Mass transfer and polarization at a rotating disk electrode
โ Scribed by L. Hsueh; J. Newman
- Publisher
- Elsevier Science
- Year
- 1967
- Tongue
- English
- Weight
- 691 KB
- Volume
- 12
- Category
- Article
- ISSN
- 0013-4686
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โฆ Synopsis
Measured hmltmg currents for deposltlon of copper on a rotating copper disk from aqueous copper sulphate solutions are found to agree satlsfactordy with values calculated with conslderatlon of the concentration dependence of the physical propertles of the solution The observed electrode polarlzatlon can be traced mamly to the ohmic potential drop m these solutions of low electrical conductlvlty R&m&-Les courants-hmltes mesurCs pour la d&posltlon du cmvre sur un dlsque de cmvre tournant, & partlr de solutions aqueuses de sulfate cmvrique, sont trouds en accord, d'une mandre satlsfalsante, avec les valeurs calculBes en considerant la dCpendance entre les propnttes physiques de la solution et sa concentration La polansatlon observte de l'Clectrode peut &re prmclpalement rattachee a la chute de potentlel ohmlque, dans ces solutions de falble conductlvlte Clectrlque Zusammenfassun-Die gemessenen Grenzstrome der Abscheldung von Kupfer an rotlerenden Kupferschelben m wassrlgen Kupfersulfatlosungen stimmen befrledlgend mlt den Werten uberem,
๐ SIMILAR VOLUMES
A new model based on the surface renewal concept was proposed to discuss the turbulent mass transfer from a rotating disk. The proposed model, in which the proportionality constants are determined by using hydrodynamic data rather than mass transfer data and no adjustable parameters are included, wa
NOhfENCUWRE c bulk concentration, Mcum3 d disk diameter, cm D diffusion coefficient, cm%-' IliEn0 mass transfer limiting currenr. mAcm-' 'linl., mass trausfer limitiug currenf n&m-\*, in solutions with suspended solids nF RC? SC 11 v, 2