Double Step Electrochemical Process for the Deposition of Superhydrophobic Coatings for Enhanced Corrosion Resistance
Francesco Di Franco, Andrea Zaffora, Paola Vassallo, Monica Santamaria
Abstract
Superhydrophobic surface on anodized AA5083 sample was obtained by an electrochemical process. Scanning Electron Microscopy and Fourier Transform Infrared Spectroscopy analyses revealed the hierarchical structure of the coating and the presence of manganese stearate. These features were crucial for the coating superhydrophobicity, demonstrated by a measured contact angle of ∼163° and its self-cleaning ability. Electrochemical characterization in an aqueous solution mimicking seawater proved an enhanced corrosion resistance due to the superhydrophobic coating with respect to anodized AA5083 sample that also lasted after 20 immersion days in Cl − containing electrolyte.
Topics & Concepts
AnodizingMaterials scienceCorrosionContact angleCoatingScanning electron microscopeChemical engineeringElectrochemistryFourier transform infrared spectroscopyDielectric spectroscopyElectrolyteAqueous solutionSuperhydrophobic coatingDeposition (geology)MetallurgyComposite materialChemistryElectrodeAluminiumSedimentEngineeringPhysical chemistryBiologyPaleontologyAnodic Oxide Films and NanostructuresSurface Modification and SuperhydrophobicityCorrosion Behavior and Inhibition