A study of copper passivity by electrochemical impedance spectroscopy

Authors
Babic, R Metikos-Hukovic, M Jukic, A
Citation
R. Babic et al., A study of copper passivity by electrochemical impedance spectroscopy, J ELCHEM SO, 148(4), 2001, pp. B146-B151
Citations number
41
Categorie Soggetti
Physical Chemistry/Chemical Physics","Material Science & Engineering
Journal title
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
ISSN journal
00134651 → ACNP
Volume
148
Issue
4
Year of publication
2001
Pages
B146 - B151
Database
ISI
SICI code
0013-4651(200104)148:4<B146:ASOCPB>2.0.ZU;2-Q
Abstract
In situ electrochemical impedance spectroscopy was used to study the charac teristics of the passive film formed potentiodynamically on copper, in slig htly alkaline solution. This film has semiconducting properties. A strong e el-relation was established between the impedance and the changes in the co mposition and structure of the passive film. Several parameters were examin ed, such as: the ionic resistivity, rho (ox) of similar to 10(10) Omega cm, the dielectric constant, epsilon (ox) of similar to 105, and the concentra tion of charge carriers of similar to 10(20) cm(-3) (C) 2001 The Electroche mical Society. All rights reserved.