Kinetics of copper passivation and pitting corrosion in Na<sub>2</sub>SO<sub>4</sub> containing dilute NaOH aqueous solution

The electrochemical behaviour of Cu in alkaline solutions containing Na<sub>2</sub>SO<sub>4</sub> was studied using potentiodynamic and potentiostatic techniques complemented by scanning electron microscopy. The presence of Na<sub>2</sub>SO<sub>4</sub>...

Descripción completa

Detalles Bibliográficos
Autores principales: Souto, Ricardo M., González, Sergio G., Salvarezza, Roberto Carlos, Arvia, Alejandro Jorge
Formato: Articulo
Lenguaje:Inglés
Publicado: 1994
Materias:
Ciencias Exactas
Química
Cobre
Metales Alcalinos
Sulfatos
Sodio
scanning electron microscopy
electrodissolution
Cinética química
Electroquímica
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/86541
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-86541
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
Cobre
Metales Alcalinos
Sulfatos
Sodio
scanning electron microscopy
electrodissolution
Cinética química
Electroquímica
spellingShingle Ciencias Exactas
Química
Cobre
Metales Alcalinos
Sulfatos
Sodio
scanning electron microscopy
electrodissolution
Cinética química
Electroquímica
Souto, Ricardo M.
González, Sergio G.
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
Kinetics of copper passivation and pitting corrosion in Na<sub>2</sub>SO<sub>4</sub> containing dilute NaOH aqueous solution
topic_facet Ciencias Exactas
Química
Cobre
Metales Alcalinos
Sulfatos
Sodio
scanning electron microscopy
electrodissolution
Cinética química
Electroquímica
description The electrochemical behaviour of Cu in alkaline solutions containing Na<sub>2</sub>SO<sub>4</sub> was studied using potentiodynamic and potentiostatic techniques complemented by scanning electron microscopy. The presence of Na<sub>2</sub>SO<sub>4</sub> enhances Cu electrodissolution through the passive layer and decreases the breakdown potential. There is a critical OH<sup>-</sup>/sulphate concentration ratio for the onset of localized corrosion. The competitive interaction between OH<sup>-</sup> and sulphate ions at the passive layer can explain the experimental data. Pit initiation fits the point defect model for passivity breakdown. Pit growth involves a number of current contributions which can be distinguished through the analysis of current transients at constant potential by using nucleation and growth models.
format Articulo
Articulo
author Souto, Ricardo M.
González, Sergio G.
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author_facet Souto, Ricardo M.
González, Sergio G.
Salvarezza, Roberto Carlos
Arvia, Alejandro Jorge
author_sort Souto, Ricardo M.
title Kinetics of copper passivation and pitting corrosion in Na<sub>2</sub>SO<sub>4</sub> containing dilute NaOH aqueous solution
title_short Kinetics of copper passivation and pitting corrosion in Na<sub>2</sub>SO<sub>4</sub> containing dilute NaOH aqueous solution
title_full Kinetics of copper passivation and pitting corrosion in Na<sub>2</sub>SO<sub>4</sub> containing dilute NaOH aqueous solution
title_fullStr Kinetics of copper passivation and pitting corrosion in Na<sub>2</sub>SO<sub>4</sub> containing dilute NaOH aqueous solution
title_full_unstemmed Kinetics of copper passivation and pitting corrosion in Na<sub>2</sub>SO<sub>4</sub> containing dilute NaOH aqueous solution
title_sort kinetics of copper passivation and pitting corrosion in na<sub>2</sub>so<sub>4</sub> containing dilute naoh aqueous solution
publishDate 1994
url http://sedici.unlp.edu.ar/handle/10915/86541
work_keys_str_mv AT soutoricardom kineticsofcopperpassivationandpittingcorrosioninnasub2subsosub4subcontainingdilutenaohaqueoussolution
AT gonzalezsergiog kineticsofcopperpassivationandpittingcorrosioninnasub2subsosub4subcontainingdilutenaohaqueoussolution
AT salvarezzarobertocarlos kineticsofcopperpassivationandpittingcorrosioninnasub2subsosub4subcontainingdilutenaohaqueoussolution
AT arviaalejandrojorge kineticsofcopperpassivationandpittingcorrosioninnasub2subsosub4subcontainingdilutenaohaqueoussolution
bdutipo_str Repositorios
_version_ 1764820489783476229

Ejemplares similares