Electrochemical properties of aqueous solutions of polyelectrolytes - copolymers of acrylic or methacrylic acid and acryl- or methacrylamide were examined. Proper ties, such as: equivalic conductance, limit viscosity number, rate and degree of molecule association, as well as the values of polimerization and anodic potential were determined. Behavior of polyelectrolytes during electrophoresis at various tension of current was tested. The optimum conditions of formation of -potentially protective - polymer layer on the electrode were determined.