Corrosion inhibition of mild steel in 1?M H 2 SO 4 was investigated in absence and presence of Citrus aurantium leaves extracts as a friendly inhibitor. The effect of temperature, time, and inhibitor concentration were studied using weight loss technique. The result obtained revealed that Citrus aurantium leaves extracts act as an inhibitor for mild steel in H 2 SO 4 and reduces the corrosion rate. The inhibition efficiency was found to increases with increase in inhibitor concentration whereas the temperature shows otherwise. Higher inhibition efficiency was 89% at 40?°C and 10?ml/l inhibitor concentration. The adsorption of Citrus aurantium leaves extracts was found to follow Langmuir adsorption isotherm model. The values of the free energy of adsorption was around ?20?kJ/mol, which is indicative of physical adsorption between charged molecules and a charged metal. Quantum chemical calculations were also used as a theoretical support to the experimental results. Finally the scanning electron microscope and Fourier transform infrared spectroscopy were evaluated to examine surface morphology and molecular structure of inhibitor respectively. Highlights ? Friendly inhibitor was extracted. ? Corrosion inhibition is studied theoretically. ? Surface studies were carried out. ? FTIR analysis was done.
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机译：在不存在和存在柑桔叶提取物作为友好抑制剂的情况下，研究了在1？M H 2 SO 4中低碳钢的腐蚀抑制作用。使用减肥技术研究了温度，时间和抑制剂浓度的影响。所获得的结果表明，柑桔叶提取物在H 2 SO 4中充当低碳钢的抑制剂并降低腐蚀速率。发现抑制效率随抑制剂浓度的增加而增加，而温度则相反。在40？C和10？ml / l抑制剂浓度下，较高的抑制效率为89％。发现柑桔叶提取物的吸附遵循Langmuir吸附等温线模型。吸附的自由能的值约为≤20≤kJ/ mol，这表明带电分子与带电金属之间的物理吸附。量子化学计算也被用作实验结果的理论依据。最后对扫描电子显微镜和傅里叶变换红外光谱进行了评估，以分别检查抑制剂的表面形态和分子结构。强调 ？提取了友好的抑制剂。 ？从理论上研究了缓蚀性能。 ？进行了表面研究。 ？ FTIR分析完成。
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