The formation of anodic layers on annealed copper surfaces in phosphate-containing solutions at different pH

The electrochemical behaviour of Cu in different phosphate buffers is studied through electrochemical techniques combined with scanning electron microscopy and energy dispersive X-ray analysis. At pH 6.0 and 8.0 the onset of passivation is due to the anodic formation of a basic Cu(II) phosphate, whe...

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Detalles Bibliográficos
Autores principales:	Laz, María Milagros, Souto, Ricardo M., González, Sergio G., Salvarezza, Roberto Carlos, Arvia, Alejandro Jorge
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	1992
Materias:	Ciencias Exactas Química Electroquímica Cobre Fosfatos scanning electron microscopy Técnicas Electroquímicas Rayos X
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/85844
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-85844
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 Electroquímica Cobre Fosfatos scanning electron microscopy Técnicas Electroquímicas Rayos X
spellingShingle	Ciencias Exactas Química Electroquímica Cobre Fosfatos scanning electron microscopy Técnicas Electroquímicas Rayos X Laz, María Milagros Souto, Ricardo M. González, Sergio G. Salvarezza, Roberto Carlos Arvia, Alejandro Jorge The formation of anodic layers on annealed copper surfaces in phosphate-containing solutions at different pH
topic_facet	Ciencias Exactas Química Electroquímica Cobre Fosfatos scanning electron microscopy Técnicas Electroquímicas Rayos X
description	The electrochemical behaviour of Cu in different phosphate buffers is studied through electrochemical techniques combined with scanning electron microscopy and energy dispersive X-ray analysis. At pH 6.0 and 8.0 the onset of passivation is due to the anodic formation of a basic Cu(II) phosphate, whereas at pH 11.5 the passivating layer corresponds to a duplex Cu(I) oxide-Cu(II) oxide layer. The potentiostatic anodic current transients can be reproduced by a model involving the initial growth of a thin anodic layer and the simultaneous electrodissolution of Cu. The electrodissolution of passivated Cu takes place through the passivating layer. This reaction contributes to the thickening of the outer part of the passivating layer.
format	Articulo Articulo
author	Laz, María Milagros Souto, Ricardo M. González, Sergio G. Salvarezza, Roberto Carlos Arvia, Alejandro Jorge
author_facet	Laz, María Milagros Souto, Ricardo M. González, Sergio G. Salvarezza, Roberto Carlos Arvia, Alejandro Jorge
author_sort	Laz, María Milagros
title	The formation of anodic layers on annealed copper surfaces in phosphate-containing solutions at different pH
title_short	The formation of anodic layers on annealed copper surfaces in phosphate-containing solutions at different pH
title_full	The formation of anodic layers on annealed copper surfaces in phosphate-containing solutions at different pH
title_fullStr	The formation of anodic layers on annealed copper surfaces in phosphate-containing solutions at different pH
title_full_unstemmed	The formation of anodic layers on annealed copper surfaces in phosphate-containing solutions at different pH
title_sort	formation of anodic layers on annealed copper surfaces in phosphate-containing solutions at different ph
publishDate	1992
url	http://sedici.unlp.edu.ar/handle/10915/85844
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The formation of anodic layers on annealed copper surfaces in phosphate-containing solutions at different pH

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