Tribological characterization of polymeric sealing materials in high pressure hydrogen gas

Yoshinori Sawae, Kanao Fukuda, Eiichi Miyakoshi, Shunichiro Doi, Hideki Watanabe, Kazuhiro Nakashima, Joich Sugimura

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

    2 Citations (Scopus)

    Abstract

    Bearings and seals used in fuel cell vehicles and related hydrogen infrastructures are operating in pressurized gaseous hydrogen. However, there is a paucity of available data about the friction and wear behavior of materials in high pressure hydrogen gas. In this study, authors developed a pin-on-disk type apparatus enclosed in a high pressure vessel and characterized tribological behavior of polymeric sealing materials, such as polytetrafluoroethylene (PTFE) based composites, in gaseous hydrogen pressurized up to 40 MPa. As a result, the friction coefficient between graphite filled PTFE and austenitic stainless steel in 40 MPa hydrogen gas became lower compared with the friction in helium gas at the same pressure. The chemical composition of worn surfaces was analyzed by using X-ray photoelectron spectrometer (XPS) after the wear test. Results of the chemical analysis indicated that there were several differences in chemical compositions of polymer transfer film formed on the stainless disk surface between high pressure hydrogen environment and high pressure helium environment. In addition, the reduction of surface oxide layer of stainless steel was more significant in high pressure hydrogen gas. These particular effects of the pressurized hydrogen gas on the chemical condition of sliding surfaces might be responsible for the tribological characteristics in the high pressure hydrogen environment.

    Original languageEnglish
    Title of host publicationSTLE/ASME 2010 International Joint Tribology Conference, IJTC2010
    Pages251-253
    Number of pages3
    DOIs
    Publication statusPublished - Dec 1 2010
    EventSTLE/ASME 2010 International Joint Tribology Conference, IJTC2010 - San Francisco, CA, United States
    Duration: Oct 17 2010Oct 20 2010

    Publication series

    NameAmerican Society of Mechanical Engineers, Tribology Division, TRIB

    Other

    OtherSTLE/ASME 2010 International Joint Tribology Conference, IJTC2010
    CountryUnited States
    CitySan Francisco, CA
    Period10/17/1010/20/10

    All Science Journal Classification (ASJC) codes

    • Mechanical Engineering
    • Materials Science(all)

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