Nb Electrodissolution in Acid Fluoride Medium : steady state and impedance investigations. - Sorbonne Université
Journal Articles Journal of The Electrochemical Society Year : 2002

Nb Electrodissolution in Acid Fluoride Medium : steady state and impedance investigations.

Abstract

The electrochemical behavior of Nb in acid fluoride media has been investigated by voltammetric, steady-state, and impedance techniques as a function of variables like (the total fluoride concentration, varied between 0 and 2 M), pH (0-7), and potential (−1 to 7 V vs. SCE). An active/passive transition is observed, followed by a wide current pseudoplateau where current depends on and pH in a way indicating that HF and related species dissolve the passivating oxide whereas is inactive. Impedance diagrams obtained on this plateau can be reproduced by a literature model (surface charge approach), and the derived parameters may be used to calculate structural and kinetic quantities, as well as the formation ratio of the surface oxide.
No file

Dates and versions

hal-04227848 , version 1 (04-10-2023)

Identifiers

Cite

Sandro Cattarin, Marco Musiani, Bernard Tribollet. Nb Electrodissolution in Acid Fluoride Medium : steady state and impedance investigations.. Journal of The Electrochemical Society, 2002, 149 (10), pp.B457. ⟨10.1149/1.1502690⟩. ⟨hal-04227848⟩
9 View
0 Download

Altmetric

Share

More