Sayed Ali G, Ashmawy Ashraf M, Elgammal Walid E, Hassan Saber M, Deyab M A
Chemistry Department, Faculty of Science (Boys), Al-Azhar University, Nasr City, Cairo, 11884, Egypt.
Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, Egypt.
Sci Rep. 2023 Aug 23;13(1):13761. doi: 10.1038/s41598-023-39714-1.
This study aims to synthesize and evaluate the corrosion inhibition properties of three newly prepared organic compounds based on benzo[h]quinoline hydrazone derivatives. The compounds structure were characterised using FTIR, 1H-NMR, 13C-NMR and Mass spectroscopy. Electrochemical methods, including Potentiodynamic Polarization (PP), Electrochemical Frequency Modulation (EFM), and Electrochemical Impedance Spectroscopy (EIS) were employed to evaluate the compounds as corrosion inhibitors in HCl (1.0 M) for carbon steel (CS). Additionally, surface examination techniques such as scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDX) were used to investigate the surface morphology and elemental composition of the CS before and after exposure to the synthesized compounds. The electrochemical measurements showed that compound VII achieved corrosion inhibition efficiency. SEM and EDX analysis further confirmed the creation of a passive film on the CS surface. These findings demonstrated the potential of benzo[h]quinoline hydrazone derivatives as effective organic corrosion inhibitors for CS in aggressive solution.
本研究旨在合成并评估三种新制备的基于苯并[h]喹啉腙衍生物的有机化合物的缓蚀性能。使用傅里叶变换红外光谱（FTIR）、核磁共振氢谱（1H-NMR）、核磁共振碳谱（13C-NMR）和质谱对化合物结构进行了表征。采用电化学方法，包括动电位极化（PP）、电化学频率调制（EFM）和电化学阻抗谱（EIS），来评估这些化合物在1.0 M盐酸中对碳钢（CS）的缓蚀性能。此外，还使用扫描电子显微镜（SEM）和能量色散X射线光谱（EDX）等表面检测技术，研究了碳钢在接触合成化合物前后的表面形态和元素组成。电化学测量结果表明，化合物VII具有缓蚀效率。SEM和EDX分析进一步证实了碳钢表面形成了钝化膜。这些发现表明苯并[h]喹啉腙衍生物在侵蚀性溶液中作为碳钢有效有机缓蚀剂的潜力。
