The anodic behaviour of nickel in molten sodium-nitrate-potassium-nitrate eutectic

Autores
Arvia, Alejandro Jorge; Piatti, Roberto C. V.; Podestá, José J.
Año de publicación
1972
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The kinetic behaviour of nickel anodes immersed in molten sodium-nitrate-potassium-nitrate eutectic has been investigated in the temperature range 244-314°C with steady and non-steady electrochemical methods. The metal passivates by formation of a NiO layer of an average thickness 11 A. A characteristic passivation potential is established, probably associated to a mixed potential, the over-all reaction being 2(Na, K)NO3 + Ni = NiO + 2NO2 + (Na, K)2O. Beyond the passivity region the dissolution of the passive film occurs, at an anode potential where both NOI- and oxide ions are able to discharge. The likely over-all electrochemical processes are envisaged with the aid of potential/p04- diagrams. The considerably changing electrode roughness make a mechanistic interpretation of the anodic processes very uncertain at present.
Facultad de Ciencias Exactas
Materia
Química
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/167509
Acceder
id SEDICI_6bdd0a33572093425fe11ab427c1824d
oai_identifier_str oai:sedici.unlp.edu.ar:10915/167509
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling The anodic behaviour of nickel in molten sodium-nitrate-potassium-nitrate eutecticArvia, Alejandro JorgePiatti, Roberto C. V.Podestá, José J.QuímicaThe kinetic behaviour of nickel anodes immersed in molten sodium-nitrate-potassium-nitrate eutectic has been investigated in the temperature range 244-314°C with steady and non-steady electrochemical methods. The metal passivates by formation of a NiO layer of an average thickness 11 A. A characteristic passivation potential is established, probably associated to a mixed potential, the over-all reaction being 2(Na, K)NO<SUB>3</SUB> + Ni = NiO + 2NO<SUB>2</SUB> + (Na, K)<SUB>2</SUB>O. Beyond the passivity region the dissolution of the passive film occurs, at an anode potential where both NOI- and oxide ions are able to discharge. The likely over-all electrochemical processes are envisaged with the aid of potential/p04- diagrams. The considerably changing electrode roughness make a mechanistic interpretation of the anodic processes very uncertain at present.Facultad de Ciencias Exactas1972info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf901-913http://sedici.unlp.edu.ar/handle/10915/167509enginfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-22T17:25:32Zoai:sedici.unlp.edu.ar:10915/167509Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 17:25:32.723SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv The anodic behaviour of nickel in molten sodium-nitrate-potassium-nitrate eutectic
title The anodic behaviour of nickel in molten sodium-nitrate-potassium-nitrate eutectic
spellingShingle The anodic behaviour of nickel in molten sodium-nitrate-potassium-nitrate eutectic
Arvia, Alejandro Jorge
Química
title_short The anodic behaviour of nickel in molten sodium-nitrate-potassium-nitrate eutectic
title_full The anodic behaviour of nickel in molten sodium-nitrate-potassium-nitrate eutectic
title_fullStr The anodic behaviour of nickel in molten sodium-nitrate-potassium-nitrate eutectic
title_full_unstemmed The anodic behaviour of nickel in molten sodium-nitrate-potassium-nitrate eutectic
title_sort The anodic behaviour of nickel in molten sodium-nitrate-potassium-nitrate eutectic
dc.creator.none.fl_str_mv Arvia, Alejandro Jorge
Piatti, Roberto C. V.
Podestá, José J.
author Arvia, Alejandro Jorge
author_facet Arvia, Alejandro Jorge
Piatti, Roberto C. V.
Podestá, José J.
author_role author
author2 Piatti, Roberto C. V.
Podestá, José J.
author2_role author
author
dc.subject.none.fl_str_mv Química
topic Química
dc.description.none.fl_txt_mv The kinetic behaviour of nickel anodes immersed in molten sodium-nitrate-potassium-nitrate eutectic has been investigated in the temperature range 244-314°C with steady and non-steady electrochemical methods. The metal passivates by formation of a NiO layer of an average thickness 11 A. A characteristic passivation potential is established, probably associated to a mixed potential, the over-all reaction being 2(Na, K)NO<SUB>3</SUB> + Ni = NiO + 2NO<SUB>2</SUB> + (Na, K)<SUB>2</SUB>O. Beyond the passivity region the dissolution of the passive film occurs, at an anode potential where both NOI- and oxide ions are able to discharge. The likely over-all electrochemical processes are envisaged with the aid of potential/p04- diagrams. The considerably changing electrode roughness make a mechanistic interpretation of the anodic processes very uncertain at present.
Facultad de Ciencias Exactas
description The kinetic behaviour of nickel anodes immersed in molten sodium-nitrate-potassium-nitrate eutectic has been investigated in the temperature range 244-314°C with steady and non-steady electrochemical methods. The metal passivates by formation of a NiO layer of an average thickness 11 A. A characteristic passivation potential is established, probably associated to a mixed potential, the over-all reaction being 2(Na, K)NO<SUB>3</SUB> + Ni = NiO + 2NO<SUB>2</SUB> + (Na, K)<SUB>2</SUB>O. Beyond the passivity region the dissolution of the passive film occurs, at an anode potential where both NOI- and oxide ions are able to discharge. The likely over-all electrochemical processes are envisaged with the aid of potential/p04- diagrams. The considerably changing electrode roughness make a mechanistic interpretation of the anodic processes very uncertain at present.
publishDate 1972
dc.date.none.fl_str_mv 1972
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/167509
url http://sedici.unlp.edu.ar/handle/10915/167509
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
dc.format.none.fl_str_mv application/pdf
901-913
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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score 12.982451

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