The Effect of Some Addition Agents on Stress in Nickel Deposits

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Abstract
Twenty-two addition agents were used singly and several in pairs in a Watts solution and their effect on stress in the nickel deposit was determined. Stress was affected by every additive, demonstrating that it is a more sensitive property than cathode potential. Addition agents either raise stress, lower it or lower it at low concentrations and raise it at high concentrations. No relationship was found between the chemical properties of an addition agent and its influence on stress, except that the effects produced by thiourea and by its derivatives were similar. In general, mixtures of two additives were found to produce effects intermediate between those exerted by the respective components, and closer to those of the addition agent present in the higher concentration.