Since corrosion with its direct and indirect negative effects is a global issue, coatings are commonly used as a structural corrosion protection strategy. The reinforcement effects of Poly (aniline-co-pyrrole) (PACP) nanospheres on corrosion resistance of solvent-based epoxy coatings are investigated in this study. The corrosion behavior of mild steel substrates coated with epoxy containing different weight percents (0.25, 0.5, 0.75, and 1.0 wt%) of PACP nanospheres is investigated using electrochemical impedance spectroscopy (EIS) in a 3.5 wt% NaCl solution, while the fracture cross-section is studied by field emission scanning electron microscopy (FE-SEM). The incorporation of the PACP nanospheres in the polymer coatings considerably improves the protective performance of the epoxy coatings. The results of the EIS test shows that the highest corrosion resistance is for the EP-PACP- 0.75 wt% sample. In the first day of immersion, |Z|_100kHz is equal to 5.2 × 10¹² Ω.cm², which is much more than the pure epoxy sample (10⁵ Ω.cm²). After two months of immersion, the resistance reduction for the optimum sample is negligible and the amount of water uptake into the coating is the lowest. These findings demonstrate that the epoxy/PACP nanocomposite is superior when compared to the pure epoxy coating.

由于腐蚀及其直接和间接负面影响是一个全球性问题，因此涂层通常用作结构腐蚀防护策略。本研究研究了聚苯胺吡咯（PACP）纳米球对溶剂型环氧涂料耐腐蚀性的增强作用。使用电化学阻抗谱 (EIS)研究了涂有含有不同重量百分比（0.25、0.5、0.75 和 1.0 wt%）PACP 纳米球的环氧树脂的低碳钢基材在 3.5 wt% NaCl 溶液中的腐蚀行为，同时断裂交叉-截面通过场发射扫描电子显微镜(FE-SEM)进行研究。在聚合物涂料中加入PACP纳米球可显着提高环氧涂料的防护性能。EIS 测试结果表明，EP-PACP-0.75 wt% 样品的耐腐蚀性能最高。在沉浸的第一天，|Z| _100kHz等于 5.2 × 10 ¹²  Ω.cm ² ，远高于纯环氧树脂样品（10 ⁵  Ω.cm ²）。浸泡两个月后，最佳样品的电阻降低可以忽略不计，并且涂层的吸水量最低。这些发现表明，与纯环氧涂层相比，环氧树脂/PACP 纳米复合材料更优越。