Inhibition effect of hexadecyl pyridinium bromide on the corrosion behavior of some austenitic stainless steels in H2SO4 solutions
Ibrahim, Magdy; M.M. Hamza; S.S. Abd El Rehim;
Abstract
The inhibition effect of hexadecyl pyridinium bromide (HDPB) as a cationic surfactant
on the corrosion behavior of some Egyptian austenitic stainless steel SS 304L, SS 316H and SS
304H in 0.5 M H2SO4 solutions was investigated by using potentiodynamic polarization technique and electrochemical impedance spectroscopy (EIS). The results indicate that HDPB is a good inhibitor for the samples under investigation in 0.5 M H2SO4 solutions. In addition, the inhibition efficiency g% increases with the inhibitor concentration while decreases with the increasing temperature referring to physical adsorption. The adsorption of the inhibitor obeys a Temkin adsorption isotherm. Polarization curves show that HDPB is a mixed inhibitor in H2SO4 solutions. The results obtained from polarization and impedance measurements are in good agreement. Activation-free energies, enthalpies, and entropies for the inhibition process of HDPB were determined.
on the corrosion behavior of some Egyptian austenitic stainless steel SS 304L, SS 316H and SS
304H in 0.5 M H2SO4 solutions was investigated by using potentiodynamic polarization technique and electrochemical impedance spectroscopy (EIS). The results indicate that HDPB is a good inhibitor for the samples under investigation in 0.5 M H2SO4 solutions. In addition, the inhibition efficiency g% increases with the inhibitor concentration while decreases with the increasing temperature referring to physical adsorption. The adsorption of the inhibitor obeys a Temkin adsorption isotherm. Polarization curves show that HDPB is a mixed inhibitor in H2SO4 solutions. The results obtained from polarization and impedance measurements are in good agreement. Activation-free energies, enthalpies, and entropies for the inhibition process of HDPB were determined.
Other data
Title | Inhibition effect of hexadecyl pyridinium bromide on the corrosion behavior of some austenitic stainless steels in H2SO4 solutions | Authors | Ibrahim, Magdy ; M.M. Hamza ; S.S. Abd El Rehim | Keywords | Hexadecyl pyridinium bromide; Corrosion; Impedance spectroscopy; Stainless steel; Inhibitors | Issue Date | 2013 | Publisher | Elsevier | Journal | Arabian Journal of Chemistry | DOI | doi:10.1016/j.arabjc.2010.11.002 |
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