We report on the synthesis and characterization of carbon nanotube (CNT)-doped polyaniline (PANI) composites for enhanced corrosion protection of steel with improved electrical properties. PANI–CNT nanocomposites were prepared through in situ polymerization of aniline in the presence of CNTs. Synthesized nanocomposites were characterized by several analytical methods such as Fourier transform infrared spectroscopy, x-ray diffraction, micro-Raman spectroscopy, and scanning electron microscopy in order to understand the structural, morphological, and molecular aspects of the composites. The doping of CNTs in PANI matrix drastically enhanced the alternating current/direct current (AC/DC) conductivities as well as the dielectric attributes and impedance spectroscopy of the composites. The anticorrosion studies of the prepared composites were performed by using open-circuit potential analysis and potentiodynamic measurements. Compared to stainless steel, PANI–CNT nanocomposites demonstrated excellent anticorrosion behavior. The obtained results showed that 25 wt.% of CNT-doped PANI composite exhibits excellent anticorrosion properties due to electron transmission and passive catalysis.

中文翻译：

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低碳钢上聚苯胺-碳纳米管复合涂层的电荷传输和防腐性能增强

我们报告了碳纳米管（CNT）掺杂的聚苯胺（PANI）复合材料的合成和表征，以增强钢的电腐蚀保护性能。PANI–CNT纳米复合材料是通过在CNTs存在下通过苯胺的原位聚合制备的。合成的纳米复合材料通过几种分析方法进行表征，例如傅立叶变换红外光谱，X射线衍射，显微拉曼光谱和扫描电子显微镜，以了解复合材料的结构，形态和分子方面。在PANI基质中掺杂CNT可以大大提高交流电/直流电（AC / DC）的电导率以及复合材料的介电特性和阻抗谱。通过使用开路电势分析和电位动力学测量对制备的复合材料进行防腐研究。与不锈钢相比，PANI-CNT纳米复合材料具有出色的防腐性能。所得结果表明，由于电子传输和被动催化，25重量％的CNT掺杂的PANI复合材料表现出优异的防腐蚀性能。