Abstract
The corrosion resistance of titanium surface-alloyed with palladium and nitrogen obtained by different techniques of surface modification was investigated in a simulated physiological solution. Ti–Pd laser-surface-alloys were prepared by ion beam and laser beam techniques, whereas TiN surface-alloys were obtained by laser-gas-alloying. The results proved that the Ti–Pd surface-alloys have the better corrosion resistance in the quasi-active state. In the passive state, stable surface-alloys prepared by ion-beam-mixing (2×10 16 Ne +/cm 2) have the best corrosion resistance. The mechanism by which palladium increased the corrosion resistance of titanium is based on the mixed-potential theory.
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