Manivel, P. and Sathiyanarayanan, S. and Venkatachari, G. (2007) Influence of H1 and Cl2 Ions on Inhibitive Performance of Poly(aniline) for Iron Corrosion in Acid. Journal of Applied Polymer Science, 106. pp. 3988-3993.

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The inhibition effect of poly(aniline) on pure iron corrosion in 1M HCl and with various H1 ions and Cl2 ions concentrations was investigated by the polarization and electrochemical impedance spectroscopy methods. The results showed that poly(aniline) suppressed both cathodic and anodic processes of iron dissolution in 1M HCl by its adsorption on the iron surface according to Langmuir’s adsorption isotherm. The inhibition efficiency of poly(aniline) was found to increase with the inhibitor concentrations. Further, it was observed that, there was no significant variation in corrosion potential (Ecorr) values in the presence of inhibitors suggesting that, this polymer behaved as mixed type inhibitor. Similar studies for the inhibitor at 500 ppm in various concentrations of H1 and Cl2 ions, have shown that the inhibition efficiency decreases with decrease in concentrations of H1 ions and Cl2 ions in aqueous solution. It reveals that, the adsorption of inhibitor on iron surface is by more cationic form of inhibitor and higher efficiency at higher H1 and Cl2 ions is due to enhanced adsorption of cat ionic form of inhibitor molecules.

Item Type: Article
Uncontrolled Keywords: poly(aniline); inhibition; corrosion; iron; HCl
Subjects: Corrosion Science and Engineering
Depositing User: ttbdar CECRI
Date Deposited: 27 Mar 2012 10:58
Last Modified: 27 Mar 2012 10:58

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