Abstract
The nature of the first-formed oxide on 20% Cr/25% Ni/Nb stabilized steel during exposure to CO2 at high and low temperatures has been determined by surface analytical techniques. These results together with a consideration of gas/solid interactions show that the oxide produced may be determined by kinetics or thermodynamic factors, and a diagram is presented to show that rhombohedral Cr2O3 or spinel may be the oxide first formed. Under most standard conditions, a mixed spinel oxide is formed initially, and the subsequent growth of a duplex oxide is analyzed in terms of a solid-state reaction in which the spinel oxide is reduced to Cr2O3 at the metal/oxide interface. Diffusion control of growth by either spinel or Cr2O3 is incorporated in new equations describing the kinetics of oxidation, and weight-gain predictions are tested against experimental observations.
Similar content being viewed by others
References
J. E. Antill, C. S. Campbell, D. Goodison, W. B. Jepson, and G. C. Stevens,Proc. 3rd Geneva Conf. on Peaceful Uses of Atomic Energy 9, 523 (1964).
J. E. Antill and J. B. Warburton,Corr. Sci. 7, 645 (1967).
J. M. Francis and W. H. Whitlow,J. Iron Steel Inst. 203, 468 (1965).
J. M. Francis, M. T. Curtis, and D. A. Hilton,J. Nucl. Mat. 41, 203 (1971).
R. Hales, A. F. Smith, and J. C. Killeen, BNES Conf. on Corrosion of Steels in CO2 (1974), p. 312.
C. Tyzack, H. C. Cowan, M. Farrow, P. B. Longton, and W. H. Whitlow, BNES Conf. on Corrosion of Steels in CO2 (1974), p. 359.
H. E. Evans, R. Haies, D. A. Hilton, R. A. Holm, G. Knowles, and R. J. Pearce, BNES Conf. on Corrosion of Steels in CO2 (1974), p. 284.
H. E. Evans, D. A. Hilton, and R. A. Holm,Oxid. Met. 10, 149 (1976).
H. E. Evans, D. A. Hilton, R. A. Holm, and S. J. Webster,Oxid. Met. 14, 235 (1980).
P. A. Tempest and R. K. Wild,J. Nucl. Mat. 102, 183 (1981).
P. A. Tempest and R. K. Wild, CEGB Note, RD/B/5179N81 (1981).
A. F. Smith, M. O. Tucker, and R. Hales,Oxid. Met. 17, 329 (1981).
P. A. Tempest and R. K. Wild, unpublished results (1981).
J. W. Tyler, unpublished results (1983).
G. C. Allen, I. T. Brown, and R. K. Wild,J. Nucl. Mat. 68, 179 (1977).
L. A. Mathews and P. L. Surman, CEGB Report, RD/L/R1844 (1973).
G. C. Allen and R. K. Wild,J. Electron Spectrosc. Relat. Phenom. 5, 409 (1974).
R. K. Wild,Corr. Sci. 17, 87 (1977).
J. P. Coad and R. K. Wild,Appl. Surf. Sci. 14, 321 (1983).
G. C. Allen, R. K. Wild, and M. Weiss,Phil. Mag. 48, 373 (1983).
P. A. Tempest and R. K. Wild, CEGB Note, RD/B/5091/N81 (1981).
P. A. Tempest and R. K. Wild,Oxid. Met. 17, 345 (1982).
P. A. Tempest and R. K. Wild, unpublished results.
P. Kofstad,High Temperature Oxidation of Metals (Wiley, New York, 1966).
D. R. Holmes and D. Mortimer, Corrosion Conf., Bath University, U.K. (1973).
C. Wagner,J. Electrochem. Soc. 99, 369 (1952).
P. A. Tempest and R. K. Wild, Berkeley Nucl. Labs., Internal report (1982).
G. C. Allen, P. M. Tucker, and R. K. Wild,Oxid. Met. 13, 223 (1979).
D. J. Turner, CEGB Note, RD/L/N33/80 (1980).
C. Wagner and K. Brunewald,Z. Phys. Chem. B40, 455 (1938).
R. E. Carter and F. D. Richardson,Trans. AIME 203, 336 (1955).
L. Hinnel, R. F. Mehl, and C. E. Birchenal),J. Metal. 5, 827 (1953).
P. Skeldon, J. M. Calvert, and D. G. Lees,Proc. Roy. Soc. A296, 545 (1980).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Tempest, P.A., Wild, R.K. Formation and growth of spinel and Cr2O3 oxides on 20% Cr-25% Ni-Nb stainless steel in CO2 environments. Oxid Met 23, 207–235 (1985). https://doi.org/10.1007/BF00659904
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF00659904