Friction and wear of bronze filled PTFE and graphite filled PTFE in 40 MPA hydrogen gas

Yoshinori Sawae, Eiichi Miyakoshi, Shunichiro Doi, Hideki Watanabe, Yoshie Kurono, Joichi Sugimura

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

    10 Citations (Scopus)


    Several kinds of Polytetrafluoroethylene (PTFE) composites are currently being used in reciprocating hydrogen gas compressors as seal material which should articulate against metal counterfaces in pressurized hydrogen gas. Although their friction and wear behavior has large impact on the efficiency and reliability of gas compressors, available information about tribological characteristics of PTFE composites in high pressure hydrogen gas is quite limited. In this study, friction and wear of graphite filled PTFE and bronze filled PTFE were evaluated in the 40 MPa hydrogen gas environment by using a pin-on-disk type apparatus enclosed in a high pressure vessel to supply experimental data for the design of gas compressors in hydrogen fuelling stations. AISI316L austenitic stainless steel disk was used as a sliding counterface. All experiments were conducted under dry condition with the average contact pressure of 1.8 MPa, the sliding speed of 100 mm/s and the gas temperature of 327 K. The friction force exerted between PTFE composites and stainless steel was evaluated by a load cell during the experiment and the wear rate of composites was evaluated from the weight loss of pin specimens. In addition, chemical analysis of the polymer transfer film formed on the disk surface were conducted by using X-ray photoelectron spectrometer. Friction and wear tests were also conducted in 40 MPa helium gas for comparison. Results indicated that bronze filled PTFE was more sensitive to the gas pressure and gas species; it showed good friction and wear behavior in high pressure hydrogen, although friction in high pressure helium became very high. On the other hand, the effects of high pressure gas environment were relatively small for the friction and wear of graphite filled PTFE.

    Original languageEnglish
    Title of host publicationASME/STLE 2011 International Joint Tribology Conference, IJTC 2011
    Number of pages3
    Publication statusPublished - 2011
    EventASME/STLE 2011 International Joint Tribology Conference, IJTC 2011 - Los Angeles, CA, United States
    Duration: Oct 24 2011Oct 26 2011

    Publication series

    NameAmerican Society of Mechanical Engineers, Tribology Division, TRIB


    OtherASME/STLE 2011 International Joint Tribology Conference, IJTC 2011
    Country/TerritoryUnited States
    CityLos Angeles, CA

    All Science Journal Classification (ASJC) codes

    • Mechanical Engineering
    • General Materials Science


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