Abstract
The corrosion behaviour of mild steel in 1M HCl for the inhibiting action of various concentrations of Chitosan Schiff base was studied using the electrochemical polarization and impedance techniques. The electrochemical studies were carried out in naturally aerated 1M HCl solution containing inhibitors in different concentrations at various temperatures. The data obtained from both the techniques showed that the efficiency of the inhibitor increased with the increase in the inhibitor concentration. The results obtained reveal that Chitosan Schiff base performed effectively as a corrosion inhibitor. The kinetic and thermodynamic parameters for mild steel corrosion and inhibitor adsorption, respectively, were determined and discussed. The mechanism of inhibition was discussed in the light of the chemical structure of the inhibiting compound and their adsorption on steel surface. The adsorption of inhibitor molecules on the metal surface was confirmed by FTIR technique.
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