Corrosion Resistance of Electrodeposited Layers using a Zn-Ni Electrolyte Impregnated with Tri-, Tetra-, and Pentavalent Elements

摘要

This paper describes the obtaining of an electrodeposited composite layer by enriching the Zn-Ni alkaline electrolyte with tri-, tetra- and pentavalent elements. The aim was to obtain a system of oxides of type n and p on the surface of a sample, after exposing to a corrosive environment that would block the electric charge transport. Measurements of the open-circuit potential, potentiodynamic polarization and the electrochemical impedance spectrum, shown that for a certain proportion of the enriching elements, the corrosion current is much lowered.