As an important anti-corrosion method, corrosion inhibitors have attracted extensive attention from researchers. In this study, ultrapure water was used as the solvent, and Abelmoschus esculentus leaf extract (AELE) was prepared using the decoction method, and its corrosion inhibition properties were deeply explored using theoretical and experimental methods. Quantum chemical calculation results show that the four components in Abelmoschus esculentus leaf extract manifest notable corrosion inhibition characteristics. The components demonstrate high binding energy upon adsorption on the Cu (111) surface, demonstrating their effective adhesion to the copper. Electrochemical measurement reveals the remarkable ability of AELE to successfully prevent copper corrosion. AELE demonstrates a corrosion inhibition efficiency of 96.2 % at 600 mg/L. Moreover, even with escalating temperatures, its corrosion inhibition efficacy remains consistently above 90 %. The result from the surface morphology examination indicate that the introduction of AELE into the HSO medium substantially diminishes the corrosion extent of the copper. The experimental findings reveal that the adsorption of AELE at the interface between copper and sulfuric acid conforms to the Langmuir adsorption isotherm. The application not only broadens the resource utilization of crop waste, but also brings an innovative and effective corrosion inhibitor to the field of environmentally friendly chemistry.

中文翻译：

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深入探讨农作物废弃物作为可降解铜在硫酸介质中的缓蚀剂的防腐性能


缓蚀剂作为一种重要的防腐方法，受到了研究者的广泛关注。本研究以超纯水为溶剂，采用煎煮法制备黄秋葵叶提取物（AELE），并利用理论和实验方法对其缓蚀性能进行了深入探讨。量子化学计算结果表明，黄秋葵叶提取物中的四种成分表现出显着的缓蚀特性。这些成分在 Cu (111) 表面吸附时表现出高结合能，证明它们对铜的有效粘附。电化学测量揭示了 AELE 成功防止铜腐蚀的卓越能力。 AELE 在 600 mg/L 浓度下的缓蚀效率为 96.2%。此外，即使温度不断升高，其缓蚀效果仍始终保持在 90% 以上。表面形貌检查结果表明，将 AELE 引入 HSO 介质中大大降低了铜的腐蚀程度。实验结果表明AELE在铜和硫酸界面上的吸附符合Langmuir吸附等温线。该应用不仅拓宽了农作物废弃物的资源化利用，也为环保化学领域带来了一种创新有效的缓蚀剂。