6533b86dfe1ef96bd12c9413
RESEARCH PRODUCT
Laser depassivation of a channel flow double-electrode: A new technique in repassivation studies
Roland OltraG.m. IndrianjafyHisasi TakenoutiMichel Keddamsubject
General Chemical EngineeringMetallurgyInorganic chemistryGeneral ChemistryLaserElectrochemistryCorrosionOpen-channel flowlaw.inventionchemistry.chemical_compoundChemical specieschemistrylawElectrodeGeneral Materials ScienceAnodic dissolutionPerchloric aciddescription
Abstract A powerful tool for distinguishing between the different electrochemical steps involved during a depassivation-repassivation sequence was developed by combining the pulsed laser depassivation technique with an hydrodynamic electrochemical method: the channel flow double-electrode (CFDE). This experiment consisted of transporting the chemical species (Fe 2+ ) released by a depassivated iron electrode to a collecting electrode where these species were oxidized. A qualitative idea of the relative contribution of the anodic dissolution to the repassivation behavior was obtained. For a passive iron in acidic solution it was found that about 15% of the total charge is related to anodic dissolution.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1993-01-01 | Corrosion Science |