This work is part of the development of new bio-sourced corrosion inhibitors from an abundant resource that can replace conventional synthetic inhibitors that are harmful to both human health and the environment. The corrosion inhibition performance of an aqueous extract of Artemisia herba-alba on the corrosion of 2024 aluminum alloy in a 1 M hydrochloric acid solution is investigated by weight loss method, electrochemical (linear polarization, potentiodynamic polarization, and electrochemical impedance spectroscopy) and SEM techniques. The extract shows excellent corrosion-inhibiting properties on aluminium alloy with a maximum inhibition efficiency of 93% at 0.6 g/L. The adsorption of the natural extract obeys the extended Langmuir isotherm equation adsorption model for multicomponent systems. Temperature studies show that the efficiency of the extract decreases with increasing temperature and that the corrosion activation energies increase in the presence of the extract. Liquid chromatography/high resolution mass spectrometry is used to identify the chemical constituents of the natural extract, and the most abundant phytochemicals for each subclass of metabolite are investigated using density functional theory (DFT) calculations. This study paves the way for further development of a plant that is particularly abundant in the desert regions of North Africa and has until now been used mainly for food for livestock and for pharmaceutical applications.

中文翻译：

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艾叶水提取物作为绿色抑制剂对 2024 铝合金酸活化的影响

这项工作是利用丰富的资源开发新型生物源腐蚀抑制剂的一部分，该抑制剂可以取代对人类健康和环境有害的传统合成抑制剂。采用失重法、电化学（线性极化、动电位极化、电化学阻抗谱）和SEM技术研究了白蒿水提取物对1 M盐酸溶液中2024铝合金的缓蚀性能。该提取物对铝合金表现出优异的缓蚀性能，在0.6 g/L时最大缓蚀效率为93%。天然提取物的吸附遵循多组分体系的扩展Langmuir等温方程吸附模型。温度研究表明，提取物的效率随着温度的升高而降低，并且提取物存在时腐蚀活化能增加。使用液相色谱/高分辨率质谱来鉴定天然提取物的化学成分，并使用密度泛函理论 (DFT) 计算研究每个代谢物亚类最丰富的植物化学物质。这项研究为进一步开发一种在北非沙漠地区特别丰富的植物铺平了道路，该植物迄今为止主要用于牲畜食品和制药应用。