Benzothiazole Derivatives as Corrosion Inhibitors for Carbon Steel in 1 M H3PO4 Solutions
Fouda, A., Diab, M., El-Sonbaty, A., Hassan, S. (2012). Benzothiazole Derivatives as Corrosion Inhibitors for Carbon Steel in 1 M H3PO4 Solutions. EKB Journal Management System, 1(1), 1-12. doi: 10.21608/sjdfs.2012.193997
A.S. Fouda; M. Diab; A. El-Sonbaty; Sh A. Hassan. "Benzothiazole Derivatives as Corrosion Inhibitors for Carbon Steel in 1 M H3PO4 Solutions". EKB Journal Management System, 1, 1, 2012, 1-12. doi: 10.21608/sjdfs.2012.193997
Fouda, A., Diab, M., El-Sonbaty, A., Hassan, S. (2012). 'Benzothiazole Derivatives as Corrosion Inhibitors for Carbon Steel in 1 M H3PO4 Solutions', EKB Journal Management System, 1(1), pp. 1-12. doi: 10.21608/sjdfs.2012.193997
Fouda, A., Diab, M., El-Sonbaty, A., Hassan, S. Benzothiazole Derivatives as Corrosion Inhibitors for Carbon Steel in 1 M H3PO4 Solutions. EKB Journal Management System, 2012; 1(1): 1-12. doi: 10.21608/sjdfs.2012.193997

Benzothiazole Derivatives as Corrosion Inhibitors for Carbon Steel in 1 M H3PO4 Solutions

Scientific Journal for Damietta Faculty of Science
Article 1, Volume 1, Issue 1, December 2012, Page 1-12  XML PDF (675.06 K)
Document Type: Original articles
DOI: 10.21608/sjdfs.2012.193997
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Authors
A.S. Fouda email 1; M. Diab2; A. El-Sonbaty2; Sh A. Hassan2
1Department of Chemistry, Faculty of Science, El-Mansoura University, El-Mansoura, 35516, Egypt
2Department of Chemistry, Faculty of Science, Damietta University, New Damietta, 34517, Egypt
Abstract
The inhibition of the corrosion of carbon steel in 1 M H3PO4 solutions by some benzothiazole derivatives has been investigated using weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and electrochemical frequency modulation (EFM) techniques. Inhibition was found to increase with increasing concentration of the benzothiazole derivatives but decreased with rise in temperature. The inhibition was assumed to occur via adsorption of the inhibitor molecules on the metal surface. The adsorption of these compounds on carbon steel surface obeys the Temkin's adsorption isotherm. Potentiodynamic polarization measurements showed that benzothiazole derivatives act as mixed-type inhibitors.
Keywords
Carbon steel; corrosion inhibition; benzothiazole derivatives; phosphoric acid; quantum chemical calculations
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