Table of Contents
ISRN Corrosion
Volume 2014 (2014), Article ID 628604, 8 pages
http://dx.doi.org/10.1155/2014/628604
Research Article

Surface Protection of Carbon Steel by Hexanesulphonic Acid-Zinc Ion System

1PG Department of Chemistry, Jayaraj Annapackiam College for Women, Periyakulam 625601, India
2Corrosion Research Centre, PG and Research Department of Chemistry, GTN Arts College, Dindigul 624005, India
3Department of Chemistry, RVS School of Engineering and Technology, Dindigul 624005, India

Received 24 December 2013; Accepted 2 February 2014; Published 19 March 2014

Academic Editors: K. N. Allahar, L. Bazzi, A. Hermann, and B. Normand

Copyright © 2014 C. Mary Anbarasi and Susai Rajendran. 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

Inhibition of corrosion of carbon steel in dam water by hexanesulphonic acid as its sodium salt C6H13SO3Na (SHXS) in the absence and presence of a bivalent cation zinc ion (Zn2þ) has been investigated using weight loss method. Results of weight loss method indicate that inhibition efficiency (IE) increased with increase of inhibitor concentration. Polarization study reveals that SHXS-Zn2+ system controls the cathodic reaction predominantly. AC impedance spectra reveal that a protective film is formed on the metal surface. The nature of the metal surface has been analysed by Fourier Transform Infrared Spectroscopy (FTIR) and Atomic Force Microscopy (AFM).