LrgpV1, Main, Exploration, bibRecord, 001C32

Electrodeposition of Ni-Co alloys from sulfamate baths

Identifieur interne : 001C32 ( Main/Exploration ); précédent : 001C31; suivant : 001C33

Electrodeposition of Ni-Co alloys from sulfamate baths

Auteurs : S. Goldbach [France] ; R. De Kermadec [France] ; François Lapicque [France]

Source :

Journal of applied electrochemistry [ 0021-891X ] ; 2000.

RBID : Pascal:00-0227395

Descripteurs français

Pascal (Inist)
- Etude expérimentale, Interface électrode électrolyte, Dépôt électrolytique, Alliage base nickel, Alliage base cobalt, Alliage binaire, Electrode disque tournant, Solution électrolyte, Solution aqueuse, Mécanisme croissance, Inhibition chimique, Adsorption électrode, Caractéristique électrochimique, Polarisation électrochimique, Distribution courant, Impédance électrode, Effet composition, Méthode galvanostatique, Amidosulfurique acide.

English descriptors

KwdEn :
- Aqueous solution, Binary alloy, Chemical inhibition, Cobalt base alloys, Composition effect, Current distribution, Electrochemical characteristic, Electrochemical polarization, Electrode adsorption, Electrode electrolyte interface, Electrode impedance, Electrodeposition, Electrolyte solution, Experimental study, Galvanostatic method, Growth mechanism, Nickel base alloys, Rotating disk electrode.

Abstract

The paper describes the results of electrochemical investigations of Ni-Co deposition from a sulfamate bath in the presence of boric acid and two additives. The individual deposition of nickel was shown to be partly inhibited by the adsorption of sulfamate ions at low polarization; such inhibition was not observed for cobalt. The introduction of saccharin at 100 ppm, with a wetting agent seems to hinder sulfamate adsorption and Ni deposition departs at less cathodic potentials. The presence of cobalt has no effect on nickel deposition, whereas cobalt deposition is hindered by the presence of nickel in the bath. Galvanostatic deposition was carried out at the surface of a RDE and with a rotating cylinder Hull cell. At low current densities deposits with a Co content of approx. 40% were produced, but this content was shown to decrease with the applied current density. Examination of experimental data showed that cobalt deposition is diffusion-controlled and that Co content decreases with the applied current density relative to the limiting current density.

Affiliations:

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Le document en format XML

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<front><div type="abstract" xml:lang="en">The paper describes the results of electrochemical investigations of Ni-Co deposition from a sulfamate bath in the presence of boric acid and two additives. The individual deposition of nickel was shown to be partly inhibited by the adsorption of sulfamate ions at low polarization; such inhibition was not observed for cobalt. The introduction of saccharin at 100 ppm, with a wetting agent seems to hinder sulfamate adsorption and Ni deposition departs at less cathodic potentials. The presence of cobalt has no effect on nickel deposition, whereas cobalt deposition is hindered by the presence of nickel in the bath. Galvanostatic deposition was carried out at the surface of a RDE and with a rotating cylinder Hull cell. At low current densities deposits with a Co content of approx. 40% were produced, but this content was shown to decrease with the applied current density. Examination of experimental data showed that cobalt deposition is diffusion-controlled and that Co content decreases with the applied current density relative to the limiting current density.</div>
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Electrodeposition of Ni-Co alloys from sulfamate baths

Electrodeposition of Ni-Co alloys from sulfamate baths

Source :

Descripteurs français

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

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