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Título

Influence of nitric acid pre-treatment on Al-Cu alloys

Autor Liu, Y.; Arenas, M. A.; De Frutos, A.; Damborenea, Juan de ; Conde, A. ; Skeldon, P.; Thompson, G.E.; Bailey, P.; Noakes, T.C.Q.
Palabras clave Al–Cu alloys
Nitric acid
Etching
De-smutting
Sodium hydroxide
AA2024-T3
AA7075-T6
Fecha de publicación 2008
EditorElsevier
Citación Electrochimica Acta 53: 4454-4460 (2008)
ResumenThe enrichment of copper alloying additions near the surface of sputtering-deposited Al-1.3 at.%Cu, Al-2.7 at.%Cu and Al-30 at.%Cu alloys is investigated following immersion in nitric acid, which is used commercially as a de-smutting pre-treatment. Corrosion of the alloys is revealed at rates in the range 4-13 nm min-1, leading to enrichment of copper in the alloy surface regions. Enrichments are also generated by nitric acid treatment of AA2024-T3 and AA7075-T6 alloys, with levels similar to those achieved by etching in sodium hydroxide solution. Conventional durations of de-smutting treatments in nitric acid have minor influences on the magnitude of enrichment. © 2008 Elsevier Ltd. All rights reserved.
URI http://hdl.handle.net/10261/87810
DOI10.1016/j.electacta.2008.01.026
Identificadoresdoi: 10.1016/j.electacta.2008.01.026
issn: 0013-4686
Aparece en las colecciones: (CENIM) Artículos
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