Oxidation of Metals

, Volume 9, Issue 1, pp 69–97 | Cite as

The oxidation and decarburizing of Fe-C alloys in air and the influence of relative humidity

  • J. Baud
  • A. Ferrier
  • J. Manenc
  • J. Bénard
Article

Abstract

Isothermal oxidation treatments were carried out on an Fe-C alloy (0.4 % C): (a) in almost dry air around A1, and also with an Fe-C alloy (0.5% C) and IRSID pure iron; (b) in dry air (\({\text{P}}_{H_2 O} \simeq 10^{ - 5} \) nm Hg); (c) in almost dry air(1–2% water vapor) at 700° C; and (d) in moist air (31% water vapor). Theresults are as follows: The rate of oxidation at a temperature below A1depends chiefly on alloy structure, i.e., on thermal history of the sample.The water vapor content of the air strongly influences the scale adherenceas well as the rate of oxidation of the Fe-C alloys below A1, but has virtuallyno effect on the rate of oxidation of pure iron. Under the same conditions, avery light decarburization of metal occurs in air, whereas no decarburizationoccurred in air with 13% water vapor.

Key words

oxidation decarburization Fe-C alloys effect of humidity effect of microstructure 

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Copyright information

© Plenum Publishing Corporation 1975

Authors and Affiliations

  • J. Baud
    • 1
  • A. Ferrier
    • 1
  • J. Manenc
    • 1
  • J. Bénard
    • 2
  1. 1.IRSID-Saint-GermainFrance
  2. 2.Ecole Nationale Supérieure de Chimie de ParisParisFrance

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