Corrosion protection of 316 L stainless steel by a TiO2 nanoparticle coating prepared by sol-gel method

被引:294
作者
Shen, GX [1 ]
Chen, YC [1 ]
Lin, CJ [1 ]
机构
[1] Xiamen Univ, Dept Chem, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Peoples R China
基金
中国国家自然科学基金;
关键词
TiO2 nanoparticle coatings; 316 L stainless steel; corrosion protection; photoelectrochemical performance;
D O I
10.1016/j.tsf.2005.05.016
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A uniform and TiO2 nanoparticle coating on steels has been prepared using sol-gel method and hydrothermal post-treatments. The morphology and structure of the coatings were analysed using atomic force microscopy and X-ray diffraction. The anticorrosion performances of the coatings in dark and under ultraviolet illumination have been evaluated by using electrochemical techniques. The influences of coating thickness, pH and NaCl concentration on corrosion protection have been examined as well. The results indicate that the TiO2 nanoparticle coatings on steels exhibit an excellent corrosion resistance due to a ceramic protective barrier on metal surface in dark, and a photo-generated cathodic protection current under UV illumination. The electrochemical impedance spectroscopy measurements provide an explanation to the increased resistance of nano TiO2 particles coated 316 L stainless steel against corTosion. (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码:130 / 136
页数:7
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