Kinetics and mechanism of PbSO<sub>4</sub> electroformation on Pb electrodes in H<sub>2</sub>SO<sub>4</sub> aqueous solutions

The electrochemical processes related to the passivation of Pb in 5 M H<sub>2</sub>SO<sub>4</sub> at 25°C, have been investigated combining a rotating ring-disk electrode, linear potential sweep voltammetry and potentiostatic pulse techniques complemented with scanning elec...

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Detalles Bibliográficos
Autores principales: Varela, Francisco Eduardo, Vela, María Elena, Vilche, Jorge Roberto, Arvia, Alejandro Jorge
Formato: Articulo
Lenguaje:Inglés
Publicado: 1993
Materias:
Ciencias Exactas
Química
Lead/sulphuric acid system
Lead electro-oxidation
Nucleation and growth of lead sulphate
Lead passivationlead soluble species
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/121653
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-121653
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Química
Lead/sulphuric acid system
Lead electro-oxidation
Nucleation and growth of lead sulphate
Lead passivationlead soluble species
spellingShingle Ciencias Exactas
Química
Lead/sulphuric acid system
Lead electro-oxidation
Nucleation and growth of lead sulphate
Lead passivationlead soluble species
Varela, Francisco Eduardo
Vela, María Elena
Vilche, Jorge Roberto
Arvia, Alejandro Jorge
Kinetics and mechanism of PbSO<sub>4</sub> electroformation on Pb electrodes in H<sub>2</sub>SO<sub>4</sub> aqueous solutions
topic_facet Ciencias Exactas
Química
Lead/sulphuric acid system
Lead electro-oxidation
Nucleation and growth of lead sulphate
Lead passivationlead soluble species
description The electrochemical processes related to the passivation of Pb in 5 M H<sub>2</sub>SO<sub>4</sub> at 25°C, have been investigated combining a rotating ring-disk electrode, linear potential sweep voltammetry and potentiostatic pulse techniques complemented with scanning electron microscopic imaging. The kinetics of PbSO<sub>4</sub> anodic layer growth can be explained through the initial formation of a barrier layer acting as an ionic conductor, and the transference of Pb<sup>2+</sup> cations from the substrate the conducting layer yielding Pb<sup>2+</sup> ion in the solution. These ions further contribute to passivation through the precipitation of a PbSO<sub>4</sub> passivating layer.
format Articulo
Articulo
author Varela, Francisco Eduardo
Vela, María Elena
Vilche, Jorge Roberto
Arvia, Alejandro Jorge
author_facet Varela, Francisco Eduardo
Vela, María Elena
Vilche, Jorge Roberto
Arvia, Alejandro Jorge
author_sort Varela, Francisco Eduardo
title Kinetics and mechanism of PbSO<sub>4</sub> electroformation on Pb electrodes in H<sub>2</sub>SO<sub>4</sub> aqueous solutions
title_short Kinetics and mechanism of PbSO<sub>4</sub> electroformation on Pb electrodes in H<sub>2</sub>SO<sub>4</sub> aqueous solutions
title_full Kinetics and mechanism of PbSO<sub>4</sub> electroformation on Pb electrodes in H<sub>2</sub>SO<sub>4</sub> aqueous solutions
title_fullStr Kinetics and mechanism of PbSO<sub>4</sub> electroformation on Pb electrodes in H<sub>2</sub>SO<sub>4</sub> aqueous solutions
title_full_unstemmed Kinetics and mechanism of PbSO<sub>4</sub> electroformation on Pb electrodes in H<sub>2</sub>SO<sub>4</sub> aqueous solutions
title_sort kinetics and mechanism of pbso<sub>4</sub> electroformation on pb electrodes in h<sub>2</sub>so<sub>4</sub> aqueous solutions
publishDate 1993
url http://sedici.unlp.edu.ar/handle/10915/121653
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bdutipo_str Repositorios
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