Electrochemical Properties of Ternary Amorphous Alloys Based on Iron and Cobalt in Alkali Solutions

Abstract

We study the electrochemical behavior of Fe80Si6B14, Co72Si18B10, and Fe84Nb2B14 amorphous metal alloys based on Fe and Сo in alkali solutions of different concentrations. The protective oxide layers on Fe80Si6B14 electrodes have lower degrees of corrosion protection than for the Co72Si18B10 electrodes. Niobium clusters in the Fe84Nb2B14 alloy are reactive, which results in the rapid initial interaction of the electrode with a 1 М aqueous solution of KОН, which is retarded under the conditions of long-term contact with ions of the electrolyte. The Fe80Si6B14 and Fe84Nb2B14 alloys are characterized by a similar electrochemical behavior in 1 M and 5 М aqueous solution of KOH under the conditions of cyclic polarization of samples in corrosive media. As a result of fivefold scanning of the potential, it is shown that the electrochemical properties of the electrodes made of amorphous metallic alloys depend on the electrolyte concentration.