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

Author(s):Show less -

Ramirez, O. M. Prada ; Kremmer, T. M. ; Marin, J. H. ; da Silva, B. P. ; Starykevich, M. ; Tunes, M. A. ; Ferreira, M. G. S. ; Aoki, I. V. ; Ando, R. A. ; Pogatscher, S. ; de Melo, H. G.

• Document type: Journal article
• Source: Corrosion Science; v. 221, p. 21-pg., 2023-08-15.

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. (AU)

• FAPESP's process: 18/01096-5 - Corrosion study of the alloy AA2024-T3 anodized in TSA and protected with Ce ions and an hybrid sol-gel coating
• Grantee: Hercílio Gomes de Melo
• Support Opportunities: Regular Research Grants