Keywords :
AA2024-T3; AA2198-T851; Corrosion; Plasma electrolytic oxidation; Sol-gel sealing; Wear; Aa2198-t851; Electrochemicals; Oxidation process; Plasma electrolytic oxidation coatings; Post treatment; Sol'gel; Sol-gel coatings; Chemistry (all); Condensed Matter Physics; Surfaces and Interfaces; Surfaces, Coatings and Films; Materials Chemistry
Abstract :
[en] In consideration of the intrinsic porosity in layers generated via the plasma electrolytic oxidation (PEO) process, sol-gel coatings have gained a lot of attention for their environmentally friendly and robust protective qualities when applied as a post-treatment. The sealing capabilities of the sol-gel layer were scrutinized for the PEO coating applied on AA2024-T3 and AA2198-T851 aluminum alloys. Electrochemical Impedance Spectroscopy (EIS) and Field Emission Scanning Electron Microscopy (FE-SEM) confirmed that for the same operating conditions, the morphological properties of the PEO coating depend on the substrate nature and play a key role in the corrosion protection given by such duplex coatings. Furthermore, the findings indicated that the use of a sol-gel enhances the wear resistance compared to the blank substrates and the PEO coatings.
Name of the research project :
4573 - SEALCERA - Corrosion and tribocorrosion performance of sealed ceramic coatings obtained by plasma electrolytic oxidation - Fédération Wallonie Bruxelles
Funding text :
The authors would like to warmly acknowledge CNPq for the financial support for this project (CNPq Proc 406871/2021-3), for the grant awarded to Rafael E. Klumpp (CNPq Proc 200257/2022-6) and the F\u00E9d\u00E9ration Wallonie-Bruxelles (Actions de Recherche Concert\u00E9es ARC SEALCERA \u2013 Grant of Sajjad Akbarzadeh).
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