Wear of unfilled PTFE in gaseous hydrogen

Yoshinori Sawae, Akira Yamaguchi, Shunichiro Doi, Kazuhiro Nakashima, Teruo Murakami, Yoshie Kurono, Joichi Sugimura

    Research output: Contribution to journalArticlepeer-review

    10 Citations (Scopus)


    Unfilled polytetrafluoroethylene (PTFE) was considered as a representative polymeric sealing material for reciprocating gas compressors and regulator valves in fuel cell vehicles and related hydrogen infrastructures, and its wear behavior in gaseous hydrogen was evaluated by using 3pin-on-disk wear tester coupled with the environmental test chamber. SUS316 austenitic stainless steel was used as sliding counterface material and the PTFE transfer film formation on the stainless steel surface was evaluated by X-ray photoelectron spectroscopy (XPS). Results indicated that the specific wear rate of unfilled PTFE became significantly smaller in gaseous hydrogen compared with that in air. However, the specific wear rate in hydrogen became higher than that in argon gas in some experiments with relatively high sliding speeds. Strong correlation was obtained between the wear rate and the amount of PTFE transfer film evaluated by the XPS analysis. PTFE wear rate increased with decreasing the PTFE transfer film formed on the disk surface. Consequently, the increased wear rates of PTFE were caused by the reduced transfer film formation in gaseous hydrogen.

    Original languageEnglish
    Pages (from-to)710-718
    Number of pages9
    JournalToraibarojisuto/Journal of Japanese Society of Tribologists
    Issue number10
    Publication statusPublished - 2009

    All Science Journal Classification (ASJC) codes

    • Mechanics of Materials
    • Mechanical Engineering
    • Surfaces and Interfaces
    • Surfaces, Coatings and Films
    • Materials Chemistry


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