ABSTRACT
The potentio-dynamic anodic polarization of silver exhibit different peaks at different potentials depending on the selectrolyte used. In neutral sulfate solutions the major process is the Ag2O formation, while in presence of NaNO3, as an oxidizing agent, a peak which may represent the AgO formation appears at a later more anodic potential. The two peaks can be found together depending on the ambient concentration of both Na2SO4 and NaNO3. The presence of Cl- ions, either as HCl or NaCl, causes the rise of current at approximate 0.1 V which increases with increase of Cl- concentration independent of pH. This study showed that the early stages of growth occur by two- dimensional surface process on the Ag electrode forming a porous lager of AgCl giving a chance for nucleation of three-dimensional phase. The presence of NaNO3 with chloride solutions causes the appearance of the peak representing AgO formation