Electrochemical behavior of electrodeposited strongly disordered Fe-Ni-Cr alloys

L. Sziráki, E. Kuzmann, M. El-Sharif, C. U. Chisholm, G. Principi, C. Tosello, A. Vértes

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Potentiodynamic and chronoamperometric polarization measurements, 57Fe conversion electron Mossbauer spectroscopy, X-ray diffractometry and electron microprobe measurements were performed on amorphous and microcsrystalline Fe-25Ni-25Cr alloys coatings electrochemically deposited at varying times in comparison with a thermally prepared alloy of the same composition. Significant differences were found among the Mossbauer spectra of electrodeposited alloys reflecting differences in the short range ordering of the dominant ferromagnetic phases. The potentiodynamic polarization curves revealed a higher ability to spontaneous passivation for the more disordered deposit while anodic dissolution was characteristic for the more ordered electrodeposits and for the crystalline thermally prepared alloy. The onset of the passivation of amorphous alloy was enhanced either by the decreased anodic dissolution or the increased hydrogen evolution rate. At the early stage of passivation, consistent passivation characterization was found both by chronoamperometric and potentiodynamic curves and by polarization resistance measurements performed at open circuit potential. (C) 2000 Published by Elsevier Science S.A.

Original languageEnglish
Pages (from-to)619-625
Number of pages7
JournalElectrochemistry Communications
Volume2
Issue number9
DOIs
Publication statusPublished - 2000

Fingerprint

Passivation
Dissolution
Polarization
Electron spectroscopy
Potentiodynamic polarization
Amorphous alloys
Mossbauer spectroscopy
X ray diffraction analysis
Hydrogen
Deposits
Crystalline materials
Coatings
Electrons
Networks (circuits)
Chemical analysis

Keywords

  • Amorphous/microcrystalline electrodeposited Fe-Ni-Cr alloys
  • Conversion electron Mossbauer spectroscopy
  • Corrosion rate, and transient electrochemical polarization
  • Spontaneous passivation
  • X-ray diffractometry

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Analytical Chemistry
  • Electrochemistry

Cite this

Electrochemical behavior of electrodeposited strongly disordered Fe-Ni-Cr alloys. / Sziráki, L.; Kuzmann, E.; El-Sharif, M.; Chisholm, C. U.; Principi, G.; Tosello, C.; Vértes, A.

In: Electrochemistry Communications, Vol. 2, No. 9, 2000, p. 619-625.

Research output: Contribution to journalArticle

Sziráki, L. ; Kuzmann, E. ; El-Sharif, M. ; Chisholm, C. U. ; Principi, G. ; Tosello, C. ; Vértes, A. / Electrochemical behavior of electrodeposited strongly disordered Fe-Ni-Cr alloys. In: Electrochemistry Communications. 2000 ; Vol. 2, No. 9. pp. 619-625.
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