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首页> 外文期刊>Journal of Molecular Liquids >Natural nutmeg oil as a green corrosion inhibitor for carbon steel in 1.0 M HCl solution: Chemical, electrochemical, and computational methods
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Natural nutmeg oil as a green corrosion inhibitor for carbon steel in 1.0 M HCl solution: Chemical, electrochemical, and computational methods

机译：天然肉豆油作为碳钢的绿色腐蚀抑制剂1.0 m HCl溶液：化学，电化学和计算方法

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摘要

Nutmeg oil was verified as a safe and green inhibitor for the corrosion of carbon steel type L-52 (CSL-52) in 1.0 M HCl solution through chemical, electrochemical, and computational studies. The outcome of these measurements confirmed that nutmeg oil was an effective inhibitor. The percentage inhibition efficacy (%IE) increased with increasing nutmeg oil concentration and decreasing temperature, reaching 94.73% at 500 ppm nutmeg oil. Polarisation curves revealed that the nutmeg oil acted as a mixed inhibitor, which was explained by the adsorption of nutmeg oil onto the surface of the CS. The adsorption process follows the Langmuir isotherm. Electrochemical impedance spectroscopy studies showed a single capacitive loop, indicating that the corrosion reaction was controlled by a charge transfer process. In addition, the thermodynamic parameters of the kinetic activation and adsorption process were calculated and interpreted, with results showing that the nutmeg oil acted as a pitting corrosion inhibitor through noticeable variation in pitting potential in the noble directions. This study also aimed to predict the inhibitory potency of the four molecular constituents of nutmeg oil through computational work, for which effort DFT and MC simulations were performed for the four inhibitor molecules. (C) 2020 Elsevier B.V. All rights reserved.
机译：通过化学、电化学和计算研究，肉豆蔻油被证实是一种安全、绿色的缓蚀剂，用于L-52型碳钢（CSL-52）在1.0 M HCl溶液中的腐蚀。这些测量结果证实肉豆蔻油是一种有效的抑制剂。随着肉豆蔻油浓度的增加和温度的降低，抑制率（%IE）增加，在500 ppm肉豆蔻油浓度下达到94.73%。极化曲线显示肉豆蔻油起到了混合抑制剂的作用，这可以通过肉豆蔻油在CS表面的吸附来解释。吸附过程遵循朗缪尔等温线。电化学阻抗谱研究表明，腐蚀反应是由电荷转移过程控制的。此外，对动力学活化和吸附过程的热力学参数进行了计算和解释，结果表明肉豆蔻油通过在贵方向上显著改变点蚀电位而起到了点蚀缓蚀剂的作用。本研究还旨在通过计算工作预测肉豆蔻油的四种分子成分的抑制效力，并对四种抑制剂分子进行DFT和MC模拟。（C） 2020爱思唯尔B.V.版权所有。

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