Self-Healing Coatings Based on Halloysite Clay Polymer Composites for Protection of Copper Alloys
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- 作者：Elshad Abdullayev ; Vagif Abbasov ; Asel Tursunbayeva ; Vasiliy Portnov ; Hikmat Ibrahimov ; Gulbaniz Mukhtarova ; Yuri Lvov
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2013
- 出版时间：May 22, 2013
- 年：2013
- 卷：5
- 期：10
- 页码：4464-4471
- 全文大小：558K
- 年卷期：v.5,no.10(May 22, 2013)
- ISSN：1944-8252
文摘
Halloysite clay nanotubes loaded with corrosion inhibitors benzotriazole (BTA), 2-mercaptobenzimidazole (MBI), and 2-mercaptobenzothiazole (MBT) were used as additives in self-healing composite paint coating of copper. These inhibitors form protective films on the metal surface and mitigate corrosion. Mechanisms involved in the film formation have been studied with optical and electron microscopy, UV鈥搗is spectrometry, and adhesivity tests. Efficiency of the halloysite lumen loading ascended in the order of BTA < MBT < MBI; consequently, MBI and MBT halloysite formulations have shown the best protection. Inhibitors were kept in the tubes buried in polymeric paint layer for a long time and release was enhanced in the coating defects exposed to humid media with 20鈥?0 h, sufficient for formation of protective layer. Anticorrosive performance of the halloysite-based composite acrylic and polyurethane coatings have been demonstrated for 110-copper alloy strips exposed to 0.5 M aqueous NaCl for 6 months.