Investigation of the effect of disulfiram on corrosion of mild steel in hydrochloric acid solution

► Adsorption of disulfiram followed El-Awady’s kinetic-thermodynamic model. ► Constant phase elements are introduced to explain the impedance data. ► Occurrence of inductive loop is dealt with the introduction of an inductive element L. ► The inhibition efficiency of DSR decreased with temperature....

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Veröffentlicht in:Corrosion science 2011-04, Vol.53 (4), p.1288-1297
Hauptverfasser: Singh, Ashish Kumar, Quraishi, M.A.
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description ► Adsorption of disulfiram followed El-Awady’s kinetic-thermodynamic model. ► Constant phase elements are introduced to explain the impedance data. ► Occurrence of inductive loop is dealt with the introduction of an inductive element L. ► The inhibition efficiency of DSR decreased with temperature. The corrosion inhibition properties of disulfiram (DSR) for mild steel in HCl solution were analyzed by electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, atomic force microscopy, scanning electron microscopy and gravimetric methods. Physical adsorption is proposed for the inhibition and the process followed the Langmuir adsorption isotherm and kinetic/thermodynamic model of El-Awady et al. Constant phase elements describing the non-ideal characteristics of the electrochemical interface are introduced. The occurrence of inductive loop is also dealt with, through the introduction of an inductive element L. The use of these elements significantly improved the quality of fit of simulation to the EIS data.
doi_str_mv 10.1016/j.corsci.2011.01.002
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The corrosion inhibition properties of disulfiram (DSR) for mild steel in HCl solution were analyzed by electrochemical impedance spectroscopy (EIS), potentiodynamic polarization, atomic force microscopy, scanning electron microscopy and gravimetric methods. Physical adsorption is proposed for the inhibition and the process followed the Langmuir adsorption isotherm and kinetic/thermodynamic model of El-Awady et al. Constant phase elements describing the non-ideal characteristics of the electrochemical interface are introduced. The occurrence of inductive loop is also dealt with, through the introduction of an inductive element L. 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subjects A. Mild steel
Adsorption
Applied sciences
B. AFM
B. EIS
B. SEM
C. Kinetic parameters
Carbon steels
Corrosion
Corrosion environments
Corrosion inhibitors
Electrochemical impedance spectroscopy
Exact sciences and technology
Hydrochloric acid
Inhibition
Isotherms
Mathematical models
Metals. Metallurgy
title Investigation of the effect of disulfiram on corrosion of mild steel in hydrochloric acid solution
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