用咖啡渣的水醇提取物对C38钢在1M盐酸中缓蚀的电化学和热力学研究

IF 1.5 Q4 ELECTROCHEMISTRY

International Journal of Corrosion Pub Date : 2020-01-24 DOI:10.1155/2020/4045802

F. Bouhlal, N. Labjar, F. Abdoun, Aimad Mazkour, M. Serghini-Idrissi, M. El Mahi, E. Lotfi, S. El hajjaji

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引用次数: 16

摘要

本工作研究了温度对C38钢在1M HCl介质中腐蚀的影响，该介质含有和不含有不同浓度的用过的咖啡渣的水醇提取物（HECG）。在293.15至323.15K的温度范围内进行了动电位极化技术和电化学阻抗谱。观察到，随着温度和抑制剂浓度的增加，抑制效率降低。HECG在C38钢表面的吸附过程是自发的，在所有研究温度下都符合Langmuir等温线。吸附的相关热力学参数表明HECG化合物在C38钢表面发生了物理吸附。

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Electrochemical and Thermodynamic Investigation on Corrosion Inhibition of C38 Steel in 1M Hydrochloric Acid Using the Hydro-Alcoholic Extract of Used Coffee Grounds

The present work investigates the influence of temperature on C38 steel corrosion in a 1 M HCl medium with and without different concentrations of a hydro-alcoholic extract of used coffee grounds (HECG). The potentiodynamic polarization technique and the electrochemical impedance spectroscopy were performed in temperatures ranging from 293.15 to 323.15 K. It was observed that the inhibition efficiency decreased with increased temperature and inhibitor concentration. The HECG adsorption process on C38 steel surface was found to be spontaneous and obeyed to Langmuir isotherm at all studied temperatures. The associated thermodynamic parameters of adsorption led to suggest the occurrence of physical adsorption of the HECG compounds on the C38 steel surface.

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来源期刊

International Journal of Corrosion ELECTROCHEMISTRY-

CiteScore

5.70

自引率

0.00%

发文量

审稿时长

14 weeks