Effect of pH and Stirring on the Electrodeposition Behavior of Zn-Fe Alloys from Sulfate Solutions

Abstract

Zn-Fe alloys were electrodeposited from sulfate solutions under galvanostatic conditions (0.01-250A/dm²) to investigate the effects of pH and stirring of the solution on the deposition behavior of the alloys. With a decrease in pH, the current density-alloy composition curve was shifted to higher current density region while the current efficiency of the alloys decreased over a wide range of current densities. Stirring of the solutions shifted the curves of both the current density-alloy composition and the current density-current efficiency to higher current density region. These phenomena are explained by considering the change in polarization curves for the alloy deposition by the effects of variation of pH and stirring.