热处理对TiO_2涂层结构及耐蚀性能的影响  

Effect of Heat Treatment on Crystal Structure and Corrosion Resistance of TiO_2 Coating

作　　者：朱晓东[1] 冯威[1] 周家荣[2] 毛涛[1] 

机构地区：[1]成都大学机械工程学院,四川成都610106 [2]中国十九冶集团有限公司,四川成都611730

出　　处：《热加工工艺》2016年第14期201-203,207,共4页Hot Working Technology

基　　金：四川省科技厅应用基础项目(2014JY0119);成都大学校青年基金项目(2013XJZ19)

摘　　要：采用溶胶凝胶-浸渍提拉法在301不锈钢上制备了TiO_2涂层,分别将涂层在350、450、550℃条件下热处理。采用XRD、SEM对涂层进行晶型结构和形貌表征;采用Tafel曲线对涂层进行耐腐蚀性能测试。结果表明,随热处理温度升高,晶粒尺寸长大,晶型结构逐渐完整。350、450℃热处理后TiO_2全部为锐钛矿相。550℃热处理后TiO_2大部分以锐钛矿相存在,有少量金红石相生成。在光照条件下,涂层都有一定的阴极保护作用,经过450℃热处理的TiO_2涂层阴极保护作用最好。TiO2 coatings were prepared on 301 stainless steel by sol-gel and dip-coating method. The heat treatment at 350, 450, 550℃ was proceeded on the coatings. The crystal structure, morphology, corrosion resistance of the coatings were characterized by XRD, SEM and Tafel curves. The results show that the grain size of TiO2 grows tip and the crystalline structure becomes perfect with increasing heat treatment temperature. The whole crystal structure of TiO2 is anatase when heat-treated at 350℃ and 450℃. There is a little ruffle when heat-treated at 550℃, but the crystal structure of TiO2 is mainly anatase. TiO2 coatings are able to create catholic protection effect under the condition of illumination. The coating at 450℃ heat treatment has the best catholic protection effect.

关 键 词：TIO2涂层 301不锈钢 热处理 阴极保护 

分 类 号：TG174.45[金属学及工艺—金属表面处理]