Electrochemical impedance of rust film fabricated by deposition from Fe(III) in solution

Masayuki Itagaki, Harumi Araki, Isao Shit Anda, Kunihiro Watanabe, Hideki Katayama, Kazuhiko Noda

Research output: Contribution to journalArticle

Abstract

The physical and chemical properties of the rust film are quite significant for the corrosion resistance of weathering steel. The investigations of the ion-selective permeability and the ion-permeation resistance (film resistance) are necessary to characterize the rust film. In the present paper, the membrane potential and the electrochemical impedance of the rust film, which was fabricated by the precipitation of Fe(III) from the solution, were measured. The rust film showed the anion-selective permeability in the neutral solution, indicating that the pore wall in the rust film has a positive fixed charge. The measurements of electrochemical impedance of the rust film membrane were performed by four-electrode method. The working and reference electrodes were platinum wire and silver/silver chloride electrode, respectively. The current between two working electrodes was measured by controlling the alternative voltage between two reference electrodes. The electrochemical impedance showed an apparent capacitive loop on the complex plane, and the diameter of the capacitive loop corresponds to the film resistance. The ion-selective permeability and the film resistance were changed depending on the adsorption of metallic ions on the rust film.

Original languageEnglish
Pages (from-to)945-949
Number of pages5
JournalElectrochemistry
Volume75
Issue number12
Publication statusPublished - 2007 Dec

Fingerprint

Electrodes
Ions
Silver
Weathering steel
Membranes
Platinum
Permeation
Chemical properties
Anions
Corrosion resistance
Negative ions
Physical properties
Wire
Adsorption
Electric potential

Keywords

  • Adsorption of metallic ions
  • Electrochemical impedance
  • Ion-permeation resistance (film resistance)
  • Ion-selective permeability
  • Rust film

ASJC Scopus subject areas

  • Electrochemistry

Cite this

Itagaki, M., Araki, H., Anda, I. S., Watanabe, K., Katayama, H., & Noda, K. (2007). Electrochemical impedance of rust film fabricated by deposition from Fe(III) in solution. Electrochemistry, 75(12), 945-949.

Electrochemical impedance of rust film fabricated by deposition from Fe(III) in solution. / Itagaki, Masayuki; Araki, Harumi; Anda, Isao Shit; Watanabe, Kunihiro; Katayama, Hideki; Noda, Kazuhiko.

In: Electrochemistry, Vol. 75, No. 12, 12.2007, p. 945-949.

Research output: Contribution to journalArticle

Itagaki, M, Araki, H, Anda, IS, Watanabe, K, Katayama, H & Noda, K 2007, 'Electrochemical impedance of rust film fabricated by deposition from Fe(III) in solution', Electrochemistry, vol. 75, no. 12, pp. 945-949.
Itagaki M, Araki H, Anda IS, Watanabe K, Katayama H, Noda K. Electrochemical impedance of rust film fabricated by deposition from Fe(III) in solution. Electrochemistry. 2007 Dec;75(12):945-949.
Itagaki, Masayuki ; Araki, Harumi ; Anda, Isao Shit ; Watanabe, Kunihiro ; Katayama, Hideki ; Noda, Kazuhiko. / Electrochemical impedance of rust film fabricated by deposition from Fe(III) in solution. In: Electrochemistry. 2007 ; Vol. 75, No. 12. pp. 945-949.
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