Abstract
The high-temperature-corrosion behavior of alloy 800H has been studied in an oxidizing (SO2−O2,\(P_{O_2 }\)=0.23 atm,\(P_{s_2 } \)=1.9×10−29 atm) and a reducing (H2−H2S−CO−CO2−N2,\(P_{O_2 }\)=1.5×10−18 atm\(P_{s_2 } \)=4.3×10−8 atm, ac=0.03) sulfidizing environment, at 750°C and 850°C, respectively. When corroded in SO2−O2, the protective chromia scale which developed on the alloy in the early stages cracked and spalled in quite a short time period. This led to the growth of iron and nickel sulfides beneath the chromia layer, causing more chromia spallation. When correded in H2−H2S−CO−CO2−N2, the alloy exhibited breakaway corrosion in about 35hr, at which stage liquid nodules formed on the sample surface. The nodules were studied in detail and were found to consist of three layers. The growth mechanism of such nodules is proposed.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
C. B. Alcock, M. G. Hocking, and S. Zador,Corr. Sci. 9, 111 (1969).
K. P. Lillerud, B. Haflan, and P. Kofstad,Oxid. Met. 21, 119 (1984).
H. Xu, M. G. Hocking, and P. S. Sidky,Oxid. Met. 39, 371 (1993).
K. L. Luthra and W. L. Worrell,Met. Trans. A,10, 621 (1979).
M. LaBranche, A. Garratt-Reed, and G. J. Yurek,J. Electrochem. Soc. 130, 2405 (1983).
R. E. Lobnig and H. J. Grabke,Corr. Sci. 30, 1045 (1990).
K. Natesan,Corrosion 41, 646 (1985).
D. J. Baxter and K. Natesan,Corr. Sci. 26, 153 (1986).
V. Vasantasree and M. G. Hocking,Corr. Sci. 16, 261 (1976).
J. K. R. Weber, Ph.D. thesis, Imperial College, London (1986).
P. L. Hemmings and R. A. Perkins, EPRI FP-539, Interim report (1977).
C. J. Smithells (Ed.),Metals Reference Book, 5th ed. (Butterworth, London, 1976).
R. P. Salisbury and N. Birks,J. Iron Steel Inst. 209, 534 (1971).
D. R. Holmes and J. Stirnger, inMaterals to Supply the Energy Demand, E. B. Hawbolt and A. Mitchell, eds. (ASM, 1981), p. 165.
T. C. Tiearney, Jr. and K. Natesan,Oxid. Met. 17, 1 (1982).
S. Taniguchi et al.,Oxid. Met. 34, 277 (1990).
O. K. Chopra and K. Natesan,High Temp. Sci. 9, 243 (1977).
M. F. Stroosnijder and W. J. Quadakkers,High Temp. Tech. 4, 141 (1986).
C. S. Giggins and F. S. Pettit,Oxid. Met. 14, 363 (1980).
K. Hsieh, Y. A. Chang, and T. Zhong,Bull. Alloy Phase Diagrams 3, 165 (1982).
D. S. Williams, R. Moller, and H. J. Grabke,Oxid. Met. 16, 253 (1981).
M. F. Stroosnijder et al.,Oxid. Met. 33, 371 (1990).
A. Rahmel et al.,Oxid. Met. 27, 199 (1987).
W. F. Chu and A. Rahmel,Oxid. Met. 15, 331 (1981).
V. Srinivasan, A. W. McCormick, and A. K. Rai,Oxid. Met. 34, 401 (1990).
D. J. Baxter and K. Natesan,Oxid. Met. 31, 305 (1989).
P. Kofstad,High Temperature Corrosion (Elsevier, New York, 1988).
G. Y. Yurek and K. Przybylski,Mater. Sci. Eng. 87, 125 (1987).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Xu, H., Hocking, M.G. & Sidky, P.S. Sulfidation—oxidation behavior of alloy 800H in SO2-O2 and H2-H2S-CO-CO2 atmospheres. Oxid Met 41, 81–101 (1994). https://doi.org/10.1007/BF01196644
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF01196644