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本研究在保持酸度和温度一致的条件下分别用草酸、硫酸及盐酸对TA2钛基体进行刻蚀处理,研究不同种类酸处理对钛基体及后续电极性能的影响。研究表明:钛基体在草酸和硫酸中的质量损失率要大于在盐酸中的损失率。金相及SEM观察表明:草酸对钛基体刻蚀效果最好,刻痕细致均匀。强化寿命测试结果显示:经草酸处理后的Sn-Sb氧化物涂层钛基电极强化寿命最长。循环伏安测试结果表明:3种酸刻蚀过后的Sn-Sb氧化物涂层电极的析氧电位基本相同,表明酸刻蚀对于该电极的析氧电位影响不大。
In this study, TA2 titanium matrix was etched with oxalic acid, sulfuric acid and hydrochloric acid respectively under the condition of the same acidity and temperature, and the effects of different kinds of acid treatment on the properties of titanium matrix and subsequent electrodes were studied. The results show that the mass loss rate of titanium matrix in oxalic acid and sulfuric acid is greater than that in hydrochloric acid. Metallographic and SEM observations show that oxalic acid has the best etching effect on titanium substrate with fine and uniform scoring. The life-span test results show that the ox-acid-treated Sn-Sb oxide-coated titanium-based electrode has the longest reinforcing life. The results of cyclic voltammetry showed that the oxygen evolving potentials of the Sn-Sb oxide coated electrodes after the three acid etching were almost the same, indicating that acid etching has little effect on the oxygen evolution potential of the electrode.