Abstract In the present work, PCL/ZnO (polycaprolactone/ zinc oxide), PCL/NiO (polycarprolactone/nickel oxide), PCL/CuO (polycarprolactone/copper oxide), and PCL/ZnO-NiO-CuO (polycarprolactone/ zinc oxide- nickel oxide- copper oxide) have been successfully fabricated and deposited on a mild steel through electrospinning technique. SEM, EDX, and FT-IR had been used to characterize all nanofiber coatings on the mild steel. A nanofiber layer of ZnO/NiO/CuO/PCL was utilized to coating the mild steel as a corrosion protector film in 1M HCl. A series of electrochemical techniques like Open circuit potential (OCP), Electrochemical impedance spectroscopy (EIS), linear polarization resistance (LPR), and potentiodynamic polarization (PDP) were used to analyse the anti-corrosion performance of the nanofiber layer ZnO/NiO/CuO/PCL. The results showed that both anodic and cathodic reactions sharp decline with shift in corrosion potential toward a positive direction in the Tafel plots. LPR results showed that the highest protection efficiency was 94.8% with ZnO-NiO-CuO/PCL nanofiber coating. EIS spectra showed that mild steel coated with ZnO/PCL, NiO/PCL, CuO/PCL, and ZnO-NiO-CuO/PCL, realization of capacitive conduct at high frequency and coating strength at law frequency part with resistor component 474.76 ohm.cm2, 527.35 ohm.cm2, 714.73 ohm.cm2, 744.80 ohm.cm2 respectively, indicating the good barrier properties and high ohmic resistance of coatings. SEM displayed a straight, interconnected structure, relatively less porosity with uniform fibers diameter. The fibers had average diameter 429 nm, 525 nm, 639 nm, and 443 nm for ZnO/PCL, NiO/PCL, CuO/PCL, and ZnO-NiO-CuO/PCL respectively. EDX and FT-IR results confirmed the existence of ZnO, NiO, and CuO and approved the distribution into PCL matrix. . Results of the present study confirmed that ZnO-NiO-CuO/PCL electrospinning nanfiber coating could be considered as a new metallic oxide nanocomposite coating for a mild steel with excellent corrosion resistance.

中文翻译：

---

电纺纳米纤维ZnO-NiO-CuO/聚己内酯包覆低碳钢在酸性溶液中的腐蚀性能

摘要 在目前的工作中，PCL/ZnO（聚己内酯/氧化锌）、PCL/NiO（聚己内酯/氧化镍）、PCL/CuO（聚己内酯/氧化铜）和 PCL/ZnO-NiO-CuO（聚己内酯/氧化锌-氧化镍-氧化铜）已通过静电纺丝技术成功制造并沉积在低碳钢上。SEM、EDX 和 FT-IR 已用于表征低碳钢上的所有纳米纤维涂层。ZnO/NiO/CuO/PCL 的纳米纤维层用于涂覆低碳钢作为 1M HCl 中的腐蚀保护膜。采用开路电位（OCP）、电化学阻抗谱（EIS）、线性极化电阻（LPR）和动电位极化（PDP）等一系列电化学技术分析纳米纤维层ZnO/NiO/氧化铜/PCL。结果表明，在 Tafel 图中，随着腐蚀电位向正方向移动，阳极和阴极反应都急剧下降。LPR 结果表明，ZnO-NiO-CuO/PCL 纳米纤维涂层的最高保护效率为 94.8%。EIS谱表明低碳钢镀有ZnO/PCL、NiO/PCL、CuO/PCL和ZnO-NiO-CuO/PCL，实现了高频电容导通和法频部分镀层强度474.76 ohm.cm2电阻元件, 527.35 ohm.cm2, 714.73 ohm.cm2, 744.80 ohm.cm2, 说明涂层具有良好的阻隔性能和高欧姆电阻。SEM 显示出直的、相互连接的结构、相对较少的孔隙率和均匀的纤维直径。对于 ZnO/PCL、NiO/PCL、CuO/PCL，纤维的平均直径为 429 nm、525 nm、639 nm 和 443 nm，和 ZnO-NiO-CuO/PCL。EDX 和 FT-IR 结果证实了 ZnO、NiO 和 CuO 的存在，并批准其分布到 PCL 基质中。. 本研究的结果证实，ZnO-NiO-CuO/PCL 静电纺丝纳米纤维涂层可被认为是一种新型金属氧化物纳米复合涂层，可用于低碳钢，具有优异的耐腐蚀性能。