Abstract

The aim of the present work was to evaluate the inhibition effect of cinnamon essential oil (CEO) on mild steel corrosion in 1.0 M HCl. Its antioxidant activity was also analyzed. The CEO characteristics were studied using a chromatography-flame ionization detector, gas chromatography-mass spectrometry analysis, potentiodynamic polarization, electrochemical impedance spectroscopy, and scanning electron microscopy coupled with energy dispersive X-ray spectroscopy, and weight loss measurements, the results achieved via different techniques were in excellent agreement. The inhibition efficiency of CEO exceeded 92% at 1.0 g/L at 298 K and increased with increasing the oil concentration but decreased slightly with an increase of temperature. The adsorption of the inhibitor on the surface of mild steel followed best the Langmuir isotherm model. The scanning electron microscopy and energy dispersive X-ray spectroscopy data confirmed the formation of a protective film on the surface of the mild steel.

中文翻译：

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肉桂精油在 1.0 M 盐酸溶液中作为低碳钢的环保缓蚀剂的价值

摘要

本工作的目的是评估肉桂精油 (CEO) 在 1.0 M HCl 中对低碳钢腐蚀的抑制作用。还分析了其抗氧化活性。使用色谱-火焰电离检测器、气相色谱-质谱分析、动电位极化、电化学阻抗谱、扫描电子显微镜结合能量色散X射线光谱和失重测量对CEO特征进行了研究，结果通过不同的方法获得。技术非常一致。CEO 的抑制效率在 1.0 g/L 时在 298 K 时超过 92%，并且随着油浓度的增加而增加，但随着温度的增加而略有下降。缓蚀剂在低碳钢表面的吸附符合朗缪尔等温线模型。