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Metal Science and Heat Treatment

, Volume 18, Issue 1, pp 13–16 | Cite as

Oxidation resistance of Ni-Cr-Co and Ni-Cr-Co-Fe alloys

  • S. B. Maslenkov
  • S. D. Voronina
  • N. N. Kozlova
Heat Resistant Steels and Alloys

Conclusions

  1. 1.

    Raising the cobalt concentration from 0 to 40% improves the oxidation resistance of Ni−20Cr alloys, since the amount of Cr2O3 in the scale increases. The oxidation resistance is highest for the alloy with 40% Co. Larger amounts of Co up to 70% lead to the formation of CoO in the scale and smaller amounts of chromium oxide, which has a negative effect on the oxidation resistance of Ni−Cr alloys.

     
  2. 2.

    The addition of up to 25% Fe to Ni−20Cr−Co alloys reduces the amount of Cr2O3 in the scale and lowers the oxidation resistance. With larger amounts of Fe the amount of Cr2O3 in the scale again increases, the oxidation resistance increasing correspondingly. Alloys with 45% Fe have the same oxidation resistance as alloys without Fe.

     

Keywords

Oxidation Chromium Cobalt Oxidation Resistance 20Cr Alloy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Literature cited

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    P. Kofstad and A. Hed, Werkstoffe und Korros.,21, No. 11, 894 (1970).Google Scholar
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    A. Davin and D. Coutsouradies, Werkstoffe und Korros., No. 6, 517 (1971).Google Scholar
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    L'Oxydation des Métaux, Jacques Benard, ed., Gauthier-Villars, Paris (1962–1964).Google Scholar
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    A. S. Tumarev and S. N. Sumin, “Oxidation of Co−Cr alloys,” Trudy Leningrad. Politekhn. Inst., No. 305, 92 (1970).Google Scholar
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    P. Kofstad and A. Hed, J. Electrochem. Soc.,116, No. 11, 1542 (1969).Google Scholar
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    D. V. Ignatov and R. D. Shamgunova, Mechanism of Oxidation of Alloys Based on Nickel and Chromium [in Russian], Izd. Akad. Nauk SSSR, Moscow (1960).Google Scholar

Copyright information

© Plenum Publishing Corporation 1976

Authors and Affiliations

  • S. B. Maslenkov
  • S. D. Voronina
  • N. N. Kozlova

There are no affiliations available

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