Nanoporous titania interlayer as reservoir of corrosion inhibitors for coatings with self-healing ability
Nanoporous titania interlayer as reservoir of corrosion inhibitors for coatings with self-healing ability
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DOI：
10.1016/j.porgcoat.2006.08.029
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发表时间：
2007-02-01
影响因子：
6.6
通讯作者：
Ferreira, M. G. S.
中科院分区：
文献类型：
--
作者：
Lamaka, S. V.;Zheludkevich, M. L.;Ferreira, M. G. S.
AA2024-T3 合金的主动腐蚀保护是由环境友好、粘附性良好的预处理系统提供的，该系统由负载抑制剂的氧化钛多孔层和基于溶胶-凝胶的混合薄膜组成。提出了一种旨在开发用于在金属/涂层界面上储存腐蚀抑制剂的纳米多孔储库的新方法。在模板剂存在下，通过钛醇盐的可控水解，在铝合金表面制备了纳米结构多孔TiO2中间层。采用 TEM、EDS、SEM 和 AFM 技术对 TiO2 薄膜的形貌和结构进行了表征。讨论了预处理涂层中抑制剂的不同负载方式。与将抑制剂直接嵌入溶胶-凝胶基质中相比，多孔储层的使用消除了抑制剂对混合溶胶-凝胶基质稳定性的负面影响。 EIS 和 SVET 测量证实，TiO2/抑制剂/溶胶-凝胶系统显示出增强的腐蚀防护和自愈能力。 (C) 2006 年由 Elsevier B.V. 出版
Active corrosion protection of AA2024-T3 alloy has been provided by an environmental-friendly, well adhering pre-treatment system consisting of an inhibitor-loaded titanium oxide porous layer and a sol-gel based thin hybrid film. A novel approach aimed at developing a nanoporous reservoir for storing of corrosion inhibitors on the metal/coating interface has been proposed. The nanostructured porous TiO2 interlayer was prepared on the aluminium alloy surface by controllable hydrolysis of titanium alkoxide in the presence of template agent. The morphology and the structure of the TiO2 film were characterized with TEM, EDS, SEM, and AFM techniques. Different ways of loading of the inhibitor in the pre-treatment coating were discussed. In contrast to direct embedding of the inhibitors into the sol-gel matrix, the use of the porous reservoir eliminates the negative effect of the inhibitor on the stability of the hybrid sol-gel matrix. TiO2/inhibitor/sol-gel systems show enhanced corrosion protection and self-healing ability confirmed by EIS and SVET measurements. (C) 2006 Published by Elsevier B.V.