The Making of Lifetime Electroless Plating Solution of Nickel

Tests were conducted to make electroless plating solution of nickel by unform design.Its quality was assessed by composite index Z.The experimental data were processed by statistical software.Based on this,the effects of the factors on the pluting lifetime and velocity were studied.The composition of supplementary solution was determined with circular experiments.It was found that the supplemenlary quantity of lacate and hypophosphite had highest effects on the lifetime.Under loading 1.4dm2/L and supplementary lactate 3 mL/L·h and supplemartary hypophosphite:nickel=3.7∶1(mol),the period of utilization could be greatly extended.