香蕉叶提取物对铜合金在酸性介质中的缓蚀性能研究

Study on Corrosion Inhibition of Banana Leaf Extract on Copper Alloy in Acidic Medium

摘要: 以纯水为溶剂，采用煎煮法制备香蕉叶提取物。文章分别采用了电化学分析、表面形貌测试、量子化学计算和分子动力学模拟等方法探究了香蕉叶提取物对铜在酸溶液中的缓蚀性能。电化学测试结果表明当香蕉叶提取物浓度达到400 mg/L时，其缓蚀性能能够达到92%以上。极化曲线表明香蕉叶提取物吸附在铜电极表面时，能够同时抑制铜电极阴极和阳极的反应，属于混合型缓蚀剂。吸附等温模型研究表明香蕉叶提取物在铜表面的吸附符合朗缪尔单层吸附模型，并且同时存在物理和化学吸附。量子化学计算和分子动力学模拟均能表明香蕉叶提取物能够展现出高的缓蚀性能。

Abstract: Banana leaf extract was prepared by decoction method using pure water as solvent. Electrochemical analysis, surface morphology test, quantum chemical calculation and molecular dynamics simulation were used to investigate the corrosion inhibition performance of banana leaf extract on copper in acid solution. The electrochemical test results showed that when the concentration of banana leaf extract reached 400 mg/L, its corrosion inhibition performance could reach more than 92%. The polarization curve showed that when banana leaf extract was adsorbed on the surface of copper electrode, it could simultaneously inhibit the reaction of cathode and anode of copper electrode, and it was a mixed corrosion inhibitor. The adsorption isotherm model study showed that the adsorption of banana leaf extract on copper surface conformed to the Langmuir monolayer adsorption model, and physical and chemical adsorption existed at the same time. Both quantum chemical calculation and molecular dynamics simulation showed that banana leaf extract could exhibit high corrosion inhibition performance.