<研究論文>チタンおよびチタン合金の溶存酸素還元挙動 : 過酸化水素水による前処理

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In order to determine the electrochemical properties of Ti and Ti-6A1-4V electrode surfaces, due to 3% H_2O_2 surface treatments, potentiodynamic tests were run in 40mM NaCl, 20mM CaCl_2 and 40mM Phosphate (pH 7.0) solutions. 3% H_2O_2 surface treatments yielded more noble open-circuit potential values than those acquired by the only polished electrodes and the potential values were strongly dependent on the electrolyte in the solutions. This indicated that the growth of oxide at the electrode surfaces occurred not only in 3% H_2O_2 pretreatment solutions but also in the electrolyte solutions not contained H_2O_2. The reduction of dissolved oxygen at Ti and Ti-6A1-4V electrode with both anodic and cathodic scan and the activation caused by cathodic treatment were suppressed with the 3% H_2O_2 surface treatments.
2002-12-25