Title :

Improvement of wear and corrosion protection of PEO on AA2024 via sol-gel sealing

Author(s) :

Sopchenski, Luciane [Auteur]
Université de Mons / University of Mons [UMONS]
Robert, Julien [Auteur]
Laboratoire des Matériaux Céramiques et Procédés Associés - EA 2443 [LMCPA]
Touzin, Matthieu [Auteur]
Unité Matériaux et Transformations - UMR 8207 [UMET]
Tricoteaux, Arnaud [Auteur]
Laboratoire des Matériaux Céramiques et Procédés Associés - EA 2443 [LMCPA]
Olivier, Marie-Georges [Auteur]
Université de Mons / University of Mons [UMONS]

Journal title :

Surface and Coatings Technology

Volume number :

417

Pages :

127195

Publisher :

Elsevier BV

Publication date :

2021-04-21

ISSN :

0257-8972

English keyword(s) :

Plasma electrolytic oxidation
Sol-gel
Aluminum
EIS
Wear

HAL domain(s) :

Chimie/Matériaux
Physique [physics]/Matière Condensée [cond-mat]/Science des matériaux [cond-mat.mtrl-sci]

English abstract : [en]

Plasma electrolytic oxidation (PEO) is a versatile and cost-effective technique to obtain protective oxide coatings in light metals, although its intrinsic porosity is a drawback for long-term corrosion resistance. Sol-gel ...
Show more >Plasma electrolytic oxidation (PEO) is a versatile and cost-effective technique to obtain protective oxide coatings in light metals, although its intrinsic porosity is a drawback for long-term corrosion resistance. Sol-gel layers are pointed as a useful tool to seal PEO porosity and increase its corrosion resistance, although little is known about its influence on the wear performance of PEO coatings. In this study, a PEO coating obtained on AA2024 was sealed with a hybrid sol-gel via dip-coating. Two withdrawal speeds were set in order to investigate the influence of the sol-gel filling in its sealing ability. Both sol-gel application conditions were able to fill the PEO pores and microcracks and change its wettability. EIS results showed samples sealed with sol-gel maintained the protective behavior upon 28 days and increased the resistance of the system by several orders of magnitude in comparison to unsealed PEO coatings. Pin-on-disk tests indicate the sol-gel decrease the shear stresses of the coating, decreasing its wear rate in 40% compared to the unsealed PEO.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Administrative institution(s) :

Université de Lille
CNRS
INRA
ENSCL

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Research team(s) :

Métallurgie Physique et Génie des Matériaux

Submission date :

2021-04-27T11:34:48Z
2021-05-06T15:44:29Z