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Corrosion of inconel 617 in HTGR grade helium

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Abstract

Corrosion of the primary circuit materials is one of the serious problems in High Temperature Gas-cooled Reactors (HTGR). In the present work, the effect of gaseous impurities in the helium coolant on the corrosion behavior of Inconel 617 has been studied at 1000 °C and atmospheric pressure for 1000 h. The helium gases used contained several impurities; H2, H2O, CH4, CO, and CO2. The corrosion behavior of alloying elements (Cr, Mo, Si, C) was strongly affected by the impurity concentration in helium and the extent of corrosion could be explained on the basis of the oxygen and carbon potentials in the gases used.

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Authors and Affiliations

  1. National Research Institute for Metals, 305, Ibaraki, Japan

    Toshiyuki Hirano (Senior Researcher), Masatoshi Okada (Chief of Second Laboratory), Hiroshi Araki (Researcher), Tetsuji Noda (Senior Researcher), Heitaro Yoshida (Division Head, Nuclear Materials Division) & Ryoji Watanabe (Head of Non Ferrous Materials)

Authors
  1. Toshiyuki Hirano
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  2. Masatoshi Okada
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  3. Hiroshi Araki
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  4. Tetsuji Noda
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  5. Heitaro Yoshida
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  6. Ryoji Watanabe
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Ryoji Watanabe, formerly Head of Nuclear Materials Division.

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Hirano, T., Okada, M., Araki, H. et al. Corrosion of inconel 617 in HTGR grade helium. Metall Trans A 12, 451–458 (1981). https://doi.org/10.1007/BF02648542

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  • DOI: https://doi.org/10.1007/BF02648542

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