Kinetics of iron passivation and corrosion in molten alkali nitrates

Autores
Arvia, Alejandro Jorge; Podestá, José J.; Piatti, Roberto C. V.
Año de publicación
1972
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The electrochemical behaviour of iron anodes in molten alkali nitrates has been investigated at temperatures ranging from ca 240–320°C. The E/I curves exhibit a potential region where the electrode passivates. Two different oxidized states of the passive iron surface exist. Within definite potential regions, the oxidation of nitrite and iron occurs, the latter being characterized by a Tafel slope of 2RT/F. At high positive potentials the breakdown of passivity is observed. Results are interpreted in terms of the stability of possible iron oxides during the electrode reaction. The kinetics of nitrite and nitrate ion oxidation on the passive surface is discussed on the basis of previous work. A comparison between iron passivation and corrosion in molten nitrites and nitrates is made.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Materia
Ciencias Exactas
Química
Kinetics
Electrochemical behaviour
Nitrite
Iron
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/121835
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/121835
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Kinetics of iron passivation and corrosion in molten alkali nitratesArvia, Alejandro JorgePodestá, José J.Piatti, Roberto C. V.Ciencias ExactasQuímicaKineticsElectrochemical behaviourNitriteIronThe electrochemical behaviour of iron anodes in molten alkali nitrates has been investigated at temperatures ranging from ca 240–320°C. The E/I curves exhibit a potential region where the electrode passivates. Two different oxidized states of the passive iron surface exist. Within definite potential regions, the oxidation of nitrite and iron occurs, the latter being characterized by a Tafel slope of 2RT/F. At high positive potentials the breakdown of passivity is observed. Results are interpreted in terms of the stability of possible iron oxides during the electrode reaction. The kinetics of nitrite and nitrate ion oxidation on the passive surface is discussed on the basis of previous work. A comparison between iron passivation and corrosion in molten nitrites and nitrates is made.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas1972info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf33-44http://sedici.unlp.edu.ar/handle/10915/121835enginfo:eu-repo/semantics/altIdentifier/issn/0013-4686info:eu-repo/semantics/altIdentifier/doi/10.1016/0013-4686(72)85005-9info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-22T17:09:50Zoai:sedici.unlp.edu.ar:10915/121835Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 17:09:50.392SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Kinetics of iron passivation and corrosion in molten alkali nitrates
title Kinetics of iron passivation and corrosion in molten alkali nitrates
spellingShingle Kinetics of iron passivation and corrosion in molten alkali nitrates
Arvia, Alejandro Jorge
Ciencias Exactas
Química
Kinetics
Electrochemical behaviour
Nitrite
Iron
title_short Kinetics of iron passivation and corrosion in molten alkali nitrates
title_full Kinetics of iron passivation and corrosion in molten alkali nitrates
title_fullStr Kinetics of iron passivation and corrosion in molten alkali nitrates
title_full_unstemmed Kinetics of iron passivation and corrosion in molten alkali nitrates
title_sort Kinetics of iron passivation and corrosion in molten alkali nitrates
dc.creator.none.fl_str_mv Arvia, Alejandro Jorge
Podestá, José J.
Piatti, Roberto C. V.
author Arvia, Alejandro Jorge
author_facet Arvia, Alejandro Jorge
Podestá, José J.
Piatti, Roberto C. V.
author_role author
author2 Podestá, José J.
Piatti, Roberto C. V.
author2_role author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Química
Kinetics
Electrochemical behaviour
Nitrite
Iron
topic Ciencias Exactas
Química
Kinetics
Electrochemical behaviour
Nitrite
Iron
dc.description.none.fl_txt_mv The electrochemical behaviour of iron anodes in molten alkali nitrates has been investigated at temperatures ranging from ca 240–320°C. The E/I curves exhibit a potential region where the electrode passivates. Two different oxidized states of the passive iron surface exist. Within definite potential regions, the oxidation of nitrite and iron occurs, the latter being characterized by a Tafel slope of 2RT/F. At high positive potentials the breakdown of passivity is observed. Results are interpreted in terms of the stability of possible iron oxides during the electrode reaction. The kinetics of nitrite and nitrate ion oxidation on the passive surface is discussed on the basis of previous work. A comparison between iron passivation and corrosion in molten nitrites and nitrates is made.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
description The electrochemical behaviour of iron anodes in molten alkali nitrates has been investigated at temperatures ranging from ca 240–320°C. The E/I curves exhibit a potential region where the electrode passivates. Two different oxidized states of the passive iron surface exist. Within definite potential regions, the oxidation of nitrite and iron occurs, the latter being characterized by a Tafel slope of 2RT/F. At high positive potentials the breakdown of passivity is observed. Results are interpreted in terms of the stability of possible iron oxides during the electrode reaction. The kinetics of nitrite and nitrate ion oxidation on the passive surface is discussed on the basis of previous work. A comparison between iron passivation and corrosion in molten nitrites and nitrates is made.
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/10915/121835
url http://sedici.unlp.edu.ar/handle/10915/121835
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0013-4686
info:eu-repo/semantics/altIdentifier/doi/10.1016/0013-4686(72)85005-9
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
dc.format.none.fl_str_mv application/pdf
33-44
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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