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Influence of metal grain growth on the oxidation behavior of a 25Cr-20Ni steel

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Abstract

Comparative oxidation tests with a fine- and a coarse-grain 25Cr-20Ni steel, and cast steel of similar composition in synthetic air between 900 and 1300°C reveal a strong influence of grain growth in the base metal on the oxidation behavior. Metal grain growth destroys the protective Cr2O3-rich scale, and promotes the formation of a scale rich in iron oxides. The result is a higher scaling rate, and a higher Cr depletion at the metal-scale interface of the fine-grain material which undergoes grain growth during oxidation.

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Authors and Affiliations

  1. VARTA-Batterie AG, Forschungs-und Entwicklungszentrum, Gundelhardstraβe, D-6233, Kelkheim, Federal Republic of Germany

    K. Ledjeff

  2. DECHEMA, Postfach 97 01 46, D-6000, Frankfurt(M) 97, Federal Republic of Germany

    A. Rahmel & M. Schorr

Authors
  1. K. Ledjeff
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  2. A. Rahmel
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  3. M. Schorr
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Ledjeff, K., Rahmel, A. & Schorr, M. Influence of metal grain growth on the oxidation behavior of a 25Cr-20Ni steel. Oxid Met 15, 485–493 (1981). https://doi.org/10.1007/BF00603539

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  • DOI: https://doi.org/10.1007/BF00603539

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