钛在H2O2溶液中的腐蚀特性研究

通过分光光度计测定腐蚀后溶液中钛离子浓度的方法，研究了钛在H2O2溶液中的腐蚀特性，以及不同pH值条件下，K^＋，Ca^2＋，Na^＋，Mg^2＋，Cl^-，HPO4^2-，H2PO4^-等添加离子对钛腐蚀的影响。结果表明：Ca^2＋对钛腐蚀具有最强的抑制性，而HPO4^2-则具有最强的促进作用。分析认为：Ca^2＋通过吸附到钛表面形成CaTiO3或者CaO2来抑制钛的腐蚀：而HPO4^2-则是吸附到钛表面来增加表面氧化膜的缺陷，从而促进钛的腐蚀。

Corrosion Behavior of Titanium in Hydrogen Peroxide Solutions

The corrosion behavior of titanium in hydrogen peroxide solutions was studied by measuring the titanium ions concentration using spectrophotometer.The influence of additives(K+,Ca2+,Na+,Mg2+,Cl-,HPO42-,H2PO4-)on the corrosion behavior of titanium was discussed under different pH conditions.The results indicated that Ca2+ exhibited the highest inhibition to the titanium corrosion in hydrogen peroxide solutions.However,HPO42-behaved as an accelerator to the corrosion.It was considered that the Ca2+ inhibited the titanium corrosion probably by absorbed on the titanium surface to form a thin film of CaTiO3 or CaO2.The HPO42-accelerated the titanium corrosion,however,probably by increasing the defects of surface oxide films after absorption on the titanium surface.