engleski

Redox Reactions on Anodised or Passivated Metals

The simple redox reactions on anodised or passivated metal (Al, Fe, Zn) were investigated by the current-potential method. The redox systems were chosen so that the electrochemical reaction was practically under the control of the diffusion in the electrolyte in case of unhindered charge transfer in the solid phase and on the contact electrode/electrolyte. Measurements were performed in a wider potential range, but on the previously anodised or passivated metal, in which case the potential range investigated was within the limits corresponding to low equivalent corrosion currents for the pure supporting electrolyte. In all the investigated cases the phenomena were observed, showing that the electron structure of the solid phase and possible potential barriers of the metal/phase layer/solution system had a predominant influence.

redox reactions; passivated metals

nije evidentirano