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The formation of a hydrotalcite coating on the aluminium alloy 6060 using a spray system

Published online by Cambridge University Press:  02 January 2018

Lingli Zhou ,
Henrik Friis ,
Melanie Roefzaad ,
Kasper Bondo Hansen ,
Sara Eisenhardt ,
Asger Andersen  and
Nikolaj Zangenberg
Lingli Zhou*
Affiliation:
Department of Geoscience, Aarhus University, Høegh-Guldbergs Gade 2, DK-8000 Aarhus C, Denmark Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, 19 Beituchen Western Road, Chaoyang District, Beijing 100029, China
Henrik Friis
Affiliation:
Department of Geoscience, Aarhus University, Høegh-Guldbergs Gade 2, DK-8000 Aarhus C, Denmark
Melanie Roefzaad
Affiliation:
Siemens Corporate Technology, Borupvang 9, 2750 Ballerup, Denmark
Kasper Bondo Hansen
Affiliation:
Siemens Corporate Technology, Borupvang 9, 2750 Ballerup, Denmark
Sara Eisenhardt
Affiliation:
Siemens Corporate Technology, Borupvang 9, 2750 Ballerup, Denmark
Asger Andersen
Affiliation:
Siemens Corporate Technology, Borupvang 9, 2750 Ballerup, Denmark
Nikolaj Zangenberg
Affiliation:
Danish Technological Institute, Kongsvang Allé 29, 8000 Aarhus C, Denmark
*
*Email: lingli.zhou@geo.au.dk
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Abstract

Coatings with the composition of Li-Al-NO3 hydrotalcite were formed on the Al alloy 6060 using a spray system. The coatings consist of crystals with a typical hydrotalcite structure. Dense, uniform and blade-like flakes cover completely the surface of the Al substrate. The coatings display a multi-layer structure with average thickness of ∼1000 nm. The hydrotalcite-coated samples performed better than those without coatings in salt-spray and filiform-corrosion tests, and further treatment involving sealing with a Mg acetate solution and dipping in a H2O2 + Ce-based solution improved the corrosion resistance ability.

Keywords

Al alloy 6060hydrotalcitecoatingspray system
Type
Research Article
Information
Clay Minerals , Volume 50 , Issue 5 , December 2015 , pp. 583 - 592
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2015

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