*5.1. Chloride Baths*

Many researchers over the years have used chloride baths to electrodeposit Ni–Co alloys and nanocomposites. Nickel chloride added to the chloride baths provides Cl− ions which are essential for efficient dissolution of the nickel anode [72]. Fan and Piron [67] studied anomalous electrodeposition of Ni–Co alloy on Cu substrates using complex citrate and simple chloride baths. It was reported that the Ni–Co electrodeposited using the chloride baths exhibited anomalous deposition where the content of Co was higher than in the complex citrate bath. This was attributed to preferential deposition of Co which was more reactive (less noble) than Ni. It was also found that simple chloride baths were better suited at electrodepositing at current densities as low as 0.1 mA·cm<sup>−</sup>2.
