Encyclopedie de la recherche sur l'aluminium au Quebec - Edition 2014 | Seite 70

68

TRANSFORMATION ET APPLICATIONS // TRANSFORMATION AND APPLICATIONS
Corrosion resistant superhydrophobic

nanoparticles-incorporated-anodized

SURFACES D'ALLIAGES D'ALUMINIUM SUPERHYDROPHOBES ANODISÉES
aluminum alloys surfaces
AVEC NANOPARTICULES INCORPORÉES RÉSISTANTES À LA CORROSION

Surfaces d'alliages d'aluminium superhydrophobes

CORROSION RESISTANT SUPERHYDROPHOBIC NANOPARTICLES- incorporées
anodisées avec nanoparticules
INCORPORATED-ANODIZED ALUMINUM ALLOYS SURFACES
résistant à la corrosion
Y. Huang, D. K. Sarkar and X.-Grant Chen
Centre Universitaire de Recherche sur l’Aluminium (CURAL)
Université du Québec à Chicoutimi
555 Boulevard de l'Université, Chicoutimi,Québec, Canada G7H 2B1,
([e-mail])

Applications and objectives

Introduction
What is a superhydrophobic surface?

Corrosion
resistance

 Surface exhibits nearly zero wetting.
How to make a superhydrophobic surface?
Make micro-nanorough patterns on the surface:
Enlarge the amount of air entrapment
Cover them with low surface energy waxy coating:
Weaken interaction between surface and water
Young equation
γ LV

Wenzel model

AA6061 aluminum alloy surface was modified to be
superhydrophobic for corrosion resistance, by stearic acid (SA)functionalized ZnO film electrophoretic deposited (EPD) on the
alloy surface. In order to enhance the mechanical property,
anodized aluminum alloy was prepared, which has a better
Glass
mechanical property but less corrosion resistance than
superhydrophobic surfaces. Therefore, an incorporation of
anodization and EPD was performed in our study, for both
Wiperless adhesion and corrosion resistance properties. That is, the alu