Tribological behaviors of self‒mated Cu36Zr48Ag8Al8 bulk metallic glass under H2SO4 conditions with different concentrations.

This study investigated the tribological properties of Cu 36 Zr 48 Ag 8 Al 8 BMG against Cu 36 Zr 48 Ag 8 Al 8 BMG under H 2 SO 4 corrosive conditions with different concentrations. Results show that Cu 36 Zr 48 Ag 8 Al 8 BMG exhibits good tribological behaviors under H 2 SO 4 conditions. Especially, when the material was soaked in 15 wt% H 2 SO 4 solution, the friction coefficient and wear rate can be as low as 0.10 ± 0.01 and (0.28 ± 0.23) × 10−6 mm3 N−1m−1. It is mainly attributed to the existence of metal oxide films formed by surface oxidation and passivation actions as well as the fluid lubricating films formed by H 2 SO 4 solution and dissolution reaction products ( A l 2 (S O 4) 3 and CuS O 4 ) on the worn surfaces. These perfect properties promote Cu 36 Zr 48 Ag 8 Al 8 BMG to have the promise to replace the stainless steel under H 2 SO 4 corrosive condition. • Cu 36 Zr 48 Ag 8 Al 8 BMG possess higher corrosion resistance than 316 SS in H 2 SO 4 solution. • Self–mated BMG present low friction and wear rate under H 2 SO 4 conditions. • The formed metal oxides films and fluid lubricant films improve the tribological properties. • The formed metal oxides films promote BMG to have high corrosion resistance. • Metal oxides films and fluid lubricant films are changed with the variation of solutions. [ABSTRACT FROM AUTHOR]