Microstructural and magnetic properties of cadmium incorporated magnetic alloys as monolayer and multilayer coatings

Abstract

This study deals with the electrodeposition of cadmium incorporated Cobalt–Nickel magnetic alloy as monolayer and multilayers. Magnetic alloys have been electrodeposited on commercial copper plates from chloride-based electrolyte under the controlled deposition condition. Co–Ni–Cd monolayer coatings were electrodeposited from two different cadmium concentrations (0.1 and 0.2 M) whereas multilayer coatings were electrodeposited with and without the addition of sodium hypophosphite in the electrolyte. Microstructural properties of the prepared alloy coatings were studied using X-ray diffractogram, and energy dispersive X-ray analysis (EDAX) spectrum, which reveals the development of nano deposits with appropriate elements. Field emission scanning electron microscopy (FE-SEM) micrographs of the alloys confirm nanostructure formation in both mono and multilayer coatings. Magnetic and corrosion properties of the coatings have been analyzed using the magnetic hysteresis loop (M–H plot) and immersion corrosion method. From this study, magnetic properties of cadmium incorporated coatings found to be closely related to magnetic elements, which leads to a significant change in the corrosion performance.