Publication:
Atomic-scale investigations of passive film formation on Ti-Nb alloys

Thumbnail Image
Identifiers
URI: https://hdl.handle.net/10016/36347
ISSN: 0169-4332
DOI: https://doi.org/10.1016/j.apsusc.2022.156282
UXXI: AR/0000031676
Files
Atomic-scale_ASS_2023_ps.pdf (3.01 MB)
Publication date
2023-04-01
Defense date
Authors
Advisors
Tutors
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier
Impact
Google Scholar
Export
Research Projects
Organizational Units
Journal Issue
Abstract
This study extensively investigates the passive film formation mechanisms on Ti-xNb alloys by using several electrochemical techniques, including electrochemical impedance spectroscopy (EIS) before and after potentiostatic polarization at the passive zone, and Mott-Schottky (MS) measurements in 9 g/l NaCl electrolyte at 37 °C, together with X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) analysis. Overall, the Ti40Nb presented lower corrosion resistance due to a thinner passive film as compared to commercial pure Ti (grade 2) and Ti12Nb. The passive film formed on Ti12Nb and Ti40Nb alloys at a steady-state condition (+0.5 VAg/AgCl for 60 min) is composed of amorphous phases of TiO, Ti2O3, TiO2, Nb2O5, and crystalline phases of TiO2 (anatase) and Nb2O5.
Description
Keywords
Passive film, Corrosion, Ti-Nb alloys, EIS, XPS, TEM
Bibliographic citation
Çaha, I., Alves, A. C., Chirico, C., Maria Pinto, A., Tsipas, S., Gordo, E., Bondarchuk, O., Leonard Deepak, F. & Toptan, F. (2023). Atomic–scale investigations of passive film formation on Ti-Nb alloys. Applied Surface Science, 615, 156282.
Collections
DCIMIQ - CIMIQ - TP - Artículos de Revistas
ITQMAAB - Artículos de Revistas