Effect of the incorporation of montmorillonite-layered double hydroxide nanoclays on the corrosion protection of epoxy coatings
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- 作者：Yuhua Dong ; Liqin Ma ; Qiong Zhou
- 关键词：Layered double hydroxide ; Montmorillonite ; Nanocomposite ; Ionic selectivity
- 刊名：Journal of Coatings Technology and Research
- 出版年：2013
- 出版时间：November 2013
- 年：2013
- 卷：10
- 期：6
- 页码：909-921
- 全文大小：1448KB
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Liqin Ma (1)
Qiong Zhou (1)
1. College of Science, China University of Petroleum (Beijing), Beijing, 102249, China - ISSN：1935-3804
文摘
A series of layered double hydroxide (LDH)/montmorillonite (MMT) nanocomposite coating, LDH nanocomposite coating, and MMT nanocomposite coating were successfully prepared. The nanocomposite materials were characterized by X-ray diffraction and scanning electron microscopy (SEM). To understand the effect of MMT and LDH on the corrosion inhibition performance of epoxy resin coatings immersed in 3.5?wt% saline solution at 90°C, electrochemical impedance spectroscopy and an autoclave test were performed on epoxy resin; epoxy resin blended with LDH, MMT, and LDH?+?MMT (LM) coatings painted on Q345 steel. The metal/coating interfaces were observed by SEM and energy-dispersive spectroscopy. Results showed that addition of LDH and MMT improved the protection properties of the epoxy resin coatings. The corrosion protection of the LM nanocomposite coating was superior to that of the other coatings. This finding can be attributed to the ionic selectivity and barrier effect of MMT and LDH nanoclay platelets dispersed within the composite coatings.