Abstract

N. Banumathi* and N. Kasthuri

The inhibition of corrosion on mild steel in 1M H2SO4 by a heterocyclic compound namely cefuroxime axetil has been studied by weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy methods. The adsorption characters of the inhibitor on mild steel, free energy change and energy of activation of the inhibition process have been calculated from the results. The inhibition efficiency increases with inhibitor concentration and decreases with temperature. The adsorption of the inhibitor on the mild steel surface obeys Langmuir adsorption isotherm. Potentiodynamic polarization studies show that the inhibitor behaves as mixed type. Addition of halide ions enhances the inhibition efficiency.

Corrosion inhibition; mild steel; Cefuroxime axetil; Inhibition efficiency; Langmuir adsorption

[ View HTML Full Text]