Electrochemical behaviour of copper in potassium thiocyanate solution : II. Analysis of potentiostatic current transients

The kinetics of passivity and pitting corrosion of copper in borate-boric acid buffer containing potassium thiocyanate is studied at 25°C by means of potentiostatic transients recorded at different constant potential values. Three different potential regions are distinguished. Region I, as the appli...

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Autores principales:	Figueroa, M. G., Fernández Lorenzo de Mele, Mónica Alicia, Salvarezza, Roberto Carlos, Arvia, Alejandro Jorge
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	1987
Materias:	Ciencias Exactas Química Copper Potassium thiocyanate Potentiostatic current transients
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/119434
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-119434
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 Copper Potassium thiocyanate Potentiostatic current transients
spellingShingle	Ciencias Exactas Química Copper Potassium thiocyanate Potentiostatic current transients Figueroa, M. G. Fernández Lorenzo de Mele, Mónica Alicia Salvarezza, Roberto Carlos Arvia, Alejandro Jorge Electrochemical behaviour of copper in potassium thiocyanate solution : II. Analysis of potentiostatic current transients
topic_facet	Ciencias Exactas Química Copper Potassium thiocyanate Potentiostatic current transients
description	The kinetics of passivity and pitting corrosion of copper in borate-boric acid buffer containing potassium thiocyanate is studied at 25°C by means of potentiostatic transients recorded at different constant potential values. Three different potential regions are distinguished. Region I, as the applied potential is increased, implies the successive formation of cuprous thiocyanate, cuprous and cupric oxide. This corresponds to the formation of a composite anodic layer. Region II extends from the potential of the third anodic voltammetric peak up to the breakdown potential. Region III involves the breakdown of the passive layer caused by thiocyanate ions, and the formation of different copper salts in the pits. The kinetics of the various stages is discussed in terms of an extension of the nucleation and growth mechanism following an approach which was earlier applied for explaining the initiation and growth of pitting corrosion of metals.
format	Articulo Articulo
author	Figueroa, M. G. Fernández Lorenzo de Mele, Mónica Alicia Salvarezza, Roberto Carlos Arvia, Alejandro Jorge
author_facet	Figueroa, M. G. Fernández Lorenzo de Mele, Mónica Alicia Salvarezza, Roberto Carlos Arvia, Alejandro Jorge
author_sort	Figueroa, M. G.
title	Electrochemical behaviour of copper in potassium thiocyanate solution : II. Analysis of potentiostatic current transients
title_short	Electrochemical behaviour of copper in potassium thiocyanate solution : II. Analysis of potentiostatic current transients
title_full	Electrochemical behaviour of copper in potassium thiocyanate solution : II. Analysis of potentiostatic current transients
title_fullStr	Electrochemical behaviour of copper in potassium thiocyanate solution : II. Analysis of potentiostatic current transients
title_full_unstemmed	Electrochemical behaviour of copper in potassium thiocyanate solution : II. Analysis of potentiostatic current transients
title_sort	electrochemical behaviour of copper in potassium thiocyanate solution : ii. analysis of potentiostatic current transients
publishDate	1987
url	http://sedici.unlp.edu.ar/handle/10915/119434
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bdutipo_str	Repositorios
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Electrochemical behaviour of copper in potassium thiocyanate solution : II. Analysis of potentiostatic current transients

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