M. Thirumalaikumar* and S. Jegannathan

Department of Applied Chemistry, Sri Venkateswara College of Engineering, Pennalur, Sriperumbudur - 602105, India

DOI: 10.4152/pea.201101001

Abstract

Aromatic nitrones have been synthesized and investigated for their function as inhibitor for the corrosion of mild steel in the organic acid media – 20% formic acid and 20% acetic acid at various inhibitor concentrations in the range of 50 - 150 ppm. Weight loss measurements and potentio-dynamic polarization studies reveal that the nitrones behave as mixed type inhibitors. Among the nitrones tested, para-methyl substituted derivatives perform better as inhibitors than the un-substituted nitrones.

Keywords: corrosion inhibition, mild steel, adsorption, nitrones.

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Acknowledgement

The authors acknowledge the Principal, Sri Venkateswara College of Engineering, Pennalur, Sriperumbudur for constant encouragement and support provided to carry out this work and the Chief Scientific Officer and his associates, Technology Innovation Centre (SPIC) for the co-operation offered in carrying out the polarization studies.

* Corresponding author. E-mail address: mtkumar@svce.ac.in

Received 12 November 2009; accepted 2 February 2011