Electrochemical and quantum chemical assessment of two organic compounds from pyridine derivatives as corrosion inhibitors for mild steel in HCl solution under stagnant condition and hydrodynamic flow

被引：255
作者：
Kosari, A. [1 ]
Moayed, M. H. [1 ]
Davoodi, A. [2 ]
Parvizi, R. [1 ]
Momeni, M. [1 ]
Eshghi, H. [3 ]
Moradi, H. [3 ]
机构：
[1] Ferdowsi Univ Mashhad, Mat & Met Engn Dept, Mashhad 917751111, Iran
[2] Hakim Sabzevari Univ, Dept Mat Engn, Sabzevar, Iran
[3] Ferdowsi Univ Mashhad, Dept Chem, Mashhad 917751111, Iran
来源：
CORROSION SCIENCE | 2014年 / 78卷
关键词：
Mild steel; EIS; Polarization; Acid inhibition; SCHIFF-BASE COMPOUNDS; CARBON-STEEL; HYDROCHLORIC SOLUTION; ACIDIC MEDIA; BEHAVIOR; IRON; ADSORPTION; FILM; BENZIMIDAZOLE; DISSOLUTION;
D O I：
10.1016/j.corsci.2013.09.009
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this study, the inhibitive performance of two pyridine derivatives as corrosion inhibitors for mild steel was examined under stagnant condition and hydrodynamic flow in HCl solution at 25 degrees C. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques were employed. To explore the inhibitors adsorption mechanism, Langmuir isotherm and quantum chemical studies were used. The results of electrochemical measurements show that the inhibitor concentration has a positive effect on its efficiency while for hydrodynamic condition, it is vice versa. Corrosion attack morphologies were observed at stagnant and hydrodynamic conditions to verify qualitatively the results obtained by electrochemical methods. (C) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：138 / 150
页数：13
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