咪唑啉衍生物缓蚀剂对碳钢在CO_2盐水中的缓蚀机理(英文)

Inhibition Mechanism of Imidazoline Derivative Inhibitor for Q235 Steel in Saltwater Saturated with CO_2

采用极化曲线和交流阻抗研究新合成咪唑啉衍生物缓蚀剂对碳钢在饱和CO2盐水中的缓蚀性能和机理.计算了缓蚀效率和热力学参数.缓蚀效率随着缓蚀剂浓度增大而增加,但随着温度增加先增加后降低.咪唑啉衍生物在碳钢表面的吸附符合Langmuir等温式.电化学结论由量子化学计算补充说明.

Laboratory investigations （polarization and electrochemical impedance spectroscopy） were performed in order to assess the effectiveness and the inhibition mechanism of new synthesized imidazoline derivative inhibitor to prevent corrosion of steel in saltwater saturated with carbon dioxide. The inhibitor efficiencies and thermodynamic parameters were calculated. The inhibition efficiency increased with the increase in inhibitor concentration, but increased then decreased with temperature, It was seen that the adsorption of imidazoline derivative on steel fitted the Langmuir isotherm equation, The electrochemical results have also been supplemented by quantum chemical analysis.