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The effect of preoxidation on the sulfidation of Ni-20Cr (2–5)Al Alloys

II. Effect of sulfidation temperature and time

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Abstract

The effect of preoxidation in H2/H2O and in dry H2 on the sulfidation resistance of Ni-20Cr-Al alloys with 2, 3.5, and 5 wt.% Al has been investigated. The samples were sulfidized 4 hr in H2/5% H2S at 750, 800, and 850° C. Best results were obtained for the Ni-20Cr-5Al alloy pretreated for 100 hr at 1000°C in dry H2. The sulfidation reaction in H2/5% H2S was retarded strongly by this treatment for a period of 4 hr at 850°C and of 15 hr at 750°C. Although less pronounced, preoxidation of alloys with lower Al contents or pretreatment in H2/H2O show positive effects as well.

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Authors and Affiliations

  1. Institut für Werkstoffwissenschaft, Max-Planck-Institut für Metallforschung, Seestraße 92, D-7000, Stuttgart 1, Germany

    S. W. Kim, K. Ohla, H. Fischmeister & E. Fromm

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  1. S. W. Kim
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  2. K. Ohla
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  3. H. Fischmeister
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  4. E. Fromm
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Kim, S.W., Ohla, K., Fischmeister, H. et al. The effect of preoxidation on the sulfidation of Ni-20Cr (2–5)Al Alloys. Oxid Met 36, 395–407 (1991). https://doi.org/10.1007/BF01151588

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  • DOI: https://doi.org/10.1007/BF01151588

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