Abstract
It is important to understand the tribological characteristics of polymeric sealing materials, such as PTFE, sliding against metal counter face in the hydrogen environment to establish a design guideline for hydrogen energy systems. The aim of this study is investigating effects of hydrogen on the formation of PTFE transfer films and subsequent friction and wear behaviors. Our experimental results indicated two different effects of hydrogen. One is a promotion of the transfer film formation due to the reduction of surface oxide layer of the metal counterface, and the other is an interruption of the adsorption of PTFE molecules on the metal surface.
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