Abstract
A photon rupture method, by which oxide film can be removed by focused, pulsed Nd-YAG laser beam irradiation, applied to investigate localized repair of passive oxide films of titanium. The specimens were irradiated with a focused pulse of a pulsed Nd - YAG laser beam at a constant potential in 8.1 mol/m3 Na2HPO4/ 5 mol/m3 KH2PO4 solutions with 140 mol/m3 NaCl + 50 mol/m3 KCl (PBS) or with different chloride concentrations, and the current transients were monitored. The current increases with increasing applied potential and chloride concentration. The oxide film, however, repairs in all experimental conditions. The oxide film formation kinetics did not follow the inverse logarithmic law according to Cabrera- Mott theory.
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