The influence of organophosphonic acid and conducting polymer on the adhesion and protection of epoxy coating on aluminium alloy
The influence of organophosphonic acid and conducting polymer on the adhesion and protection of epoxy coating on aluminium alloy
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DOI：
10.1016/j.porgcoat.2015.07.004
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发表时间：
2015-11-01
影响因子：
6.6
通讯作者：
Armelin, Elaine
中科院分区：
文献类型：
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作者：
Dalmoro, Viviane;Aleman, Carlos;Armelin, Elaine
本研究比较了改性硅烷纳米涂层和导电聚合物添加剂的掺入对铝表面环氧涂层的粘附和保护的有利影响。结果表明，硅烷涂层经适当的膦基修饰后，对金属基体具有良好的附着力，同时与环氧外层具有良好的附着力，从而提高了材料的耐腐蚀性。加入1%的聚（3-甲基噻吩乙酸酯）（P3TMA）也提高了环氧涂料与铝表面的附着力。在3.5% NaCl溶液中，随着浸泡时间的延长，附着力逐渐降低。综上所述，两种双层体系[乙烯基三甲氧基硅烷(VTMS)/四乙基硅酸盐（TEOS）和VTMS/TEOS/乙二胺四（亚甲基膦酸）（EDTPO）]以及在环氧涂层中使用P3TMA]在加速腐蚀试验中表现出更好的效果，即与直接粘附在铝表面的单层涂层相比，观察到极低的起泡形成。(C) 2015 Elsevier B.V.版权所有
In the present study we compared the beneficial effect on the incorporation of modified silane nanocoating and conducting polymer additive to the adhesion and protection of aluminium surface with epoxy coating. Results proved that the protection imparted by the silane coating, suitably modified with phosphonic groups, showed an excellent adhesion to the metallic substrate as well as good adherence with the epoxy outer layer, which result in an improved corrosion resistance. The incorporation of 1% of poly(3-methyl thiophene acetate) (P3TMA) also improved the adhesion force of the epoxy paint adhered to the aluminium surface. However, the adhesion force decreased with the increase of the immersion time in NaCl 3.5% solution. In conclusion, both bilayer systems [vinyltrimethoxysilane (VTMS)/tetraethylorthosilicate (TEOS) and VTMS/TEOS/ethylenediaminetetra(methylene phosphonic acid) (EDTPO)] and also the employment of P3TMA in the epoxy coating showed better results in accelerated corrosion assays, i.e. very low blistering formation was observed, compared with control samples based in a monolayer coating directly adhered to the aluminium surface. (C) 2015 Elsevier B.V. All rights reserved.