El-Katori Emad E, Abousalem Ashraf S
Department of Chemistry, Faculty of Science, The New Valley University El-Kharja-72511 Egypt
Quality Control Laboratory, Operations Department Jotun-11835 Egypt.
RSC Adv. 2019 Jul 3;9(36):20760-20777. doi: 10.1039/c9ra03603b. eCollection 2019 Jul 1.
The inhibitive and adsorption activity of some pyrrolidinium ionic liquids (ILs) for the dissolution of copper in 1 M HNO solution was tested using chemical methods such as weight loss and electrochemical techniques; potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and electrical frequency modulation (EFM) techniques. The results indicated that the ionic liquids under investigation exhibited promising corrosion inhibitory performance in 1 M HNO and their efficiencies reached up to 85% at 0.05 mM. Also, an enhancement in the inhibition efficiency (% IE) accompanied the increase in inhibitor concentration. The polarization measurements suggested that these ionic liquid inhibitors act as mixed-type inhibitors. The adsorption of the ionic liquid inhibitors on the copper surface obey the Langmuir adsorption isotherm. Thermodynamic parameters were calculated and discussed. The surface morphology of the copper surface was examined using different techniques. Correlation between the calculated % IE from experiments and some quantum chemical parameters was established.
使用失重等化学方法以及电化学技术（动电位极化、电化学阻抗谱（EIS）和电频率调制（EFM）技术）测试了一些吡咯烷鎓离子液体（ILs）对铜在1 M HNO溶液中溶解的抑制和吸附活性。结果表明，所研究的离子液体在1 M HNO中表现出良好的缓蚀性能，在0.05 mM时其效率高达85%。此外，随着抑制剂浓度的增加，缓蚀效率（%IE）也有所提高。极化测量表明，这些离子液体抑制剂为混合型抑制剂。离子液体抑制剂在铜表面的吸附符合朗缪尔吸附等温线。计算并讨论了热力学参数。使用不同技术检查了铜表面的形貌。建立了实验计算的%IE与一些量子化学参数之间的相关性。
