Effect of ammonia impurity on hydrogen embrittlement of scm440 low-alloy steel in hydrogen gas

Zhang Nan, Ryosuke Komoda, Kazuki Yamada, Cynthia A. Volkert, Lin Tian, Reiner Kirchheim, Petros Sofronis, S. Hosseinisarani Zahra, Mohsen Dadfarnia, Masanobu Kubota, Aleksandar Staykov

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Ammonia (NH3) was added to hydrogen gas as an impurity, then hydrogen embrittlement (HE) of the SCM440 low-alloy steel was investigated by fracture toughness tests. NH3 showed inhibition of the HE when the loading rate was relatively high. However, the inhibitory effect decreased with the decrease in the loading rate, as well as with an increase in the gas pressure. It was found that NH3 acted as both an inhibitor of the HE and a cause of the HE depending on the loading rate and gas pressure.

    Original languageEnglish
    Title of host publication30th International Ocean and Polar Engineering Conference
    PublisherInternational Society of Offshore and Polar Engineers
    Pages3030-3035
    Number of pages6
    ISBN (Electronic)9781880653845
    Publication statusPublished - 2020
    Event30th International Ocean and Polar Engineering Conference, ISOPE 2020 - Virtual, Online
    Duration: Oct 11 2020Oct 16 2020

    Publication series

    NameProceedings of the International Offshore and Polar Engineering Conference
    Volume2020-October
    ISSN (Print)1098-6189
    ISSN (Electronic)1555-1792

    Conference

    Conference30th International Ocean and Polar Engineering Conference, ISOPE 2020
    CityVirtual, Online
    Period10/11/2010/16/20

    All Science Journal Classification (ASJC) codes

    • Energy Engineering and Power Technology
    • Ocean Engineering
    • Mechanical Engineering

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