鉄と鋼
Online ISSN : 1883-2954
Print ISSN : 0021-1575
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Devanathan-Stachurskiセルに組み合わせた微小キャピラリセルにより観察した炭素鋼板への水素透過
伏見 公志神 実紗子北川 裕一中西 貴之長谷川 靖哉
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2019 年 105 巻 1 号 p. 64-68

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A micro-capillary technique was applied to a Devanathan-Stachurski electrochemical cell for local measurement of hydrogen permeation into a steel sheet. An electrolyte-flowing design for the hydrogen entry side of the Devanathan-Stachurski cell successfully allowed the detection of hydrogen permeation response on hydrogen exit side electrode in a micro-capillary cell with a diameter of 250 µm. Phase shift of the detected permeation current from a sinusoidal perturbation of the electrolyte flow rate in the hydrogen entry cell was strongly dependent on the metallographic structure of the steel sheet. A local structure, in which two single grains form grain boundaries, led to hydrogen permeation more frequently than did a local structure of single grains. The results suggested that the diffusion coefficient of the boundaries was at least two-times larger than that of the grains.

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