Abstract Polyaniline-carboxylic multiwalled carbon nanotubes (PANI-CMWCNTs) nanocomposites was prepared by a facile in-situ polymerization. PANI-CMWCNTs nanocomposites were incorporated into polyvinyl butyral (PVB) to prepare a protective coating on AA2024 aluminum substrates using a spin coating method. Besides, Poly (methylhydrosiloxane) (PMHS) was added to increase the crosslinking of the coating and form a hydrophobic surface. Scanning electron microscope, transmission electron microscope, UV–visible spectroscopy and Fourier transform infrared spectrum were used to characterize the morphologies and structures of different composites. The corrosion protection properties were investigated by electrochemical impedance spectroscopy and Tafel polarization in 3.5 wt% NaCl solution. Results showed that the PVB/PANI-CMWCNTs/PMHS composite coating exhibited remarkably enhanced anticorrosion properties, the corrosion current density (Icorr) of the coating decreased to 0.039 μA•cm−2, and the impedance value (|Z|0.01Hz) of the coating significantly improved compared with bare aluminum and exceeded 107 Ω•cm2, and the long-term corrosion resistance of the coating could last for over 60 days. The anticorrosive efficiency of PVB coating was promoted and an idea for the preparation of environmentally friendly coatings was proposed.

中文翻译：

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聚苯胺-多壁碳纳米管/聚（甲基氢硅氧烷）改善聚乙烯醇缩丁醛复合涂层的防腐性能

摘要 聚苯胺-羧酸多壁碳纳米管（PANI-CMWCNTs）纳米复合材料是通过简单的原位聚合制备的。将 PANI-CMWCNTs 纳米复合材料掺入聚乙烯醇缩丁醛 (PVB) 中，使用旋涂方法在 AA2024 铝基材上制备保护涂层。此外，添加聚（甲基氢硅氧烷）（PMHS）以增加涂层的交联并形成疏水表面。扫描电子显微镜、透射电子显微镜、紫外-可见光谱和傅里叶变换红外光谱被用来表征不同复合材料的形貌和结构。通过电化学阻抗谱和 Tafel 极化在 3.5 wt% NaCl 溶液中研究了腐蚀防护性能。结果表明，PVB/PANI-CMWCNTs/PMHS复合涂层表现出显着增强的防腐性能，涂层的腐蚀电流密度（Icorr）降低至0.039 μA•cm-2，阻抗值（|Z|0.01Hz）涂层与裸铝相比有明显改善，超过107Ω•cm2，涂层的长期耐腐蚀性能可持续60天以上。提高了PVB涂料的防腐效率，提出了制备环保涂料的思路。涂层的长期耐腐蚀性能可达60天以上。提高了PVB涂料的防腐效率，提出了制备环保涂料的思路。涂层的长期耐腐蚀性能可达60天以上。提高了PVB涂料的防腐效率，提出了制备环保涂料的思路。