Inhibitor effect of N,N′-methylenediacrylamide on corrosion behavior of mild steel in 0.5 M HCl

被引：145

作者：

Avci, Guelsen ^{[1
]}

机构：

[1] Mersin Univ, Fac Educ, Sch Math & Sci Educ 2, Mersin, Turkey

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2008年 / 112卷 / 01期

关键词：

metals; electrochemical techniques; adsorption; corrosion;

D O I：

10.1016/j.matchemphys.2008.05.036

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

N,N',-Methylenediacrylamide has been evaluated as a corrosion inhibitor for mild steel electrodes in 0.5 M HCl solution using potentiodynamic polarization, electrochemical impedance spectroscopy, and polarization resistance measurements. According to the experimental results, inhibition efficiency increased with increasing inhibitor concentration. Potentiodynamic measurements showed that the presence of inhibitor molecules decreases cathodic and anodic currents and shifts corrosion potential to a more positive potential region. Adsorption of the inhibitor molecules to the mild steel surface obeyed the Langmuir adsorption isotherm. Adsorption free energy was calculated from the adsorption isotherm as -26.8 kJ mol(-1). The negative value of Delta G(ads), showed that the adsorption process is spontaneous for the studied conditions. In addition, measurements were carried out at different solution temperatures to determine temperature dependence of the adsorption process. At all studied temperatures, the inhibitor molecule protected mild steel electrodes with the same effect. The effect of immersion time on corrosion of mild steel was also tested in this study. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：234 / 238

页数：5

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