6533b872fe1ef96bd12d2f0b
RESEARCH PRODUCT
Chloride role in the surface of nickel electrode
Francisco VicenteJuan A BastosJosé Juan García-jareñoMirta Raquel Barbosasubject
PassivationGeneral Chemical EngineeringInorganic chemistrychemistry.chemical_elementChlorideDielectric spectroscopyCorrosion inhibitorchemistry.chemical_compoundNickelAdsorptionchemistryElectrochemistrymedicinePitting corrosionDissolutionmedicine.drugdescription
The chloride ion participation in the dissolution process on nickel electrodes in acid media as well as in the formation of the passive layer and in the pitting corrosion induction were studied. Composite electrodes containing nickel powder dispersed in a polymeric matrix show similar processes to those observed in polycrystalline nickel. Furthermore, phenformine hydrochloride inhibits the dissolution process due to the adsorption of the organic cation on the metal surface, although it does not protect the metal from pitting corrosion. Electrochemical impedance spectroscopy data allowed us to propose a physical model for the role of chloride ion in the dissolution and passivation processes of nickel electrodes.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1998-11-01 | Electrochimica Acta |