Corrosion properties and mechanism of Ti43Zr27Mo5Cu10Be15 amorphous composites in various conditions

Abstract The in situ Ti 43 Zr 27 Mo 5 Cu 10 Be 15 amorphous composites were investigated for their corrosion properties in solutions of NaCl, HCl, H 2 SO 4 and NaOH. Electrochemical testing, SEM, EDS and XPS analyses revealed that pitting in NaCl and HCl solutions caused local surfaces damage. Amorphous matrix corrodes slightly in H 2 SO 4 solution. Uniform corrosion occurred in NaOH solution without passive film formed, leading to the worst corrosion resistance. The optimal corrosion performances for NaCl and HCl solution are achieved at 0.5 mol l −1 and 0.75 mol l −1 separately which is related to the shortage of oxygen content in the solutions. While, the best corrosion performances for H 2 SO 4 and NaOH solution are at 0.25 mol l −1 . Moreover, the research on the effect of temperature was conducted in 3.5 wt% NaCl solution, it was found that Ti 43 Zr 27 Mo 5 Cu 10 Be 15 amorphous composites exhibited good corrosion resistance at 298 K, while the E corr declined with increasing solution temperature.