title: Effect of anodization on the surface characteristics and electrochemical behaviour of zirconium in artificial saliva.
abstract: The paper is focused on elaboration of ZrO2 films on pure zirconium via anodizing in phosphoric acid with and without fluoride at constant potentials of 30 V and 60 V. The structure and composition of the films were investigated using scanning electronic microscopy, Raman spectroscopy and X-ray photoelectron spectroscopy. The composition of the oxides formed at both potentials can be identified as monoclinic ZrO2. In addition to Zr and O, the layers formed in phosphoric acid contain phosphorus originating from the phosphoric acid. When the phosphoric acid solution contains NaF, fluorine is also incorporated into the oxide layer. The oxides formed at a higher voltage have greater roughness than those formed at 30 V. Anodized samples exhibit smaller current densities during anodic polarization compared to the as-received zirconium covered with native oxide.
authors.affiliation: Faculty of Applied Chemistry and Materials Science, Department of General Chemistry, 1-7 Polizu, district 1, Bucharest Ro-011061, Romania.
authors.forename: Daniela E
authors.initials: DE
authors.lastname: Romonti
authors.affiliation: INTEMA, CONICET, Universidad Nacional de Mar del Plata, Juan B. Justo, 4302, B7608FDQ Mar del Plata, Argentina.
authors.forename: Andrea V
authors.initials: AV
authors.lastname: Gomez Sanchez
authors.affiliation: Jožef Stefan Institute, Department of Physical and Organic Chemistry, Jamova c. 39, SI-1000 Ljubljana, Slovenia.
authors.forename: Ingrid
authors.initials: I
authors.lastname: Milošev
authors.affiliation: Faculty of Applied Chemistry and Materials Science, Department of General Chemistry, 1-7 Polizu, district 1, Bucharest Ro-011061, Romania.
authors.forename: Ioana
authors.initials: I
authors.lastname: Demetrescu
authors.affiliation: INTEMA, CONICET, Universidad Nacional de Mar del Plata, Juan B. Justo, 4302, B7608FDQ Mar del Plata, Argentina. Electronic address: smcere@fi.mdp.edu.ar.
authors.forename: Silvia
authors.initials: S
authors.lastname: Ceré
mesh_terms: D055664:Electrochemical Techniques; D012464:Saliva, Artificial / Q000737:chemistry*; D013499:Surface Properties; D015040:Zirconium / Q000737:chemistry*
chemical_list: D012464:Saliva, Artificial; D015040:Zirconium; C028541:zirconium oxide
keywords: Anodized zirconium; Corrosion resistance; Fluoride; XPS