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首页> 外文期刊>Journal of solid state electrochemistry >Correlation between amount of bound water and stability of passive film on Ti during passivation time in sulfuric acid solution
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Correlation between amount of bound water and stability of passive film on Ti during passivation time in sulfuric acid solution

机译：硫酸溶液钝化过程中结合水量与钝化膜上Ti钝化膜稳定性的关系

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We have tried to detect the bound water in the passive film sensitively using thermal desorption gas spectroscopy (TDS) equipped with a quadrupole mass spectrometer and investigated the effect of bound water on stability of the passive film formed on Ti. Ti was electrochemically passivated in a dilute sulfuric acid solution for several periods. The passivated specimens were subjected to two methods for evaluating properties of the passive film: One was the TDS method to determine an amount of bound water in the film, and the other was a conventional electrochemical potentiokinetic method in a sodium bromide solution to determine a pitting potential corresponding to stability of the film. As a result, the TDS successfully and quantitatively detected three states of bound water from the passive film on Ti. As a passivation time increased, a pitting potential of Ti shifted to more positive direction and an amount of bound water increased. In other words, improvement to stability of the passive film was achieved by increasing the amount of bound water in the film. The finding was the opposite result from stainless steels.
机译：我们尝试使用配备四极质谱仪的热脱附气相色谱（TDS）灵敏地检测钝化膜中的结合水，并研究结合水对Ti上形成的钝化膜稳定性的影响。 Ti在稀硫酸溶液中被电化学钝化了数个时期。钝化的样品经受两种方法来评估钝化膜的性能：一种是TDS方法来确定膜中结合水的量，另一种是常规的在溴化钠溶液中的电化学电位动力学方法来确定点蚀。电位对应于薄膜的稳定性。结果，TDS成功并定量地从Ti上的钝化膜中检测出结合水的三种状态。随着钝化时间的增加，Ti的点蚀电位移向更正的方向，并且结合水的量增加。换句话说，通过增加膜中的结合水量来实现无源膜的稳定性的改善。这一发现与不锈钢相反。

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