Abstract

The alloy electrodeposit of zinc with iron alloy on mild steel under various current density ranges from 1.0A/dm2 to 5.0A/dm² using acetate electrolytic bath. The composition of the iron and corrosion resistance of the alloy electrodeposit was influenced by current densities. The corrosion rate of the Zn-Fe alloy deposit was observed using potentiodynamic Tafel polarization, Electrochemical Impedance Spectroscopy (EIS) in 3.5% NaCl solution at room temperature. It confirms that the Zn-Fe alloy deposit obtained at optimized current density 4.0A/dm² shown the lowest corrosion rate value 9.42mpy. The plate-like morphology of the deposit was observed at optimized current density by a Scanning Electron Microscope (SEM). X-ray Diffraction (XRD) analysis and EDAX confirm the presence of high intensity (103) plane and iron composition in the Zn-Fe alloy deposit at optimized current density is 4.0A/dm².

Keywords: Alloy electrodeposit; Corrosion rate; Current density; Mild steel