Corrosion behaviors and mechanisms of in-situ Ti-based MGMCs in chloride-containing and chloride-free solutions
Abstract The corrosion behavior of Ti 62 Zr 12 V 13 Cu 4 Be 9 metallic glass matrix composites (MGMCs) in chloride-containing (NaCl and HCl) and chloride-free (NaOH and H 2 SO 4 ) solutions was studied. As a result, Ti 62 Zr 12 V 13 Cu 4 Be 9 MGMCs exhibits better corrosion resistance in chloride-free solutions due to the formation of oxide layer. In comparison, the oxide layer formed in NaOH solution is superior to that formed in H 2 SO 4 solution according to the analysis results of XPS and EIS. The irregularity of elemental and phase distribution in this Ti-based MGMCs material is considered the driving force of the corrosion process. With the inclusion of other factors such as the different pH values and the cathodic reaction, rather reasonable interpretation about the difference of corrosion behaviors of Ti-based MGMCs samples in various media is proposed.