Abstract
Investigations were made on the effects of halogen ions in nickel sulfate plating baths of various concentrations.
Experiments were conducted on natinal electrode potential of electrolytic Ni anode, anodic polarization, anode potential, anode efficiency, cathodic polarization, bath voltage, and a few properties of Ni electrodeposits.
The results obtained were as follows:
(1) It was found that Cl-, Br-, and I- ions promoted anodic dissolution; whereas, F- ion acted as an inhibiter for the anodic dissolution. They were arranged in dessending order of reactivity as follows: Cl->Br->I->F-
(2) Halogen ions had effects on hardness and stress of Ni deposits.
