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

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abstract

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.

keywords

2024-T3 ALUMINUM-ALLOY; TARTARIC-SULFURIC ACID; HEXAVALENT CHROMIUM; LOCALIZED CORROSION; CONVERSION LAYERS; FILM FORMATION; SILICA SOL; OXIDE; RESISTANCE; BEHAVIOR

subject category

Materials Science; Metallurgy & Metallurgical Engineering

authors

Ramirez, OMP; Kremmer, TM; Marin, JH; da Silva, BP; Starykevich, M; Tunes, MA; Ferreira, MGS; Aoki, IV; Ando, RA; Pogatscher, S; de Melo, HG

Groups

Projects

Collaboratory for Emerging Technologies, CoLab (EMERGING TECHNOLOGIES)

CICECO - Aveiro Institute of Materials (UIDB/50011/2020)

CICECO - Aveiro Institute of Materials (UIDP/50011/2020)

Associated Laboratory CICECO-Aveiro Institute of Materials (LA/P/0006/2020)

acknowledgements

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 & amp; 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 Labora- tory 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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Publication Details

type
Journal Article
year
2023
journal
CORROSION SCIENCE
volume
221
article number
111330
publisher
PERGAMON-ELSEVIER SCIENCE LTD
issn
0010-938X
digital object identifier
10.1016/j.corsci.2023.111330
web of science article identifier
WOS:001054974200001

Journal Metrics (JCR 2019)

Journal Impact Factor
6.479
Journal Impact Factor (5 yrs)
6.894
category normalized journal percentile
89.262

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