Effect of copper-enriched layers on localized corrosion of aluminium-copper alloys

Copper-enriched layers were developed onto aluminum-copper alloys using alkaline etching in sodium hydroxide, for both, sputter deposited and bulk conditions. Enriched alloys were evaluated by potentiodynamic polarization in sodium chloride solution in order to determine the effect of the enriched l...

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Main Authors: Arenas-Vara, María Ángeles, Skeldon, Peter, García-Vergara, Sandra Judith
Format: Online
Language:eng
Published: Universidad Pedagógica y Tecnológica de Colombia 2018
Subjects:
Online Access:https://revistas.uptc.edu.co/index.php/ingenieria/article/view/8016
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author Arenas-Vara, María Ángeles
Skeldon, Peter
García-Vergara, Sandra Judith
author_facet Arenas-Vara, María Ángeles
Skeldon, Peter
García-Vergara, Sandra Judith
author_sort Arenas-Vara, María Ángeles
collection OJS
description Copper-enriched layers were developed onto aluminum-copper alloys using alkaline etching in sodium hydroxide, for both, sputter deposited and bulk conditions. Enriched alloys were evaluated by potentiodynamic polarization in sodium chloride solution in order to determine the effect of the enriched layers on the pitting potential of the alloys. Rutherford backscattering spectroscopy was employed to quantify the enrichments and their locations just beneath the alumina-based oxides remaining from the etching. For the sputter deposited aluminum-copper alloys, the results show some scattering of the pitting potential data, and no correlation between pitting potential and the alloy enriched layer. In the case of bulk Al-2wt.%Cu alloy, with the copper in solid-solution, the pitting potential increased for the enriched specimens, indicating also a different pit morphology, with respect to the non-enriched alloy.
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spelling oai:oai.revistas.uptc.edu.co:article-80162022-06-15T16:03:30Z Effect of copper-enriched layers on localized corrosion of aluminium-copper alloys Efecto de las capas de enriquecimiento de cobre sobre corrosión localizada en aleaciones aluminio-cobre Arenas-Vara, María Ángeles Skeldon, Peter García-Vergara, Sandra Judith aluminium-copper alloys anodizing copper enrichment pitting aleaciones aluminio-cobre anodizado enriquecimiento de cobre potencial de picadura Copper-enriched layers were developed onto aluminum-copper alloys using alkaline etching in sodium hydroxide, for both, sputter deposited and bulk conditions. Enriched alloys were evaluated by potentiodynamic polarization in sodium chloride solution in order to determine the effect of the enriched layers on the pitting potential of the alloys. Rutherford backscattering spectroscopy was employed to quantify the enrichments and their locations just beneath the alumina-based oxides remaining from the etching. For the sputter deposited aluminum-copper alloys, the results show some scattering of the pitting potential data, and no correlation between pitting potential and the alloy enriched layer. In the case of bulk Al-2wt.%Cu alloy, with the copper in solid-solution, the pitting potential increased for the enriched specimens, indicating also a different pit morphology, with respect to the non-enriched alloy. Fueron desarrolladas capas de enriquecimiento de cobre mediante ataque alcalino en hidróxido de sodio sobre aleaciones aluminio-cobre. Se usaron aleaciones tanto depositadas por pulverización catódica, como vaciadas convencionalmente. Las aleaciones con las capas de enriquecimiento de cobre fueron estudiadas mediante polarización potenciodinámica en una solución de cloruro de sodio, para poder determinar si existe alguna correlación entre las capas de enriquecimiento de cobre y el potencial de picadura de las aleaciones. Los resultados no son concluyentes en el caso de las aleaciones depositadas por pulverización catódica; sin embargo, en el caso de la aleación en condición de vaciado, con el cobre en solución sólida, el potencial de picadura aumenta por la presencia de la capa de enriquecimiento, mostrando además una morfología diferente. Universidad Pedagógica y Tecnológica de Colombia 2018-05-15 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion research investigación application/pdf application/xml https://revistas.uptc.edu.co/index.php/ingenieria/article/view/8016 10.19053/01211129.v27.n48.2018.8016 Revista Facultad de Ingeniería; Vol. 27 No. 48 (2018); 7-15 Revista Facultad de Ingeniería; Vol. 27 Núm. 48 (2018); 7-15 2357-5328 0121-1129 eng https://revistas.uptc.edu.co/index.php/ingenieria/article/view/8016/6460 https://revistas.uptc.edu.co/index.php/ingenieria/article/view/8016/7184 Copyright (c) 2018 María Ángeles Arenas-Vara, Peter Skeldon, Sandra Judith García-Vergara
spellingShingle aluminium-copper alloys
anodizing
copper enrichment
pitting
aleaciones aluminio-cobre
anodizado
enriquecimiento de cobre
potencial de picadura
Arenas-Vara, María Ángeles
Skeldon, Peter
García-Vergara, Sandra Judith
Effect of copper-enriched layers on localized corrosion of aluminium-copper alloys
title Effect of copper-enriched layers on localized corrosion of aluminium-copper alloys
title_alt Efecto de las capas de enriquecimiento de cobre sobre corrosión localizada en aleaciones aluminio-cobre
title_full Effect of copper-enriched layers on localized corrosion of aluminium-copper alloys
title_fullStr Effect of copper-enriched layers on localized corrosion of aluminium-copper alloys
title_full_unstemmed Effect of copper-enriched layers on localized corrosion of aluminium-copper alloys
title_short Effect of copper-enriched layers on localized corrosion of aluminium-copper alloys
title_sort effect of copper enriched layers on localized corrosion of aluminium copper alloys
topic aluminium-copper alloys
anodizing
copper enrichment
pitting
aleaciones aluminio-cobre
anodizado
enriquecimiento de cobre
potencial de picadura
topic_facet aluminium-copper alloys
anodizing
copper enrichment
pitting
aleaciones aluminio-cobre
anodizado
enriquecimiento de cobre
potencial de picadura
url https://revistas.uptc.edu.co/index.php/ingenieria/article/view/8016
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