The Electrodeposition of Nickel from Nickel Chloride Solutions

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Abstract
Nickel deposited from a nickel chloride‐boric acid solution is finer‐ grained, smoother, harder, stronger and somewhat less ductile than soft deposits from the ordinary sulfate electrolyte. Tested in the as‐plated condition, coatings from the two baths are of about equal protective value when of equal thickness. The results of laboratory tests indicate that advantages which can be obtained by electroplating from the chloride solution instead of from the sulfate bath include the following : a 50 per cent reduction in tank voltage and power consumption ; ease of control due to simple composition, wide plating range, high anode and cathode efficiencies ; lower susceptibility to pitting ; smoother, tougher deposits ; less tendency to form nodular growths and trees on thick deposits; and production of coatings which are easier to buff. The principal disadvantage of the chloride bath is the greater corrosiveness of the solution. However, modern materials are available which can be used to overcome this.

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