IRON DISSOLUTION UNDER MASS-TRANSPORT CONTROL - THE EFFECT OF VISCOSITY ON THE CURRENT OSCILLATION

The current oscillation normally seen at the beginning of the plateau of polarization curves was found to be influenced strongly by the solu tion viscosity. The role of viscosity for iron dissolution in sulphate solution was studied by polarization curves, ac and electrohydrodynam ical impedances. It was found that the charge and mass transport proce sses are not changed by the viscosity. However, when the glycerol was added to electrolyte the viscosity of the solution changes. So, the hy drodynamic conditions at the electrode surface. also change and conseq uently the oscillation processes can be eliminated.