Dynamics and corrosion resistance of amine-cured organically modified silicate coatings on aluminum alloys

被引：26
|
作者：
Wu, K. H. [1 ]
Chang, T. C.
Yang, C. C.
Wang, G. P.
机构：
[1] NDU Tahsi, Chung Cheng Inst Technol, Dept Appl Chem, Taoyuan 335, Taiwan
[2] Chung Shan Inst Sci & Technol, Chem Syst Res Div, Taoyuan 325, Taiwan
来源：
THIN SOLID FILMS | 2006年 / 513卷 / 1-2期
关键词：
alloys; coatings; corrosion; electrochemistry; nuclear magnetic resonance (NMR); amines;
D O I：
10.1016/j.tsf.2006.01.022
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Hybrid coatings based on amine-cured organically modified silicate were synthesized through a sol-gel technique. 3-glycidoxypropyl-trimethoxysilane tetraethylenepentamine, and tetraethoxysilane were used as precursors for the hybrid coatings. These Ormosil films were deposited via spin coating onto an aluminum alloy to improve the corrosion protection. The effects induced by the curing agent content of tetraethylenepentamine (TEPA) on the chain dynamics and corrosion performance of the coated samples were investigated. The Si-H polarization transfer relaxation times and the rotating-frame spin-lattice relaxation times indicated that the configuration of the Ormosil films was highly crosslinked and dense and adhered to the aluminum alloy substrates. Potentiodynamic evaluation revealed that the Ormosil films provided exceptional barrier and corrosion protection in comparison with untreated AA substrates. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：84 / 89
页数：6
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