目的：制备TiO2/玻璃鳞片复合颗粒以改善玻璃鳞片与涂层的界面性能,提高复合涂层的抗渗透能力。方法利用溶胶回流法在玻璃鳞片表面制备一层TiO2薄膜,通过SEM,EDS以及XPS等技术表征TiO2薄膜的表面状态。制备复合涂层,利用EIS和盐雾试验测试TiO2/玻璃鳞片的抗渗透能力,并与玻璃鳞片的抗渗透性进行对比。结果玻璃鳞片表面被TiO2薄膜包覆, TiO2薄膜与玻璃鳞片表面以Si—O—Ti化学键连接,浸泡15 d后,玻璃鳞片涂层的Zw 为8781Ω,TiO2/玻璃鳞片涂层的Zw 为75234Ω。盐雾试验后,TiO2/玻璃鳞片涂层下的金属几乎没有腐蚀。结论玻璃鳞片经过TiO2包覆后,具有较强的抗渗透能力。
ABSTRACT:Objective To prepare TiO2/glass flake composite particles in order to improve the interface properties of glass flake and the coating, and enhance the anti-penetration capability of the composite coating. Methods A layer of TiO2 film was prepared on the surface of glass flake by Sol-refluxing method, and the surface state of the TiO2 film was characterized by SEM,EDS and XPS. The composite coating was prepared and its anti-penetration ability was tested by EIS and salt spray test, and contrasted with that of glass flake. Results The surface of glass flake was coated by TiO2 film, and the TiO2 film connected with glass flake through Si—O—Ti chemical bond. After immersing in salt solution for 15 d, Zw of glass flake coating was 8781 Ω,and that of TiO2/glass flake coating was 75234Ω. After salt spray test, the metal protected by TiO2/glass flake coating was nearly not corroded. Conclu-sion The glass flake, coated by TiO2 film, had strong anti-penetration ability.
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