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Simultaneous chromizing-aluminizing coating of austenitic stainless steels

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Abstract

Chromium and aluminum were simultaneously co-deposited by diffusion into austenitic stainless steel substrates, by a single-step, pack-cementation process. The mechanism for the formation of diffusion-coated products on 304 and 316 stainless steels and on Incoloy 800 is discussed. The morphologies of the phases formed at the surface, i.e., an external beta layer and an underlying multiphase interdiffusion zone, are presented. The formation of the brittle, β, outer layer was minimized by variations in the pack composition and activator. The coated 304 and 316 steels exhibited excellent scaling resistance upon oxidation in air at 1000°C.

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Authors and Affiliations

  1. Department of Metallurgical Engineering, Ohio State University, 43210, Columbus, Ohio

    D. M. Miller, S. C. Kung, S. D. Scarberry & R. A. Rapp

Authors
  1. D. M. Miller
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  2. S. C. Kung
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  3. S. D. Scarberry
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  4. R. A. Rapp
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Miller, D.M., Kung, S.C., Scarberry, S.D. et al. Simultaneous chromizing-aluminizing coating of austenitic stainless steels. Oxid Met 29, 239–254 (1988). https://doi.org/10.1007/BF00751798

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  • DOI: https://doi.org/10.1007/BF00751798

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