期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2016
卷号：7
期号：6
页码：2191-2200
出版社：University of Mohammed Premier Oujda
摘要：The inhibition of carbon steel in 1M HCl by synthesised 3 -methyl-1,2,4-triazole-5-thione (MTS) and its derivative surfactant type 1.12-bis(3-méthyl-5(1,12-triazolyl)thiol)dodecane (DTC12) has been studied by electrochemical polarization and electrochemical impedance spectroscopy (EIS). The results obtained reveal that these compounds are efficient inhibitors. The inhibition efficiency increases with the increase of inhibitors concentrations and reached 95% at 10 .3 M for DTC12. Potentiodynamic polarization studies clearly reveal that the presence of compounds studied does not change the mechanism of hydrogen evolution and that they act as mixed type inhibitors. This result was confirmed by the electrochemical impedance spectroscopy measurements. In addition, the impedance diagrams were co mposed of two capacitive loops. The first loop was attributed to the formation of a protective layer while the second was attributed to the charge transfer resistance. The DTC12 compound was selected as the best inhibitor. A theoretical study of the corrosion inhibition efficiency of the tested compounds, was carried out using density functional theory (DFT) at the B3LYP/6-31G (d) level of theory. Molecular properties were found to be in good agreement with the inhibition efficiency obtained from electrochemical techniques
