Abstract
The effects of bath compositions and brighteners on corrosion resistance of bright nickel plating were studied. The results obtained were as follows:
(1) The interaction between the concentrations of nickel sulfate and nickel chloride had no effects on corrosion resistance.
(2) The interaction between the cathodic current density and the concentration of total nickel had effects on corrosion resistance. Higher corrosion resistance was obtained under the conditions of lower concentration of total nickel and lower cathodic current density, or the higher concentration of total nickel and the higher cathodic current density.
(3) Corrosion resistance was varied according to the kind and concentration of brighteners in double nickel plating.
(4) The interaction between the kind of brighteners and cathodic current density had effects on corrosion resistance.
(5) However, in CASS test of triple nickel plating, the kind of brighteners and cathodic current density had no effects on corrosion resistance.
