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Effect of modification of the surface on the hydrogen permeability of reactor steels and their welded joints

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Materials Science Aims and scope

We study the characteristics of hydrogen permeability of 10Kh9VFA and 12Kh18N10T reactor steels in the intact state and in the presence of welds and analyze the influence of oxidation and irradiation with protons on these characteristics. It is shown that the proton irradiation increases the thermal stability and the degree of protection against the penetration of hydrogen into the oxidized specimens. To determine the contribution of the welds to the solubility of hydrogen, we apply, for the first time, a combined approach, namely, the diffusion coefficient of hydrogen in the weld is found according to the changes in the electric resistance in the process of hydrogenation and the hydrogen permeability of the welded joint is determined from the ratio of the areas of the base metal and the weld. It is shown that the oxide films with structures of chromium spinel formed on the surface of steels decrease their hydrogen permeability by 1.5–2 orders of magnitude.

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Authors and Affiliations

  1. Karpenko Physicomechanical Institute, Ukrainian National Academy of Sciences, Lviv, Ukraine

    V. V. Fedorov & T. M. Zasadnyi

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  1. V. V. Fedorov
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  2. T. M. Zasadnyi
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Correspondence to V. V. Fedorov.

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Translated from Fizyko-Khimichna Mekhanika Materialiv, Vol. 45, No. 5, pp. 33–38, September–October, 2009.

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Fedorov, V.V., Zasadnyi, T.M. Effect of modification of the surface on the hydrogen permeability of reactor steels and their welded joints. Mater Sci 45, 644–650 (2009). https://doi.org/10.1007/s11003-010-9226-z

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  • DOI: https://doi.org/10.1007/s11003-010-9226-z

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