 10, pp.6872~ (2015)
- K. H. Kim, , Corros. Sci., 53, pp.3576~ (2011)[DOI]
- S. A. Park, , Corrosion, 70, pp.196~ (2014)[DOI]
- D. Devilliers, , J. New. Mat, Electrochem. systems, 2, pp.221~ (2006)
- N. D. Nam, , Corros. Sci., 52, pp.3337~ (2010)
- L. L. Wikstrom, , J. Electrochem. Soc., 122, pp.1201~ (1975)[DOI]
- M. Metikos-Hukovic, , Electrochim. Acta, 25, pp.717~ (1979)
- IARC, "Antimony trioxide and antimony trisulfide", IARCMonog. Eval. Carc, 47, pp.291~ (1989)
- NARS, "Main Issues regarding the Introduction of the Good Samaritan Law", 90~ (2010)
- S. Uttiya, , J. Mater. Sci. Nanotechnol., 1, pp.1~ (2014)
- A. S. Mogoda, , Indian J. Chem. Techn., 2, pp.217~ (1995)
- D. L. Graver, "Corrosion data survey-Metals section", NACE, 69~ (1985)
- J. H. Potgieter, , INCSAC, 2, pp.235~ (1992)
- P. P. Sharma, , J. Electrochem. Soc., 158, pp.H111~ (2011)[DOI]
- E. B. Ituen, , Advan. Appl. Sci. Res., 5, pp.26~ (2014)
- S. A. Odoemelam, , Port. Electrochim. Acta, 27, pp.57~ (2009)[DOI]