Abstract
Ti binary alloys containing 10wt% noble metal elements of Ag, Au, Pd, or Pt were prepared to obtain the different phase structures. The metallurgical phase structures and corrosion behavior of Ti alloys were investigated. From the ac impedance data analysis, the passivation model on Ti alloys was established and electrochemical parameters of stratified layers were obtained. The stratified layers successively consisted of the metal defect, inner, intermediate, and outer layers on the surface of Ti alloys. The properties of outer layer played an important role on the initial galvanic corrosion.
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