期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2014
卷号：3
期号：5
页码：12965
出版社：S&S Publications
摘要：The effect of some prepared compounds, namely 4,6-dimethyl pyrimidine derivatives (P-Cl), (P-NMe2) and(P-OH) on the corrosion of C-steel in 1 M HCl solutions has been studied using the weight loss, potentiodynamicpolarization, electrochemical frequency modulation (EFM) and electrochemical impedance spectroscopy (EIS)techniques. The results showed that the inhibition efficiency of the investigated compounds was found to depend on theconcentration and the nature of the inhibitor. The efficiency of the inhibitors increases with the increase in the inhibitorconcentration but decreases with a rise in temperature. Polarization results indicated that these compounds behave asmixed type inhibitors. The adsorption of these compounds on steel surface followed Langmuir adsorption isotherm.The reactivity of investigated compounds was analysed through quantum chemical by PM3 method to explain theefficiency of these inhibitors as corrosion inhibitors. The scanning electron microscope (SEM) results showed the formation ofa protective film on the metal surface in the presence of these additives.
关键词：Pyrimidine derivatives; C-steel; acid corrosion; PM3; SEM.
