Abstract
The dynamic corrosion behavior of ZTi60 in neutral NaCl solutions containing various F- concentrations was investigated using a rapid scratching equipment, and the effect of F- ions and mechanical scratches on passive film was discussed based on point–defect model. The results indicate that when F- concentrations are higher than critical value, F- ions can migrate from film/solution interface into passive film, and form fluorine-titanium complex. However, the critical F– concentrations for the intact and scratched Ti surface are different. The scratched surface with higher defect density and enrichment of F– around the scratched areas can be damaged at lower F– concentrations.
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