Zn-Cu-Fe alloys can be used for coating on mild steel substrate for the enhancement of mechanical properties of the substrate. So, it will be interesting to study what sort of effect of Fe content if the coating of an alloy Zn-Cu-Fe is deposited on mild steel. For this purpose, four samples of Zn-Cu-Fe alloy on mild steel substrate are prepared by electrodeposition. This technique is favorable because of its low cost and easy approach. The electrolytic bath contained the 0.15M ZnSO4, 0.15M CuSO4, (0.00M, 0.03M, 0.06M, 0.09M) FeSO4.7H2O and 0.25M H3BO3 as buffer during the deposition process. The value of an operating parameter such as deposition time, temperature, current density, and pH are kept at 15–20 mints, 298K, 0.02 Acm−,2 and 3 respectively. The analysis is done by studying crystallographic parameters of the ternary Zn-Cu-Fe alloy coating, surface morphology and mechanical properties are studied. Results obtained by electrodeposition with various concentrations of Fe showed that the surface become more smooth, average grain size decreased, lattice parameters and crystal size showed overall decreasing trends and the mechanical properties are enhanced. Due to these improved properties of coating substrate becomes more useful for construction, automobile fencing applications.

Mild steel has applications in construction, automobiles, mechanical engineering and general purpose fabrication, fencing, cages, frames, furniture components for different shapes, pipelines and other in industries. Cu-Fe-Ni alloy coating with different concentration of Ni was produced on low carbon steel substrate by electrodeposition in this research. This technique is favorable to us because of its low cost and easy to approach. The electrolytic bath contained the 31.92g/l CuSO4, 54.2 g/l FeSO4, NiSO4.7H2O (0.00 g/l, 14.04 g/l, 28.08 g/l, 42.12 g/l) and 15.4 g/l H3BO3 as buffer to maintain pH at 3. The electrodeposition is done at suitable deposition parameters. The effect of Ni concentration on the surface morphology, structure and mechanical properties of coating were revealed by scanning electron microscope (SEM), X-ray diffraction (XRD) analysis and Vicker hardness tester respectively. Obtained results showed that with the increase in Ni content grain size increases and elongation decreases while the mechanical properties increases. The thickness of deposited Cu-Fe-Ni alloys has decreasing trend of thickness with increasing of Ni contents.