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

• Published in: Journal of analytical methods in chemistry Vol. 2012; no. 2012; pp. 1 - 4
• Main Authors: Benhalla-Haddad, Farida, Amara, Sif Eddine, Benchettara, Abdelkader, Taibi, Kamel, Kesri, Rafika
• Format: Journal Article
• Language: English
• Published: Cairo, Egypt Hindawi Puplishing Corporation 01.01.2012; Hindawi Publishing Corporation; Wiley
• ISSN: 2090-8865; 2090-8873
• DOI: 10.1155/2012/798043

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+δ(Fe)↔γ(Fe) and eutectic L↔γ(Fe)+Cgraphite. 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.