摘要
为了解决电子池材料改性TiO2涂层暗态下无阴极保护作用的问题,用溶胶-凝胶法及浸渍提拉技术在304不锈钢表面制备了纳米TiO2-WO3复合涂层与纳米TiO2/WO3叠层涂层,用扫描电镜(SEM)、X射线光电子能谱仪(XPS)研究了2种涂层的表面形貌、成分,并用电化学方法研究了2种涂层的光阴极保护特性及耐腐蚀性能。结果表明:2种涂层表面均连续均匀,由Ti,W,O,C组成;紫外光照1 h时2种涂层均对304不锈钢有一定的光阴极保护作用,闭光后纳米TiO2/WO3叠层涂层的延时阴极保护作用远好于纳米TiO2-WO3复合涂层;2种涂层均对304不锈钢有防腐蚀作用,紫外光照射时纳米TiO2-WO3复合涂层的防腐蚀性比纳米TiO2/WO3叠层涂层的好。
Nanoscale TiO2-WO3 composite coating and TiO2/WO3 laminated coating were prepared on the surface of 304 stainless steel using sol-gel method as well as dipping and drawing method.The morphology and composition of the two kinds of ceramic coatings were analyzed by means of scanning electron microscopy and X-ray diffraction.The cathode protection performance of the two coatings under ultraviolet(UV) irradiation and their corrosion resistance were examined using electrochemical method.It was found that the two kinds of as-prepared ceramic coatings both had continuous and smooth surfaces,and consisted of Ti,W,O and C.They both showed a certain degree of cathode protection performance for 304 stainless steel under UV irradiation of 1 h,and the TiO2/WO3 laminated coating had much better protective performance than the compo-site coating when the UV source was turned off.In the meantime,both the two kinds of coatings were able to improve the corrosion resistance of the stainless steel,and the composite coating possessed better corrosion resistance than the laminated coating under UV irradiation.
出处
《材料保护》
CAS
CSCD
北大核心
2012年第1期20-22,78,共3页
Materials Protection
基金
广东省科技计划项目(2005B16001028)
湖南省教育厅青年项目(11B054)
湖南理工学院校级科研项目(2011Y03)
