Author(s): Lucia Gregorio-Vázquez | Cecilia Cuevas-Arteaga | Grecia Hernández | Ebelia del Ángel-Meraz
Journal: Avances en Ciencias e Ingeniería
ISSN 0718-8706
Volume: 4;
Issue: 1;
Start page: 85;
Date: 2013;
Original page
Keywords: TiO2 nanostructures | corrosion | titanium oxide | electrochemical anodization
ABSTRACT
It is reported the formation of porous TiO2 nanostructures on titanium foils by exposing the titanium in different aqueous solutions of hydrofluoric acid (HF), using the electrochemical anodization technique at low potential (3V) and room temperature. The polarization curves show evidence of the possible occurrence of TiO2 nanostructures due to the decrease in corrosion current density for the formation of a passive film of a planar oxide, and a limit current. It was determined that anodization times decrease with the concentration of HF in the corrosive solution, resulting a heterogonous porosity, which pore size is between 300 nm and 2 µm. Anodization electrochemical curves were atypical with respect to those reported at high voltages, where an increment in current density by the effect of the breaking of the passive film was not presented; therefore, the pore depth was poor.
Journal: Avances en Ciencias e Ingeniería
ISSN 0718-8706
Volume: 4;
Issue: 1;
Start page: 85;
Date: 2013;
Original page
Keywords: TiO2 nanostructures | corrosion | titanium oxide | electrochemical anodization
ABSTRACT
It is reported the formation of porous TiO2 nanostructures on titanium foils by exposing the titanium in different aqueous solutions of hydrofluoric acid (HF), using the electrochemical anodization technique at low potential (3V) and room temperature. The polarization curves show evidence of the possible occurrence of TiO2 nanostructures due to the decrease in corrosion current density for the formation of a passive film of a planar oxide, and a limit current. It was determined that anodization times decrease with the concentration of HF in the corrosive solution, resulting a heterogonous porosity, which pore size is between 300 nm and 2 µm. Anodization electrochemical curves were atypical with respect to those reported at high voltages, where an increment in current density by the effect of the breaking of the passive film was not presented; therefore, the pore depth was poor.
