Deyab M A, Mohsen Q
Egyptian Petroleum Research Institute (EPRI), Nasr City, Cairo, Egypt.
Department of Chemistry, College of Sciences, Taif University, Taif, Saudi Arabia.
Sci Rep. 2024 Dec 16;14(1):30505. doi: 10.1038/s41598-024-82263-4.
Examining Irish ivy extract's (IIE) potential as a novel corrosion inhibitor to preserve C-steel in 2.0 M HSO solution under dynamic conditions is the main goal of this work. Investigations on weight loss, surface morphology, thermodynamics, electrochemistry (polarization and impedance), and adsorption isotherms all contributed to the achievement of this goal. The results demonstrated that the IIE extract's inhibitory effectiveness increases with concentration, reaching a maximum of 94.2% at 0.5 g L. The approach that most nearly matched the experiment's results was the Langmuir adsorption isotherm. The activation energy rises to 61.4 kJ mol when IIE extract is added, compared to 46.9 kJ mol (2.0 M HSO). The mixed type behavior of the IIE extract was confirmed by electrochemical method. The IIE extract effectively adsorbed on the C-steel, as confirmed by the FT-IR and SEM examinations. Many compounds, including α-hederin, hederacoside C, hederacoside D, and chlorogenic acid, which may operate as the main agents of corrosion control, were found by HPLC analysis of the IIE extract.
研究爱尔兰常春藤提取物（IIE）作为一种新型缓蚀剂在动态条件下保护2.0 M硫酸溶液中碳钢的潜力是这项工作的主要目标。对失重、表面形态、热力学、电化学（极化和阻抗）以及吸附等温线的研究都有助于实现这一目标。结果表明，IIE提取物的缓蚀效果随浓度增加而提高，在0.5 g/L时达到最大值94.2%。最接近实验结果的方法是朗缪尔吸附等温线。添加IIE提取物时，活化能升至61.4 kJ/mol，而在2.0 M硫酸中为46.9 kJ/mol。电化学方法证实了IIE提取物的混合型行为。傅里叶变换红外光谱（FT-IR）和扫描电子显微镜（SEM）检查证实，IIE提取物有效地吸附在碳钢上。通过对IIE提取物的高效液相色谱（HPLC）分析发现了许多化合物，包括α-常春藤皂苷、常春藤皂苷C、常春藤皂苷D和绿原酸，它们可能是腐蚀控制的主要因素。
