华南理工大学学报（自然科学版） ›› 2009, Vol. 37 ›› Issue (6): 1-6.

• 化学化工 •    下一篇

纳米TiO2／SnO2涂层的制备与光阴极保护性能

曾振欧1  周民杰1  钟理1  赵国鹏2   

  1. 1. 华南理工大学 化学与化工学院, 广东 广州 510640； 2. 广州市 二轻工业科学技术研究所, 广东 广州 510170
  • 收稿日期:2008-08-02 修回日期:2008-09-28 出版日期:2009-06-25 发布日期:2009-06-25
  • 通信作者: 曾振欧（1955-），男，教授，主要从事应用电化学研究． E-mail:zhouzeng@scut．edu．cn
  • 作者简介:曾振欧（1955-），男，教授，主要从事应用电化学研究．
  • 基金资助:

    广东省科技计划项目（2005816001028）;广州市科技攻关项目（0552108002）

Preparation and Photo-Cathodic Protection Properties of Nano-Sized TiO2/SnO2 Coatings

Zeng Zhen-ou1  Zhou Min-jie1  Zhong Li1  Zhao Guo-peng2   

  1. 1. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China; 2. Guangzhou Etsing Plating Research Institute, Guangzhou 510170, Guangdong, China
  • Received:2008-08-02 Revised:2008-09-28 Online:2009-06-25 Published:2009-06-25
  • Contact: 曾振欧（1955-），男，教授，主要从事应用电化学研究． E-mail:zhouzeng@scut．edu．cn
  • About author:曾振欧（1955-），男，教授，主要从事应用电化学研究．
  • Supported by:

    广东省科技计划项目（2005816001028）;广州市科技攻关项目（0552108002）

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摘要： 采用溶胶-凝胶法在304不锈钢表面制备了纳米TiO2／SnO2叠层涂层．通过测量稳定电位研究了涂层的光电化学性能和光阴极保护特性，用扫描电子显微镜、x射线衍射和x射线光电子能谱对涂层的表面形貌、晶体结构与组成进行了表征．结果表明：纳米TiO2表层与纳米SnO2内层分别浸渍提拉4次制得的叠层涂层具有最好的光电化学效应、储存电子性能与光阴极保护作用，紫外光照1h的延时阴极保护作用可达7h；纳米叠层涂层表面连续、均匀致密；TiO2为锐钛矿型，SnO2为金红石型；涂层表面与内层均由Ti、Sn、0和C元素组成．文中还探讨了纳米TiO2／SnO2叠层涂层的光阴极保护作用机理．

关键词: 纳米TiO2 纳米SnO2 光电化学, 光阴极保护, 腐蚀防护

Abstract:

Nano-sized double-layer TiO2/SnO2coatings were prepared on Type 304 stainless steel substrate via the sol-gel method. The ＂photo-electrochemical effect and photo-cathodic protection properties of the coatings were then investigated by measuring the stable potential. Moreover, the surface morphology, structure and composition of the prepared coatings were characterized by means of SEM, XRD and XPS. The results show that  the nano-sized double-layer TiO2/SnO2 coatings prepared by dipping TiO2 and SnO2 coatings respectively for 4 times are of the best photo-electrochemical effect, charge-storage capability and photo-cathodic protection properties, which provides the coated Type 304 stainless steel with a cathodic protection lasting 7 h after the irradiation by UV illumination for 1 h ;  the coatings are uniform and compact, with continuous surface, anatase TiO2 and rutile SnO2; and  both the outer and the inner layers of the coatings are composed of Ti, Sn, C and O. The mechanism of photo-cathodic protection of the nano-sized TiO2/SnO2 coatings is also discussed in the paper.

Key words: nano-sized titanium dioxide, nano-sized tin dioxide, photo-electrochemistry, photo-cathodic protection, corrosion protection

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