Antibacterial drugs as environmentally-friendly corrosion inhibitors for carbon steel in acid medium

The effect of cefazolin (CZ) and cefotaxime (CT) as corrosion inhibitors for carbon steel in 0.5  M H 2 SO 4 solution was investigated by use of potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), electrochemical frequency modulation (EFM), and scanning electron microscopy (S...

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Bibliographic Details
Published in:Research on chemical intermediates 2013-03, Vol.39 (3), p.921-939
Main Authors: Abdel Nazeer, Ahmed, El-Abbasy, H. M., Fouda, A. S.
Format: Article
Language:English
Subjects:
Catalysis
Chemistry
Chemistry and Materials Science
Inorganic Chemistry
Physical Chemistry
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Summary:The effect of cefazolin (CZ) and cefotaxime (CT) as corrosion inhibitors for carbon steel in 0.5  M H 2 SO 4 solution was investigated by use of potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), electrochemical frequency modulation (EFM), and scanning electron microscopy (SEM). CZ and CT acted as mixed-type inhibitors. Inhibition increased with increasing inhibitor concentration and decreased with increasing temperature. Adsorption of the inhibitors obeyed the Langmuir adsorption isotherm. SEM confirmed inhibition by the inhibitors. Inhibition by 5 × 10 −4   M CZ and 7 × 10 −4   M CT approached 99.6 % and 90.9 %, respectively. The EIS and EFM results were in good agreement with the potentiodynamic data.
ISSN:0922-6168
1568-5675
DOI:10.1007/s11164-012-0605-y