THE EFFECT OF ADDITIVES ON THE INTERNAL-STRESS OF NICKEL DEPOSITS FROM WATTS BATHS

For minimizing stress, the optimum concentrations of Class I and Class II brighteners and a surfactant in a Watts bath were determined by measuring the curl of thin strips plated with nickel and using orthogonal array techniques and statistical analysis. The optimum concentrations were 0.72 g/L saccharin; 0.17 g/L 2-butyne-1,4 diol; and 0.60 g/L aerosol AY.