Corrosion performance of powder-coated aluminum profiles with increased trace element content

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Abstract

In this work, the corrosion susceptibility of powder coated Al6060 alloys with increasing Cu and Zn content is evaluated in a benchmark test. Although higher Cu and Zn limits would enable the industry to increase the use of end-of-life scrap and thus produce eco-friendlier aluminium profiles, such alloys are often disregarded due to concerns of corrosion, especially filiform corrosion. Our results suggest that this concern is ungrounded as long as typical quality specifications for the pre-treatment and coating process are followed and the alloy composition is kept within the limits of the European norm AW6060. Furthermore, we point out that the variation of the results due to processing at different coating production lines is larger than the difference between alloys of different Cu and Zn contents.
Original languageEnglish
Pages (from-to)1575-1585
Number of pages11
JournalMaterials and Corrosion-Werkstoffe und Korrosion
Volume73
Issue number10
DOIs
Publication statusPublished - 4 May 2022

Bibliographical note

Funding Information:
The authors acknowledge the input of the members of the ESTAL working group of secondary aluminum and ESTAL for bringing together industrial key players. The authors would like to thank Stig Tjøtta from Hydro aluminum for his valuable comments on the manuscript. The authors also acknowledge EMAX for their contribution and for providing the samples. Alexander Lutz acknowledges VLAIO for financial contribution in form of the RECYCAL 2 (HBC.2017.0300) and RECYCAL 3 grants (HBC.2020.2726).

Funding Information:
The authors acknowledge the input of the members of the ESTAL working group of secondary aluminum and ESTAL for bringing together industrial key players. The authors would like to thank Stig Tjøtta from Hydro aluminum for his valuable comments on the manuscript. The authors also acknowledge EMAX for their contribution and for providing the samples. Alexander Lutz acknowledges VLAIO for financial contribution in form of the RECYCAL 2 (HBC.2017.0300) and RECYCAL 3 grants (HBC.2020.2726).

Publisher Copyright:
© 2022 Wiley-VCH GmbH.

Copyright:
Copyright 2022 Elsevier B.V., All rights reserved.

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