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首页> 外文期刊>Cogent Chemistry >Theoretical and experimental inhibitive properties of mild steel in HCl by ethanolic extract of Boscia senegalensis
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Theoretical and experimental inhibitive properties of mild steel in HCl by ethanolic extract of Boscia senegalensis

机译：塞内加尔Boscia乙醇提取物在HCl中对低碳钢的理论和实验抑制性能

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The experimental aspect of the corrosion inhibition potentials of Boscia senegalensis was carried out using gravimetric and linear polarization techniques as well as scanning electron microscopy and Fourier transform infrared spectroscopy (FTIR), whereas the theoretical aspect was studied using the density functional theory calculations to be performed and modeling the electronic structures of some extract constituents, including physiosorptive interactions with the Fe surface. The analyses of the experimental results showed that the inhibition efficiency increased with increase in concentration of the inhibitor and decreased with increase in temperature. The efficiency of the extract in HCl was 70%. Thermodynamic parameters revealed that the adsorption of extract onto the metal surface was spontaneous, exothermic, and supported the physical adsorption process. FTIR results showed that the inhibition mechanism was an absorption process through the functional groups present in the extract and that of the inhibited. Surface morphology also revealed that corrosion product confirmed the protection offered by the extract on the surface of the metal immersed in the acid media. The data obtained were fitted into various adsorption isotherms, though the Freundlich isotherm was found to be the best fit.
机译：使用重量和线性极化技术以及扫描电子显微镜和傅里叶变换红外光谱（FTIR）进行塞内加尔Boscia塞内加尔的腐蚀抑制潜力的实验方面，而使用密度泛函理论计算则从理论方面进行了研究。进行和模拟某些提取物成分的电子结构，包括与铁表面的物理吸附相互作用。对实验结果的分析表明，抑制效率随抑制剂浓度的增加而增加，随温度的升高而降低。萃取液在HCl中的效率为70％。热力学参数表明，萃取物在金属表面的吸附是自发的，放热的，并支持物理吸附过程。 FTIR结果表明，抑制机理是提取物中存在的官能团与被抑制物中的官能团的吸收过程。表面形态还表明，腐蚀产物证实浸没在酸性介质中的金属表面上的萃取物具有保护作用。尽管发现Freundlich等温线是最佳拟合，但将获得的数据拟合到各种吸附等温线中。

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