期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2017
卷号：8
期号：10
页码：3529-3549
出版社：University of Mohammed Premier Oujda
摘要：Two newly substituted quinoline derivatives, namely 5-((2-(4-dimethylamino)-phenyl-1H-benzo[d]imidazol-1-yl)-methyl)-quinolin-8-ol (Q-N(CH3)2) and 5-((2-(4-nitrophenyl)-1H-benzo[d]imidazol-1-yl)-methyl)-quinolin-8-ol (Q-NO2) were synthesized and characterized by 1H and 13C NMR spectroscopy. Their inhibitory performance was studied against the corrosion of carbon steel in 1 M hydrochloric acid at 298 K. Data obtained from EIS measurements has been examined and characterized by weight loss, Tafel polarization and electrochemical impedance spectroscopy (EIS). The experimental results reveal that the studied compounds have good inhibiting effects on the corrosion for carbon steel in 1 M HCl medium. The protection efficiency increases with increasing inhibitor concentration but decrease with temperature. Polarization studies analyzed to model the corrosion inhibition process through appropriate equivalent circuit model; a constant phase element (CPE) has been used. The both inhibitors were found to obey Langmuir adsorption isotherm and Kinetic-Thermodynamic Model of El-Awady. Potentiodynamic polarization studies have shown that substituted quinolines acts as a mixed type of inhibitor’s.
