Effect of high-pressure hydrogen exposure on wear of polytetrafluoroethylene sliding against stainless steel

K. Nakashima, A. Yamaguchi, Y. Kurono, Yoshinori Sawae, T. Murakami, Joichi Sugimura

    研究成果: Contribution to journalArticle査読

    19 被引用数 (Scopus)

    抄録

    Mechanical components in hydrogen energy systems, such as a fuel cell vehicle and related infrastructures, will operate in high-purity hydrogen. Especially, some seals and valves in fuel cell vehicles should articulate against metal counterface within a pressurized hydrogen gas. However, the effect of high-pressure hydrogen gas on tribological behaviour of materials used in sliding surfaces has not been identified yet. In this study, unfilled polytetrafluoroethylene (PTFE) pins and 316L austenitic stainless-steel discs were exposed to high-pressure hydrogen gas and then the chemical and physical changes in their surface and the tribological characteristics were investigated. The results of an X-ray photoelectron spectrometer analysis of the exposed stainless-steel surface indicated that metal oxides in the passive surface layer of stainless steel can be reduced significantly during the high-pressure hydrogen exposure. Increased metal contents of the stainless surface resulted in enhanced metal fluoride formation and subsequent development of a PTFE transfer film. Consequently, the exposed PTFE specimens showed lower specific wear rate when compared to the unexposed specimen.

    本文言語英語
    ページ(範囲)285-292
    ページ数8
    ジャーナルProceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology
    224
    3
    DOI
    出版ステータス出版済み - 1 1 2010

    All Science Journal Classification (ASJC) codes

    • 機械工学
    • 表面および界面
    • 表面、皮膜および薄膜

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