| Summary: | Electrodeposition is a well-known and economical method in the coating industry due to its low cost and fast process. This study investigates on the charateristic of electrodeposited Co-Ni-Fe alloy coating coated on three different substrates that is aluminium, brass and stainless steel. The surface morphology, microhardness, surface roughness, and corrosion resistance of Co-Ni-Fe electrodeposited on aluminium, brass and stainless steel was determined. This study compares the different properties of the Co-Ni-Fe alloy coating coated on aluminium, brass and stainless steel which can enhance the mechanical, chemical and corrosion properties of these metals. Aluminium deposited with Co-Ni-Fe alloy coating had the highest microhardness of 427.4 Hv as compared to brass and stainless steel. Mean-while the surface roughness for all metals deposited with Co-Ni-Fe alloy coating was reduced significantly. In terms of the corrosion behavior, brass coated with Co-Ni-Fe alloy coating has the lowest corrosion rate of 4.699×10-3 mmpy while stainless steel and aluminium had a corrosion rate of 19.82×10-3 mmpy and 66.15×10-3 mmpy, respectively. From the findings it can be seen that microhardness and corrosion resistance showed an increase of about 40% after depositing the aluminium, brass and stainless steel with Co-Ni-Fe alloy coating. © 2018 Authors.
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