Adsorption and corrosion inhibitive properties of 2-Mercaptobenzothiazole on AISI steel 4130 alloy in hydrochloric acid solution

被引：4
作者：
Hoseizadeh, A. R. [1 ]
Danaee, I. [1 ]
Maddahy, M. H. [1 ]
机构：
[1] Petr Univ Technol, Abadan Fac Petr Engn, Abadan, Iran
来源：
KOVOVE MATERIALY-METALLIC MATERIALS | 2014年 / 52卷 / 01期
关键词：
steel; 4130; corrosion; inhibitor; adsorption isotherm; Langmuir; MILD-STEEL; CARBON-STEEL; THERMODYNAMIC CHARACTERIZATION; THIAZOLE DERIVATIVES; METAL DISSOLUTION; BEHAVIOR;
D O I：
10.4149/km_2014_1_35
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The inhibition ability of 2-Mercaptobenzothiazole (MBT) against the corrosion of AISI steel 4130 in 1 M HCl solution was evaluated by polarization, electrochemical impedance spectroscopy (EIS) and chronoamperometry. Polarization studies indicated that MBT retarded both the cathodic and anodic reactions through chemical adsorption and blocking the active corrosion sites. The adsorption of this compound obeyed the Langmuir adsorption isotherm. The inhibition efficiency was increased with inhibitor concentration as well as temperature. EIS data was analyzed for an equivalent circuit model and showed that as the inhibitor concentration increased the charge transfer resistance of steel increased whilst double layer capacitance decreased. Kinetic and thermodynamic parameters such as activation energy, enthalpy, entropy and free energy of activation and adsorption were calculated. Atomic force microscopy (AFM) and optical microscope were used to study the steel surface with and without inhibitor.
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页码：35 / 45
页数：11
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