Passivation of Al–Cr–Fe and Al–Cu–Fe–Cr complex metallic alloys in 1 M H2SO4 and 1 M NaOH solutions

Ewa Ura-Bińczyk , Nadzeya Homazava , Andrea Ulrich , Roland Hauert , Małgorzata Lewandowska , Krzysztof Kurzydłowski , Patrik Schmutz


The corrosion mechanisms of Al–Cr–Fe and Al–Cu–Fe–Cr complex metallic alloys have been investigated by potentiodynamic and potentiostatic polarization. Very good passivation of the Al–Cr–Fe surface is exhibited from 1 M H2SO4 to 1 M NaOH solutions, which was confirmed by ICP-OES analysis over a period of 273 days. Potentiostatically formed passive films analysed by XPS revealed chromium enrichment in the outermost layer of the aluminium oxy-hydroxide film. Although Al–Cu–Fe–Cr showed passivation during potentiodynamic polarization, heavy active corrosion at OCP was revealed by ICP-OES. For the Al–Cu–Fe–Cr alloy, the 10\% content of Cr is insufficient to maintain a protective “chemically stable” Cr oxide/hydroxide.
Author Ewa Ura-Bińczyk ZPM
Ewa Ura-Bińczyk,,
- Division of Materials Design
, Nadzeya Homazava
Nadzeya Homazava,,
, Andrea Ulrich
Andrea Ulrich,,
, Roland Hauert
Roland Hauert,,
, Małgorzata Lewandowska ZPM
Małgorzata Lewandowska,,
- Division of Materials Design
, Krzysztof Kurzydłowski ZPM
Krzysztof Kurzydłowski,,
- Division of Materials Design
, Patrik Schmutz
Patrik Schmutz,,
Journal seriesCorrosion Science, ISSN 0010-938X
Issue year2011
Keywords in EnglishA. Aluminium alloys, A. Complex metallic Alloys, B. Electrochemical polarization, B. ICP-MS, B. XPS, C. Passivity
Score (nominal)45
Publication indicators WoS Impact Factor [Impact Factor WoS]: 2011 = 3.734 (2) - 2011=3.729 (5)
Citation count*15 (2015-04-27)
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