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Vol. 26 No. 7 (2014): Vol 26 Issue 7

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Investigation of Effects of Some Schiff Bases on Behaviour of Mild Steel in Acidic Medium

https://doi.org/10.14233/ajchem.2014.16859
H. Kahyaoglu
Faculty of Science Education, University of Nigde, 51100 Nigde, Turkey
M. Tuncel
Faculty of Science Education, University of Nigde, 51100 Nigde, Turkey

Corresponding Author(s) : M. Tuncel

mtuncel@nigde.edu.tr

Asian Journal of Chemistry, Vol. 26 No. 7 (2014): Vol 26 Issue 7

Abstract

This study investigated the effects on the behaviour of mild steel in 0.1 M HCl and 0.1M H2SO4 solution of the [4-(3-methoxy-salicylideneamino)-5-hydroxynaphthalene-2,7-disulfonic acid diisodium salt (L1) and 4-(3-methoxysalicyaldimino)-5-hydroxy-6-(2-nitrophenylazo)-2,7-naphthalene disulfonic acid disodium salt (L2) in different concentrations with current-potential and electrochemical impedance spectroscopy (EIS) techniques. Polarization curves revealed that Schiff bases are mixed type inhibitors. Adsorption of Schiff bases on mild steel surface is spontaneous and obeys Langmuir's isotherm. As a result, the inhibition efficiency of L2 is higher than L1 for the studied medium. Moreover, inhibition efficiency increases with increase in the concentration of the inhibitor.

Keywords

Schiff base Inhibitor Impedance spectroscopy Acid corrosion Mild steel
Kahyaoglu, H., & Tuncel, M. (2014). Investigation of Effects of Some Schiff Bases on Behaviour of Mild Steel in Acidic Medium. Asian Journal of Chemistry, 26(7), 2177–2181. https://doi.org/10.14233/ajchem.2014.16859
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