Effect of Ce(III) and Ce(IV) ions on the structure and active protection of PMMA-silica coatings on AA7075 alloy

A. Trentin, S., V Harb, M. C. Uvida, K. Marcoen, S. H. Pulcinelli, C., V Santilli, H. Terryn, T. Hauffman, P. Hammer

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12 Citaten (Scopus)
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Samenvatting

This work investigates the effect of Ce(III) and Ce(IV) additives on the structure and anti-corrosion properties of poly(methyl methacrylate) (PMMA)-silica coatings on AA7075 aluminium alloy. The results revealed that intermediate Ce(IV) loadings (500 and 1000 ppm) result in a dense hybrid network with a less defective polymeric phase, extending the service time of AA7075 up to 835 days in 3.5% NaCl. Although both additives provide long-term protection, the self-healing ability was observed only for Ce(IV) addition, favoured by the formation of oxides/hydroxides at pH∼3. These properties make the 4 μm-thick PMMA-silica-Ce(IV) coatings very interesting for chromium-free protection technologies.

Originele taal-2English
Artikelnummer109581
TijdschriftCorrosion Science
Volume189
DOI's
StatusPublished - 15 aug 2021

Bibliografische nota

Funding Information:
The authors would like to acknowledge the financial support of Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) [grants 424133/2016-4 , 307905/2018-7 , 421081/2016-3 ], Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) - INCT National Institute of Science and Technology on Advanced Eco-Efficient Cement-Based Technologies [grants 14/50948-3 , 14/465593-3 , Finance Code 001 ], Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) [grants 2015/11907-2 , 2015/09342-7 , 2014/12182-9 ] and Research Foundation Flanders (FWO) funding agencies . We also thank the National Laboratory of Synchrotron Light Source (LNLS) for SAXS beamline access and the Hercules program under grant agreement ZW13_07 for Tof-SIMS measurements.

Publisher Copyright:
© 2021 Elsevier Ltd

Copyright:
Copyright 2021 Elsevier B.V., All rights reserved.

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