Abstract: The tribological behavior and corrosion resistance of glass fibers (GF) and carbon fibers (CF) filled PTFE in both dry condition and sulfuric acid were investigated. In sulfuric acid, the optimal content of fillers was 15 wt %, which resulted in the wear resistance of PTFE/GF and PTFE/CF composites increased 7.7 and 4.4 times based on neat PTFE, respectively. When the filler content was higher than 15 wt %, furrow and abrasive wear constituted the main mechanisms for PTFE composites. Owing to the cooling and lubricating effects of acid media, the friction coefficient of PTFE composites decreased more obvious than that in dry condition. However, the acid inhibited the formation of transfer film on the counterpart.

Key words: poly(tetrafluoroethylene), composite, friction, corrosion, acid solution, wear, carbon fiber, glass fiber