INFLUENCE OF COBALT ON THE OXYGEN DEPOLARIZATION AT PB AND PB-AG ALLOYING ANODES


HEIN K., DUMAN I. , TIMUR S.

METALL, vol.48, no.7, pp.532-537, 1994 (Journal Indexed in SCI) identifier

  • Publication Type: Article / Article
  • Volume: 48 Issue: 7
  • Publication Date: 1994
  • Title of Journal : METALL
  • Page Numbers: pp.532-537

Abstract

In this study lead and lead silver alloys are anodic polarized galvanostaticly for 20 h in Ca2+-containing electrolyte, so that Co(x)O(y) doped leaddioxide surface layers are produced. Afterwards these materials are investigated by anodic polarization in 200 g/l sulfuric acid solution under galvanostatic conditions. Then current density - potential - curves are measured, the Tafel-plots are calculated and compared with a lead anode, which is polarized without Ca2+-ions. The optimal conditions for a dense and mechanical strong doped oxide layer are established. The obtained anodes show potential of oxygen formation 120 m V lower than a lead anode. A summary of the effects of silver and cobalt is not detected.