During the reaction of a pure metal with complex atmospheres containing both oxygen and sulfur, the formation of sulfide mixed with oxide is often observed at high temperature, contradicting thermodynamic predictions. The mechanism proposed so far to explain the formation of a duplex scale at the scale surface assumes a change in composition of the gas phase in a boundary layer next to the scale-gas interface and a reaction of the metal with the molecules of the two elements. This model is shown to be unable to explain the observed amounts of the less stable phase and the reaction rates when sulfur dioxide is the prevailing reacting species and is substituted by the assumption of a direct reaction with the SO2 molecules. The thermodynamic equivalence of the two approaches is also pointed out.
This is a preview of subscription content, log in to check access.
Buy single article
Instant access to the full article PDF.
Price includes VAT for USA
Subscribe to journal
Immediate online access to all issues from 2019. Subscription will auto renew annually.
This is the net price. Taxes to be calculated in checkout.
N. Birks and N. Tattam,Corros. Sci. 10, 857 (1970).
T. Flatley and N. Birks,J. Iron Steel Inst. 209, 523 (1971).
M. R. Wootton and N. Birks,Corros. Sci. 12, 829 (1972).
G. Romeo and H. S. Spacil, inHigh Temperature Gas-Metal Reactions in Mixed Environments, S. A. Jansson and Z. A. Foroulis, eds. (Metall. Soc. A.I.M.E., New York, 1973), p. 299.
F. S. Petitt, J. A. Goebel, and G. W. Goward,Corros. Sci. 9, 903 (1969).
A. Rahmel,Corros. Sci. 13, 125 (1973).
A. Rahmel,Oxid. Met. 9, 401 (1975).
N. Birks, inHigh Temperature Gas-Metal Reactions in Mixed Environments, S. A. Jansson and Z. A. Foroulis, eds. (Metall. Soc. A.I.M.E., New York, 1973), p. 322.
S. Mrowec, J. C. Colson, G. Pawlowsky, and J. Podhorodecki,Bull. Soc. Chim. 11, 4103 (1972).
B. Chatterjee and A. J. Dowell,Corros. Sci. 15, 639 (1975).
P. Barret and B. Dupuisson,Rev. Int. Hautes Temp. Refract 14, 145 (1977).
C. B. Alcock, M. G. Hocking, and S. Zador,Corros. Sci. 9, 111 (1969).
A. Rahmel,Werkst. Korros. 23, 272 (1972).
T. K. Ross,Corros. Sci. 5, 327 (1965).
R. J. Hussey and M. Cohen,Corros. Sci. 11, 699 (1971).
P. Kofstad,High Temperature Oxidation of Metals (Wiley, New York, 1966), Chap. V.
About this article
Cite this article
Gesmundo, F. Mechanism of the simultaneous formation of oxide and sulfide at the scale surface during the oxidation of a pure metal in mixed atmospheres. Oxid Met 13, 237–244 (1979). https://doi.org/10.1007/BF00603668
- corrosion of pure metals
- simultaneous oxidation and sulfidation
- reaction mechanism