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High-temperature oxidation of aluminum electroplated Fe-Mn alloys

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Abstract

Austenitic Mn-Al alloys (20–32 W/O Mn, 7–10 Al, 2–3 Si, 1C) were found to have satisfactory oxidation resistance up to 950°C under isothermal conditions in air. Surface enrichment of aluminum is a necessary condition for obtaining an almost pure alumina scale for uses at higher temperatures. Four different Mn-steels were Al-coated by the Capuano electroplating process. In all the steels there was an increase in the hot-oxidation resistance. The best results were obtained with steels containing both Al and Si, and this for temperatures up to 1100°C. No spalling was noticed during rapid cooling of the test pieces. Silicon was found to act as a diffusion barrier to outward iron diffusion. It appears that there is formation of a pure, thin film of alumina from the matrix which interacts with the aluminum diffusing from the superimposed, coating for the formation of good bonds.

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Authors and Affiliations

  1. Dipartimento ICMMPM-Metallurgia, Universita di Roma, La Sapienza

    U. Bernabai & F. Felli

  2. Department of Chemistry, University of Quebec at Montreal, Montreal, Quebec, Canada

    G. A. Capuano & A. Dang

Authors
  1. U. Bernabai
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  2. G. A. Capuano
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  3. A. Dang
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  4. F. Felli
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Bernabai, U., Capuano, G.A., Dang, A. et al. High-temperature oxidation of aluminum electroplated Fe-Mn alloys. Oxid Met 33, 309–320 (1990). https://doi.org/10.1007/BF00667420

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  • DOI: https://doi.org/10.1007/BF00667420

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