The impedance characteristics of passive films on iron

Kazuhiko Noda, Tooru Tsuru, Shiro Haruyama

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The Impedance characteristics of passive films on iron have been investigated focused on the electrical potential profile in the film. Electrochemical redox reactions on the passive films were not affected by the film thickness even when increased to several ten times larger than the usual passive films. At several stages of the cathodic reduction of the films, a contact resistance of mercury through the film was measured and it was found that the resistivity of the film caused at the outermost part of the passive layer. It was concluded that the highest electrical fields in the passive films existed in this part, and that this part has different properties from the rest of the film.

Original languageEnglish
Pages (from-to)673-678
Number of pages6
JournalCorrosion Science
Volume31
Issue numberC
DOIs
Publication statusPublished - 1990
Externally publishedYes

Fingerprint

Iron
Redox reactions
Contact resistance
Mercury
Film thickness

Keywords

  • Borate solution
  • Impedance characteristics
  • Iron
  • Mercury contact method
  • Passive film
  • Surface layer

ASJC Scopus subject areas

  • Materials Science(all)
  • Metals and Alloys

Cite this

The impedance characteristics of passive films on iron. / Noda, Kazuhiko; Tsuru, Tooru; Haruyama, Shiro.

In: Corrosion Science, Vol. 31, No. C, 1990, p. 673-678.

Research output: Contribution to journalArticle

Noda, Kazuhiko ; Tsuru, Tooru ; Haruyama, Shiro. / The impedance characteristics of passive films on iron. In: Corrosion Science. 1990 ; Vol. 31, No. C. pp. 673-678.
@article{2cd9c42725a042fbb578c14f807b0e10,
title = "The impedance characteristics of passive films on iron",
abstract = "The Impedance characteristics of passive films on iron have been investigated focused on the electrical potential profile in the film. Electrochemical redox reactions on the passive films were not affected by the film thickness even when increased to several ten times larger than the usual passive films. At several stages of the cathodic reduction of the films, a contact resistance of mercury through the film was measured and it was found that the resistivity of the film caused at the outermost part of the passive layer. It was concluded that the highest electrical fields in the passive films existed in this part, and that this part has different properties from the rest of the film.",
keywords = "Borate solution, Impedance characteristics, Iron, Mercury contact method, Passive film, Surface layer",
author = "Kazuhiko Noda and Tooru Tsuru and Shiro Haruyama",
year = "1990",
doi = "10.1016/0010-938X(90)90179-9",
language = "English",
volume = "31",
pages = "673--678",
journal = "Corrosion Science",
issn = "0010-938X",
publisher = "Elsevier Limited",
number = "C",

}

TY - JOUR

T1 - The impedance characteristics of passive films on iron

AU - Noda, Kazuhiko

AU - Tsuru, Tooru

AU - Haruyama, Shiro

PY - 1990

Y1 - 1990

N2 - The Impedance characteristics of passive films on iron have been investigated focused on the electrical potential profile in the film. Electrochemical redox reactions on the passive films were not affected by the film thickness even when increased to several ten times larger than the usual passive films. At several stages of the cathodic reduction of the films, a contact resistance of mercury through the film was measured and it was found that the resistivity of the film caused at the outermost part of the passive layer. It was concluded that the highest electrical fields in the passive films existed in this part, and that this part has different properties from the rest of the film.

AB - The Impedance characteristics of passive films on iron have been investigated focused on the electrical potential profile in the film. Electrochemical redox reactions on the passive films were not affected by the film thickness even when increased to several ten times larger than the usual passive films. At several stages of the cathodic reduction of the films, a contact resistance of mercury through the film was measured and it was found that the resistivity of the film caused at the outermost part of the passive layer. It was concluded that the highest electrical fields in the passive films existed in this part, and that this part has different properties from the rest of the film.

KW - Borate solution

KW - Impedance characteristics

KW - Iron

KW - Mercury contact method

KW - Passive film

KW - Surface layer

UR - http://www.scopus.com/inward/record.url?scp=0025595187&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0025595187&partnerID=8YFLogxK

U2 - 10.1016/0010-938X(90)90179-9

DO - 10.1016/0010-938X(90)90179-9

M3 - Article

AN - SCOPUS:0025595187

VL - 31

SP - 673

EP - 678

JO - Corrosion Science

JF - Corrosion Science

SN - 0010-938X

IS - C

ER -