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

Abstract

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
Vol53
No5
Pages1825-1837
Keywords in EnglishA. Aluminium alloys, A. Complex metallic Alloys, B. Electrochemical polarization, B. ICP-MS, B. XPS, C. Passivity
DOIDOI:10.1016/j.corsci.2011.01.061
URL http://www.sciencedirect.com/science/article/pii/S0010938X11000849
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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