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International Journal of Corrosion
Volume 2014 (2014), Article ID 214705, 8 pages
http://dx.doi.org/10.1155/2014/214705
Research Article

Corrosion Behavior of A356-10 Vol.% SiC Composites Cast by Gravity and Squeeze Casting in H2SO4 Solutions

1Department of Materials Engineering, Faculty of Engineering, Bu-Ali Sina University, Hamedan 65178-38695, Iran
2Department of Materials Engineering, Faculty of Mechanical Engineering, Shahid Rajaee Teacher Training University, Tehran 16785-136, Iran

Received 17 February 2014; Revised 18 June 2014; Accepted 18 June 2014; Published 8 July 2014

Academic Editor: Flavio Deflorian

Copyright © 2014 A. Fattah-alhosseini 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

Corrosion behavior of A356-10 vol.% SiC composites cast by gravity and squeeze casting is evaluated. For this purpose, prepared samples were immersed in H2SO4 solution for 2 hrs. at open circuit potential. Tafel polarization and electrochemical impedance spectroscopy (EIS) were carried out to study the corrosion resistance of composites. The results showed that corrosion resistance of composites cast by squeeze casting is higher than that of the gravity cast composites. The micrographs of scanning electron microscope (SEM) clearly showed the squeeze casting composites exhibit a good dispersion/matrix interface when compared with composites produced by gravity casting.