Polydimethylsiloxane Resin Nanocomposite Coating with Alternating Multilayer Structure for Corrosion Protection Performance

Jianping Liu, Jiaoxia Zhang, Jijun Tang, Liuyue Pu, Yanli Xue, Mei-juan Lu, Lei Xu, Zhanhu Guo
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引用次数: 51

Abstract

Polydimethylsiloxane (PDMS) composite coatings filled with nanoparticles have been used extensively as anticorrosion materials. The alternating multilayer polydimethylsiloxane resin nanocomposite coating was first fabricated based on stepwise coating method via adding graphene and α-alumina. Their mechanical and anticorrosion properties were discussed. The binary fillers greatly improved the adhesion up to level 1, at the same time, the coating remained extreme flexibility. When the graphene was 0.3 wt%, the alternating multilayer coating exhibited the best corrosion resistance with the 4.82 V of corrosion potential (Ecorr), which was increased by near 40 times compared with pure PDMS coating. Meanwhile, the impedance value of composite coating reached 10 Ω•cm. The corrosion current density (Icorr) of the coating was smaller than that of bare tinplate. The long-term soaking results prove that the alternating multilayer composite coating still possess the outstanding corrosion resistance for tinplate after 30-day immersion.
多层交变结构聚二甲基硅氧烷树脂纳米复合涂层的防腐性能研究
填充纳米粒子的聚二甲基硅氧烷(PDMS)复合涂层作为防腐材料得到了广泛的应用。以α-氧化铝和石墨烯为原料,采用分步包覆法制备了多层聚二甲基硅氧烷树脂纳米复合涂层。对其力学性能和防腐性能进行了讨论。二元填料大大提高了涂层的附着力,达到1级,同时涂层保持了极高的柔韧性。当石墨烯含量为0.3 wt%时,交变多层涂层的耐蚀性能最佳,腐蚀电位(Ecorr)为4.82 V,比纯PDMS涂层提高了近40倍。同时,复合涂层的阻抗值达到10 Ω•cm。涂层的腐蚀电流密度(Icorr)小于裸马口铁。长期浸渍试验结果表明,交替多层复合涂层在浸渍30天后仍具有优异的耐马口铁腐蚀性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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