钛在草酸溶液中腐蚀行为的XPS研究

本文首次用X-光电子能谱(XPS)技术研究了H_2C_2O_4溶液中钛基的腐蚀行为, 对Ti基片的表面和界面进行了XPS表征. 实验结果表明:Ti基在80 ℃, 10%的草酸溶液中腐蚀两小时, 样品的表面只有Ti~0和TiO存在; 经过四小时腐蚀的样品表面主要是TiO_2和少部分Ti~(2+). 这与X-衍射分析认为有TiH_(1.042)的结构看法相符。同时, Ti0_2与表面涂层RuO_2都属金红石型结构, 因而完全有可能形成牢固的金属阳极材料。

XPS STUDY OF CORROSION BEHAVIOUR OF TITANIUM IN H2C2O4 SOLUTION

The corrosion behaviour of titanium substance and the XPS characterization of Ti surface in the H_2C_2O_4 solution have been first studied by X-ray photoelectron spec-troscopy. The experimental results show that there are only Ti~0 and Ti~(2+) on sample surface in 10% H_2C_2O_4 solution for two hours corrosion at 80 ℃, but if corrosion is extended to 4 hours, the surface composition is mainly TiO_2 with a small amount of Ti~(2+). This result corresponds to the structure of TiH_(1.942) composion in sample surface found by XRD analysis. Since both TiO_2 and the surface coating RuO_2 are of Gald-Redstone structure, therefore electrode materials of Ti-Ru are stable in chemical industry.