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Portugaliae Electrochimica Acta
versão impressa ISSN 0872-1904
Port. Electrochim. Acta v.29 n.1 Coimbra 2011
Inhibition Effects of Nitrones on the Corrosion of Mild Steel in Organic Acid Media
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.
Full text only available in PDF format.
Texto completo disponível apenas em PDF.
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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