Morphology and Corrosion Behavior of Zn-Ni Layers Electrodeposited on Low Alloy Carbon Steel Substrate

The aim of this work is to improve the microstructure, morphology, mechanical and corrosion behavior Zn-Ni layers electrodeposited on low alloy carbon steel. Some factors such as nickel concentration in electrolyte, electrolyte temperature current density are studied optimized. efficiency protect steel against HCl solution also work. morphologies microstructure were investigated by Scanning Electronic Microscopy (SEM) X-ray diffraction (XRD) respectively. best deposits obtained with 50%-Ni bath at a 40°C j = 3 A dm-2. XRD spectrum showed coexistence two phases: δ-phase (Ni3Zn22) γ-phase (Ni5Zn21), pyramidal morphology detected SEM. lost mass method results that rate tacked steady state between 10 50% Ni, it increased increase Ni amount bath.