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- Title
Effect of Potential, Temperature, and Fluoride Ions on the Repassivation Kinetics of Titaniumin Phosphate Buffered Saline Solution with the Photon Rupture Method.
- Authors
Sakairi, Masatoshi; Miyata, Hiroomi; Kikuchi, Tatsuya; Takahashi, Hideaki
- Abstract
The effect of the applied potentials, temperature, and F- ions on the localized repassivation kinetics of titanium was investigated by the photon rupture method, PRM, and electrochemical techniques in phosphate buffered saline solution. The log I versus log t plots after laser beam irradiation showed a rapid increase, then a decrease with a slope of about -1.5, which is steeper than that expected from high field oxide film formation theory, suggesting that the repassivation of titanium is a combination of electrochemical and chemical reactions. The repassivation current increases with increases in the applied potential and addition of F- ions, while solution temperature does not influence the repassivation kinetics. The effect of F- ions on the repassivation kinetics can be explained by localized pH changes caused by very rapid dissolution of titanium when titanium was exposed to PBS solution.
- Subjects
IONS; FLUORIDES; TITANIUM; PHOSPHATES; BUFFER solutions; CHEMICAL reactions
- Publication
Laser Chemistry, 2009, Vol 2009, p1
- ISSN
0278-6273
- Publication type
Article
- DOI
10.1155/2009/436065