An Effect of Nickel Additives on Anode Behavior of Zinc-Aluminum Alloys Zn5Al, Zn55Al in NaCl Electrolyte

Abstract

The results of studying the anodic behavior of Zn5Al, Zn55Al alloys doped with nickel in a NaCl electrolyte are presented. It was found that nickel additives in an amount of 0.01-0.5 wt % contribute to a decrease in the anodic corrosion rate of the initial Zn5Al and Zn55Al alloys by approximately 15-20%. It is shown that alloying the initial alloys with nickel shifts the potentials of free corrosion, pitting and repassivation to the positive region. The proposed compositions of zinc-aluminum alloys containing nickel can be used as an anode coating for corrosion protection of metal structures for various purposes, including steel structures and structures.