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International Journal of Corrosion
Volume 2015, Article ID 410120, 15 pages
http://dx.doi.org/10.1155/2015/410120
Research Article

Effect of Piperidin-4-ones on the Corrosion Inhibition of Mild Steel in 1 N H2SO4

1Department of Science and Humanities, Sri Krishna College of Engineering and Technology, Coimbatore, Tamil Nadu 641008, India
2Department of Chemistry, PSG College of Arts and Science, Coimbatore, Tamil Nadu 641014, India

Received 20 July 2014; Revised 24 December 2014; Accepted 28 December 2014

Academic Editor: Michael I. Ojovan

Copyright © 2015 Glory Tharial Xavier et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The corrosion inhibition of mild steel in 1 N sulphuric acid solution by 2,6-diphenylpiperidin-4-ones with various substituents at 3- and 3,5-positions (01–06) has been tested by weight loss, potentiodynamic polarization, electrochemical impedance spectroscopic methods, and FTIR and UV absorption spectra. The surface morphology of the mild steel specimen has been analyzed by SEM. The effect of temperature (300 to 323 ± 1 K) on the corrosion behavior of mild steel in the presence of the inhibitors (01–06) was studied using weight loss techniques. The effect of anions (Cl, Br, and I) on the corrosion behavior of mild steel in the presence of the same inhibitors was also studied by weight loss method and the synergism parameters were calculated. The adsorption characteristics of the inhibitors have been determined from the results.