Ce nanoparticles and sol-gel hybrid organic-inorganic coatings maximize corrosion protection in the anodized AA2024-T3

Oscar Mauricio Prada Ramirez, Thomas Kremmer, J. H. Marin, B. P. da Silva, Maksim Starykevich, Matheus Tunes, Mário G.S. Ferreira, I. V. Aoki, R. A. Ando, Stefan Pogatscher, Hercílio Gomes de Melo

Publikation: Beitrag in FachzeitschriftArtikelForschungBegutachtung


We demonstrate that the corrosion resistance of the AA2024-T3 alloy can be maximized with the application of top protective sol-gel hybrid organic-inorganic coatings. Samples combining Ce nanoparticles within the pores of the anodic layer with the top sol-gel coatings were observed to outperform samples featuring only the coating. This research unravels the self-healing capability against corrosion of the sol-gel coating when Ce nanoparticles are present, as well as a good coverage of defective regions within the oxide by the hybrid layer. This research opens a paradigm aiming at maximizing the corrosion resistance for non-ferrous anodized alloys.
FachzeitschriftCorrosion science
Ausgabenummer15 August
Frühes Online-Datum14 Juni 2023
PublikationsstatusVeröffentlicht - 15 Aug. 2023

Bibliographische Notiz

Funding Information:
HG de Melo thanks the Sao Paulo Research Foundation - Brazil ( FAPESP ) Proc. 2018/01096-5 and the National Council for Scientific and Technological Development - Brazil ( CNPq ) Proc. 400895/2014-5 for the financial support to the project. O.M. Prada Ramirez thanks the Coordination for the Improvement of Higher Education Personnel - Brazil ( CAPES ) Proc. 88887.388129/2019-00 and 88887.716342/2022-00 . B. P. da Silva and I.V. Aoki would like to thank the CNPq – National Council for Scientific and Technological Development - Brazil for the scholarships (grants # 140187/2017-0 and 310504/2020-1 ). This study was financed in part by the Coordination for the Improvement of Higher Education Personnel - Brasil (CAPES) - Finance code 001. M. Starykevich and M.G.S. Ferreira acknowledge the project CICECO-Aveiro Institute of Materials, UIDB/50011/2020, UIDP/50011/2020 & LA/P/0006/2020 , financed by national funds through the FCT/MEC (PIDDAC). M.A. Tunes acknowledges the support from the Laboratory Directed Research and Development program established at the Los Alamos National Laboratory under project number 202000689PRD2. The transmission electron microscopy facility used in this work received funding from the Austrian Research Promotion Agency ( FFG ), project known as “ 3DnanoAnalytics ” under contract number FFG-No. 858040 .

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