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International Journal of Electrochemistry
Volume 2011 (2011), Article ID 261407, 4 pages
http://dx.doi.org/10.4061/2011/261407
Research Article

Electrodeposition and Corrosion Resistance Properties of Zn-Ni/TiO2 Nano composite Coatings

1Department of Chemistry, Srinivas School of Engineering, Mukka, Mangalore 575 021, India
2Department of PG Studies and Research in Chemistry, School of Chemical Sciences, Kuvempu University, Shankaraghatta 577451, India

Received 11 March 2011; Revised 1 May 2011; Accepted 17 June 2011

Academic Editor: Benjamín R. Scharifker

Copyright © 2011 B. M. Praveen and T. V. Venkatesha. 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

Nano sized TiO2 particles were prepared by sol-gel method. TiO2 nano particles were dispersed in zinc-nickel sulphate electrolyte and thin film of Zn-Ni-TiO2 composite was generated by electrodeposition on mild steel plates. The effect of TiO2 on the corrosion behavior and hardness of the composite coatings was investigated. The film was tested for its corrosion resistance property using electrochemical, weight loss, and salt spray methods. The paper revealed higher resistance of composite coating to corrosion. Microhardness of the composite coating was determined. Scanning electron microscope images and X-ray diffraction patterns of coating revealed its fine-grain nature. Average crystalline size of the composite coating was calculated. The anticorrosion mechanism of the composite coating was also discussed.