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

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 character...

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Autores principales: Arvia, Alejandro Jorge, Piatti, Roberto C. V., Podestá, José J.
Formato: Articulo
Lenguaje:Inglés
Publicado: 1972
Materias:
Química
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/167509
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SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-167509
record_format dspace
spelling I19-R120-10915-1675092024-06-25T20:08:32Z http://sedici.unlp.edu.ar/handle/10915/167509 The anodic behaviour of nickel in molten sodium-nitrate-potassium-nitrate eutectic Arvia, Alejandro Jorge Piatti, Roberto C. V. Podestá, José J. 1972 2024-06-25T18:14:56Z en Química 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 Articulo Articulo http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) application/pdf 901-913
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Química
spellingShingle Química
Arvia, Alejandro Jorge
Piatti, Roberto C. V.
Podestá, José J.
The anodic behaviour of nickel in molten sodium-nitrate-potassium-nitrate eutectic
topic_facet Química
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.
format Articulo
Articulo
author Arvia, Alejandro Jorge
Piatti, Roberto C. V.
Podestá, José J.
author_facet Arvia, Alejandro Jorge
Piatti, Roberto C. V.
Podestá, José J.
author_sort Arvia, Alejandro Jorge
title The anodic behaviour of nickel in molten sodium-nitrate-potassium-nitrate eutectic
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 anodic behaviour of nickel in molten sodium-nitrate-potassium-nitrate eutectic
publishDate 1972
url http://sedici.unlp.edu.ar/handle/10915/167509
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