title: Surface Charge at the Oxide/Electrolyte Interface: Toward Optimization of Electrolyte Composition for Treatment of Aluminum and Magnesium by Plasma Electrolytic Oxidation.
abstract: Controlling microdischarges in plasma electrolytic oxidation is of great importance in order to optimize coating quality. The present study highlights the relationship between the polarity at which breakdown occurs and the electrolyte pH as compared with the isoelectric point (IEP). It is found that working at a pH higher than the IEP of the grown oxide prevents the buildup of detrimental cathodic discharges. The addition of phosphates results in a shift in the IEP to a lower value and therefore promotes anodic discharges at the expense of cathodic ones.
authors.affiliation: Institut Jean Lamour, UMR 7198 CNRS, Université de Lorraine , Parc de Saurupt, 54011 Nancy, France.|Department of Physical Sciences, The Open University , Walton Hall, Buckinghamshire MK76AA, United Kingdom.
authors.forename: Alexandre
authors.initials: A
authors.lastname: Nominé
authors.affiliation: Institut Jean Lamour, UMR 7198 CNRS, Université de Lorraine , Parc de Saurupt, 54011 Nancy, France.
authors.forename: Julien
authors.initials: J
authors.lastname: Martin
authors.affiliation: Institut Jean Lamour, UMR 7198 CNRS, Université de Lorraine , Parc de Saurupt, 54011 Nancy, France.
authors.forename: Cédric
authors.initials: C
authors.lastname: Noël
authors.affiliation: Institut Jean Lamour, UMR 7198 CNRS, Université de Lorraine , Parc de Saurupt, 54011 Nancy, France.
authors.forename: Gérard
authors.initials: G
authors.lastname: Henrion
authors.affiliation: Institut Jean Lamour, UMR 7198 CNRS, Université de Lorraine , Parc de Saurupt, 54011 Nancy, France.
authors.forename: Thierry
authors.initials: T
authors.lastname: Belmonte
authors.affiliation: National University of Science and Technology "MIS&S" , 4, Leninsky Prospekt, 119049, Moscow, Russia.
authors.forename: Ilya V
authors.initials: IV
authors.lastname: Bardin
authors.affiliation: Institute of Plasma Physics, Academy of Sciences of the Czech Republic , v.v.i. Za Slovankou 3, Prague 182 00, Czech Republic.
authors.forename: Petr
authors.initials: P
authors.lastname: Lukeš