期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2010
卷号：1
期号：1
页码：9-19
出版社：University of Mohammed Premier Oujda
摘要：Inhibition effect of a new pyrimidine heterocyclic derivative, namely 2-hydrazino-4-(p-methoxyphenyl)-6-oxo-1,6-dihydrop yrimidine-5-carbonitrile (HPD) on copper corrosion in 3.5% NaCl solutions at 25°C ±1 was investigated by using potentiodynamic polarization , electrochemical impedance spectroscopy, EIS and electrochemical frequency modulatio n, EFM. The electrochemical measurements demonstrated that, under the chosen experimental conditions HPD offers sufficient inhibition against copper corrosion in 3.5% NaCl solutions. Tafel polarization studies have sho wn that the HPD suppresses both the cathodic and anodic processes and thus it acts as mixed-type inhibitor. The results of EIS indicate that the value of CPEs tends to decrease and both charge transfer resistance and inhibition efficiency tend to increase by increasing the inhibitor concentration. EFM can be used as a rapid and non destructive technique for corrosion rate measurements without prior knowledge of Tafel constants. Molecular d ynamic simulations are performed to investigate the adsorption behaviour of HPD on copper surface
