Journal of Applied Electrochemistry

, Volume 21, Issue 11, pp 1023–1026

Anodization of niobium in sulphuric acid media

  • M. A. Biason Gomes
  • S. Onofre
  • S. Juanto
  • L. O. de S. Bulhões
Papers

Abstract

Niobium oxide films of different thicknesses can be produced on niobium electrodes by anodic polarization. The films produced by a galvanostatic method show different interference colours following the expected theoretical succession of colours. An electrical breakdown was observed which showed a significant dependence of the electrolyte concentration and current density. The relationship between the colour and the current density during the anodization of niobium samples are reported for sulphuric acid solutions. In addition the method for preliminary surface preparation of the niobium electrode is described.

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Copyright information

© Chapman & Hall 1991

Authors and Affiliations

  • M. A. Biason Gomes
    • 1
  • S. Onofre
    • 1
  • S. Juanto
    • 1
  • L. O. de S. Bulhões
    • 1
  1. 1.Laboratório Interdisciplinar de Electroquímica e Cerâmica, Departamento de QuimicaUniversidade Federal de São CarlosSão CarlosBrasil
  2. 2.Instituto de Investigaciones Fisicoquimicas Teoricas y Aplicadas (INIFTA)La PlataArgentina

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