Photocatalystic Cathodic Protection of TiO2 Coating on AZ31 Magnesium Alloy
Nano TiO2 and S, N co-doped TiO2 composite coatings with WO3 transitional layer were deposited on AZ31 magnesium alloy by sol-gel method. The morphologies, structure, mechanical properties, compositional depth profiles and anti-corrosion performance of the as prepared coatings were characterized by scanning electron microscope, X-ray diffraction, nanoscratch test, glowing discharge optical emission spectrometry and electrochemical method, respectively. The results show that the nano TiO2 coatings are continuous, uniform and dense with thickness ca.3-5μm, elements in the interface diffuse mutually during heat treatment; S-N co-doped TiO2 enhances the interface adhesion, WO3 transitional layer increases the total coating thickness and strengthens the adhesion to substrate with respect to unitary TiO2 coating; S, N co-doped TiO2 acts as visible light photocatalyst that can provide permanent cathodic protection for AZ31 magnesium using WO3 as electron restoring material.
TiO2 coating photocatalyst cathodic protection magnesium alloy sol-gel
WANG Zhen-lin
Materials Science and Engineering College, Chongqing University of Technology, Chongqing, China, 400054
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
280-286
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）