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A short review on the applications of the superhydrophobic coatings on metals

Brassard Jean-Denis, Perron Jean et Sarkar Dilip K.. (2016). A short review on the applications of the superhydrophobic coatings on metals. Dans : 28th International Mineral Processing Congress, IMPC 2016 , 11-15 September 2016, Quebec City Convention CenterQuebec City.

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Résumé

Nearly perfect spherical shaped water drops rolling-off from the surface of lotus leaf is one of the beauties of nature. This kind of surface is called superhydrophobic, since the water does not like it. Physically, a superhydrophobic surface provides a contact angle (CA) of water over 150°. The combinations of both mico-nanostructure topography as well as low surface energy are essential to have such high CA on a surface. Nano-micro structured superhydrophobic surfaces have been developed in different methods. (i) Monodispersed fluorinated silica nanoparticles have been synthetized via Stöber Sol-Gel process and deposited on various surfaces, such as aluminium or glass, to obtain transparent superhydrophobic thin films. (ii) Similarly, zinc stearate nanocomposite coating has been fabricated by spray process on the same substrates. These thin films are found mechanically robust with drag reduction of coefficient 16% lower than as-received surfaces. (iii) By electrodepositing pure zinc on steel surfaces and further coating it with diluted room-temperature vulcanized silicone rubber, the surface become superhydrophobic. This superhydrophobic surface protects the steel against corrosion by increasing the polarization resistance from 1.5 kΩ on steel to 44.4 kΩ. This coating also reduced the ice adhesion on the steel surface 6.3 times as compared to bare steel substrates. Globally, these superhydrophobic surfaces have tremendous applications against corrosion reductions, drag reductions and ice adhesion reductions.

Type de document:Matériel de conférence (Non spécifié)
Date:Septembre 2016
Sujets:Sciences naturelles et génie > Génie
Sciences naturelles et génie > Génie > Génie des matériaux et génie métallurgique
Sciences naturelles et génie > Sciences appliquées
Département, module, service et unité de recherche:Départements et modules > Département des sciences appliquées > Module d'ingénierie
Unités de recherche > Centre international de recherche sur le givrage atmosphérique et l’ingénierie des réseaux électriques (CENGIVRE) > Laboratoire international des matériaux antigivres (LIMA)
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Mots-clés:composite, corrosion, drag, electrode position, icephobic, nanotechnology, sol-gel, superhydrophobic thin films, traînée, position d'électrode, icephobe, nanotechnologie, films minces superhydrophobes
Déposé le:21 juill. 2021 15:14
Dernière modification:21 juill. 2021 15:14
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