6533b86dfe1ef96bd12c9746
RESEARCH PRODUCT
Comparison of local electrochemical impedance measurements derived frombi-electrode and microcapillary techniques
Halina KrawiecVincent VignalNadine PébèreJean-baptiste Jorcinsubject
spectroscopyLocal electrochemical impedanceChemistryGeneral Chemical EngineeringMatériauxAnalytical chemistryElectrolyteDielectric spectroscopyStainless steelMicroelectrodeElectrodeMicrocapillariesElectrochemistryEquivalent circuitBi-electrodesOhmComposite materialElectrical impedanceVoltagedescription
Abstract In the present paper, local electrochemical impedance spectra were obtained on a 316L stainless steel from two configurations: a dual microelectrode (bi-electrode) and microcapillaries. With the bi-electrode, the local impedance measurements were made from the ratio of the applied voltage to the local current density calculated from the application of the ohm's law. With the use of microelectrochemical cells, the specimen surface area in contact with the electrolyte is limited by the use of glass microcapillaries and the local impedance was defined from the ratio of the local potential to the local current restricted to the analysed surface area. Differences and similarities observed in local impedance spectra obtained with the two configurations were described.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-10-01 |