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http://dx.doi.org/10.5012/jkcs.2011.55.2.268

Effect of β-Blocker Inhibitors on Aluminum Corrosion  

Fouda, A. S. (Department of Chemistry, Faculty of Science, El-Mansoura University)
El-Ewady, G. Y. (Department of Chemistry, Faculty of Science, El-Mansoura University)
Shalabi, K. (Department of Chemistry, Faculty of Science, El-Mansoura University)
Publication Information
Journal of the Korean Chemical Society / v.55, no.2, 2011 , pp. 268-278 More about this Journal
Abstract
Corrosion of aluminum in 0.1 M HCl solution in the absence and presence of ${\beta}$-blocker inhibitors (atenolol, propranolol, timolol and nadolol) was investigated using weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The inhibition efficiency increased with inhibitor concentration and decreased with rise of temperature. Potentiodynamic polarization curves revealed that they acted as cathodic inhibitors. Some thermodynamic parameters were calculated and discussed. All inhibitors were adsorbed on Al surface obeying Frumkin isotherm. All EIS tests exhibited one capacitive loop which indicates that the corrosion reaction is controlled by charge transfer process. The inhibition efficiencies of all test methods were in good agreement.
Keywords
Aluminum; inhibition corrosion; ${\beta}$-blocker drugs; HCl;
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