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    Volume 50, Issue 1 (June 2021)

    Optimization of Test Conditions for Evaluating Hydrogen Embrittlement Susceptibility of High-Strength Steel for Prestressed Concrete Poles

    (Received 27 June 2019; accepted 5 April 2021)

    Published Online: 29 June 2021

    CODEN: JTEVAB

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    Abstract

    We optimized the test conditions for evaluating the hydrogen embrittlement susceptibility of High-strength steel used in prestressed concrete. Through experiments, we clarified the effects of an applied potential and ammonium thiocyanate (NH4SCN) concentration on hydrogen content. An applied potential of −1.0 V versus Ag-AgCl Electrode (SSE) and an NH4SCN concentration of 1.0 wt. % were optimal for the test. We also determined the dimensions of the test cell and test temperature. Experiments in which we soaked different lengths of specimens and changed the solution volume to specimen area ratio led us to design a test cell with a soaking length of 15 cm and an inner diameter of 8 cm. A test temperature of 50°C was chosen for acceleration of hydrogen embrittlement.

    Author Information:

    Watanabe, Masamitsu
    NTT Device Innovation Center, Nippon Telegraph and Telephone Corporation, Atsugi-shi, Kanagawa

    Fujimoto, Norihiro
    NTT Device Technology Laboratories, Nippon Telegraph and Telephone Corporation, Atsugi-shi, Kanagawa

    Takeuchi, Yosuke
    Tsukuba-shi, Ibaraki

    NTT Device Technology Laboratories, Nippon Telegraph and Telephone Corporation, Atsugi-shi, Kanagawa

    Sawada, Takashi
    NTT Device Technology Laboratories, Nippon Telegraph and Telephone Corporation, Atsugi-shi, Kanagawa


    Stock #: JTE20190542

    ISSN:0090-3973

    DOI: 10.1520/JTE20190542

    Author
    Title Optimization of Test Conditions for Evaluating Hydrogen Embrittlement Susceptibility of High-Strength Steel for Prestressed Concrete Poles
    Symposium ,
    Committee A01