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Hot Corrosion Behavior of FeAl Intermetallic Compound Modified with Ti, and Cr in Molten Salt Mixture KCl-ZnCl2

Year: 2013
Type: article
Abstract: The hot corrosion behavior of Fe40Al intermetallic alloyed with 2.5 at. % Cr and Ti in KCl-ZnCl2 (1:1M) at 450°C has been evaluated by using electrochemical techniques. Techniques included potentiodynamic polarization curves, linear polarization resistance (LPR) and electrochemical impedance spectroscopy (EIS) measurements. Furthermore thermodynamic stability phase diagrams were calculated and elaborated in order to describe the corrosion process. Results have shown that additions of both Cr and Ti increased the corrosion rate, besides the alloy was passivated by adding Cr. Addition of Ti induced a better corrosion performance than Fe40Al2.5Cr alloy, this behavior is due to the formation of a non-porous aluminum oxide layer modified with titanium oxide. Corrosion behavior is explained in terms of the stability of the corrosion products formed film.
DOI: 10.1016/s1452-3981(23)14844-9
Authors: R.A. Rodríguez-Diaz, J. Uruchurtu-chavarín, J. Porcayo-Calderon, J.M. López-Oglesby, M.E. Mendoza, J.J. Ramos-Hernández, S. Valdez, A. Bedolla
Institutions: Universidad Autónoma del Estado de México, Universidad Autónoma del Estado de Morelos, Universidad Popular Autónoma del Estado de Puebla, Benemérita Universidad Autónoma de Puebla, Universidad Nacional Autónoma de México, Universidad Michoacana de San Nicolás de Hidalgo
Language: English
Field: Chemistry
Open Access status: gold
Estimated APC paid: $1,670
OpenAlex ID: W4382583071
FWCI: 0.199
Cites: 31
Cited by: 5
Related to: 10