纯Mg表面TiO2薄膜的耐蚀性研究  

Study on Corrosion Resistance of TiO_2 Films on the Pure Mg Surface

作　　者：谢奉妤[1,2] 高家诚[1,2] 胡德[1,2] 张敏[1,2] 

机构地区：[1]重庆大学国家镁合金材料工程技术研究中心,重庆400030 [2]重庆大学材料科学与工程学院,重庆400045

出　　处：《材料导报》2012年第4期18-21,共4页Materials Reports

基　　金：国家科技支撑计划(2007BAQ00134-04)

摘　　要：以四氯化钛为前驱体,去离子水为溶剂,盐酸为抑制剂,采用溶胶-凝胶法制得TiO2溶胶。采用浸渍-提拉技术在纯镁基体上制得TiO2薄膜,以提高纯镁基体的耐蚀性。通过正交实验,以电化学阻抗值作为评价标准,研究了热处理温度、涂层次数、溶胶浓度对试样耐腐蚀性的影响。结果表明,溶胶浓度为0.5%、涂层次数为3、热处理温度为100℃时得到的TiO2薄膜具有最好的耐蚀性。TiO2 sol, prepared by sol-gel technique using titanium tetrachloride as precursor, deionized water as solvent and HC1 as inhibiter, was coated on pure magnesium（Mg） by the method of dip-coating to improve the matrix corrosion resistance. The effects of the heat-treatment temperature, coating times and sol concentration on the corrosion resistance of the samples were investigated by the orthogonalizing analysis, where electrochemical impedance va- lue was chosen as evaluation criteria. According to the results, the optimal synthesis route was 0. 5% sol concentration, 3 coating times, and 100℃ heat-treatment temperature where TiO2-coated Mg had the best corrosion resistance.

关 键 词：二氧化钛 纯MG 腐蚀 电化学阻值 

分 类 号：TG174.4[金属学及工艺—金属表面处理]