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Vol. 25 No. 2 (2013): Vol 25 Issue 2

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Electrochemical and Surface Characterization Studies of New Triazole Derivatives on Mild Steel

https://doi.org/10.14233/ajchem.2013.13238
V. Manivannan
Department of Chemistry, Paavai College of Engineering, Namakkal-637 018, India
D. Gopi
Department of Chemistry, Periyar University, Salem-636 011, India
L. Kavitha
Department of Physics, Periyar University, Salem-636 011, India

Corresponding Author(s) : V. Manivannan

manivannanv1971@gmail.com

Asian Journal of Chemistry, Vol. 25 No. 2 (2013): Vol 25 Issue 2

Abstract

Corrosion inhibition by Zn2+, 4-phosphonobutyric acid (4-PBA) and two new benzotriazole derivatives namely 1-(2-pyrrolecarbonyl)-benzotriazole and 1-(2-thienylcarbonyl)benzotriazole on mild steel in aqueous media has been investigated by weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy. Further characterization using XRD and SEM demonstrates the adsorption of inhibitor and the formation of corrosion products on the mild steel surface, respectively. Combination of 1-(2-pyrrolecarbonyl)benzotriazole and 1-(2-thienylcarbonyl)benzotriazole along with Zn2+ and 4-phosphonobutyric acid shows better corrosion inhibition efficiency than other inhibitor combinations and the individual inhibitors.

Keywords

Mild steel Benzotriazole Corrosion Potentiodynamic polarization Inhibition
Manivannan, V., Gopi, D., & Kavitha, L. (2012). Electrochemical and Surface Characterization Studies of New Triazole Derivatives on Mild Steel. Asian Journal of Chemistry, 25(2), 957–961. https://doi.org/10.14233/ajchem.2013.13238
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