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Journal of Analytical Methods in Chemistry
Volume 2012, Article ID 798043, 4 pages
http://dx.doi.org/10.1155/2012/798043
Research Article

Contribution to the Study of the Relation between Microstructure and Electrochemical Behavior of Iron-Based FeCoC Ternary Alloys

1Laboratory of Electrochemistry, Corrosion, Metallurgy and Inorganic Chemistry, Faculty of Chemistry, University of Science and Technology Houari Boumediene, P.O. Box 32, El-Alia, Bab Ezzouar, Algiers 16111, Algeria
2Laboratory of Materials Science and Engineering, University of Science and Technology Houari Boumediene, P.O. Box 32, El-Alia, Bab Ezzouar, Algiers 16111, Algeria

Received 21 November 2011; Accepted 6 December 2011

Academic Editor: Christophe A. Marquette

Copyright © 2012 Farida Benhalla-Haddad 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

This work deals with the relation between microstructure and electrochemical behavior of four iron-based FeCoC ternary alloys. First, the arc-melted studied alloys were characterized using differential thermal analyses and scanning electron microscopy. The established solidification sequences of these alloys show the presence of two primary crystallization phases (δ(Fe) and graphite) as well as two univariante lines : peritectic L + š›æ ( F e ) ā†” š›¾ ( F e ) and eutectic L ā†” š›¾ ( F e ) + C g r a p h i t e . The ternary alloys were thereafter studied in nondeaerated solution of 10−3 M NaHCO3 + 10−3 M Na2SO4, at 25°C, by means of the potentiodynamic technique. The results indicate that the corrosion resistance of the FeCoC alloys depends on the carbon amount and the morphology of the phases present in the studied alloys.