Electrochemical performance of Fe40Al-X (X = Cr, Ti, Co, Ni) alloys exposed to artificial saliva

Cinthya Dinorah Arrieta-Gonzalez, Roberto Ademar Rodriguez-Diaz, Jan Mayen, Rogel Fernando Retes-Mantilla, María Teresa Torres-Mancera, Lya Adlih Oros-Méndez, Héctor Cruz-Mejía, Nestor Starlin Flores-Garcia, Jesús Porcayo-Calderon*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Fe-Al intermetallic compounds have been considered excellent candidates as alternative alloys for various applications in corrosive environments compared to other Fe-based alloys. Their excellent corrosion resistance is due to the development of an Al-based passive layer. The performance of the passive layer can be improved by adding a third alloy element. Therefore, in this study the electrochemical performance of the Fe40Al intermetallic alloy modified by the addition of a third alloy element (Cr, Ti, Co, Ni) is evaluated. The corrosion resistance of intermetallic alloys has been evaluated by electrochemical tests (potentiodynamic polarization curves, and measurements of open circuit potential, linear polarization and electrochemical impedance) in artificial saliva. The performance of intermetallic alloys was compared with that of Ti. The results obtained showed that the addition of Ni and Ti substantially improves the corrosion resistance of the base intermetallic. The corrosion resistance shown is comparable or greater than that shown by Ti. However, the addition of Co reduces the corrosion resistance of the base intermetallic.

Original languageEnglish
Article number1095
JournalMaterials
Volume13
Issue number5
DOIs
StatePublished - 1 Mar 2020
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2020 by the authors.

Keywords

  • Artificial saliva
  • Biomaterials
  • Corrosion
  • Electrochemical technics
  • Intermetallics

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