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

摘要

This study investigated the tribological properties of Cu36Zr48Ag8Al8 BMG against Cu36Zr48Ag8Al8 BMG under H2SO4 corrosive conditions with different concentrations. Results show that Cu36Zr48Ag8Al8 BMG exhibits good tribological behaviors under H2SO4 conditions. Especially, when the material was soaked in 15 wt% H2SO4 solution, the friction coefficient and wear rate can be as low as 0.10 +/- 0.01 and (0.28 +/- 0.23) x 10(-6) mm(3)N(-1) m(-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 H2SO4 solution and dissolution reaction products (Al-2(SO4)(3) and CuSO4) on the worn surfaces. These perfect properties promote Cu36Zr48Ag8Al8 BMG to have the promise to replace the stainless steel under H2SO4 corrosive condition.