Optimisation of Conductivity for the Ferrous Chloride Electroforming Solution

Summary

Electroforming solutions require high solution conductivity and high metal ion concentration in order to fulfil their role as a rapid means of electroplating at minimum power cost. A systematic study has been made of the conductivity of concentrated ferrous chloride solutions, the effects of a number of ‘conductivity salt’ additions investigated and an optimisation suggested, based on a reduced ferrous ion concentration with selected cations added, at a pH of 0.5-1.0 and a temperature of ~100°C.