The study of the influence mechanism of platinum group and transition metals on the passivation of Ti alloys
铂族及过渡金属对Ti合金钝化影响机理研究

The electronic structure of Ti alloys has been calculated by the recursion method. Alloying element s Ni, Co, Pt, Ru and Ir were confirmed to segregate on the surface of Ti alloys. Ni and Co atoms formatomic clusters, while Pt, Ru and Ir atoms form the ordered phase with Ti atoms. The microcells are formed between the area with alloying atomic clusters and the region without alloying elements. Ti is dissolved preferentially in the corrosive media, and the enrichment layer on the surface of Ti alloys is form...