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Oxidation of Metals

, Volume 15, Issue 1–2, pp 101–135 | Cite as

Selective oxidation of Fe-Cr alloys

  • I. G. Crouch
  • J. C. Scully
Article

Abstract

The phenomenon of selective oxidation is briefly reviewed with particular reference to the Fe-Cr system. The results of experiments with a binary Fe-13%Cr alloy and a commercial steel, carried out over the temperature range 400–800°C in various hydrogen-water vapor mixtures are reported. Modes of growth are postulated and the protective qualities of the films shown to be dependent more upon morphology and structure than upon composition. Although protective, α-Cr2O3 films can be grown on the binary alloy, the presence of 0.7%Mn in the commercial steel results in the preferential formation of a nonprotective Mn-Cr spinel. In addition to α-Cr2O3 and the Mn-Cr spinels other oxide phases are identified and their effects considered.

Key words

selective oxidation iron-chromium alloys protective films oxide phase characterization quantitative chemical analysis 

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Copyright information

© Plenum Publishing Corporation 1981

Authors and Affiliations

  • I. G. Crouch
    • 1
  • J. C. Scully
    • 2
  1. 1.Military Vehicles and Engineering EstablishmentChristchurchEngland
  2. 2.University of LeedsLeedsEngland

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