abstract
Thin oxide films were prepared electrochemically on the aluminum surface using the high-voltage discharge and potentiostatic methods in deionized water as an electrolyte. The growth of continuous films occurred only at potentials lower than the breakdown potential. The films obtained by the discharge method are more uniform and can grow to a higher thickness in comparison to those formed by the potentiostatic mode, as demonstrated by electrochemical impedance spectroscopy (EIS), transmission electron microscopy (TEM), and scanning Kelvin probe force microscopy (SKPFM). The data herein obtained can be used as a reference to understand better the properties of the films produced in conventional electrolytes where apart from water other species are present. (C) The Author(s) 2016. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives 4.0 License (CC BY-NC-ND, http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is not changed in any way and is properly cited. For permission for commercial reuse, please email: oa@electrochem.org. All rights reserved.
keywords
OXIDE-FILMS; PULSED DISCHARGE; OXIDATION; BEHAVIOR; CAPACITANCE; THICKNESS; TITANIUM; ALLOY
subject category
Electrochemistry; Materials Science
authors
Lisenkov, AD; Poznyak, SK; Zheludkevich, ML; Ferreira, MGS
our authors
Aleksey Lisenkov
Researcher
Mário Guerreiro Silva Ferreira
Retired Professor
Mikhail Zheludkevich
Invited Principal Researcheracknowledgements
Financial support of FCT grants PTDC/CTM/72223/2006 and SFRH/BD/78628/2011 are gratefully acknowledged.