Abstract
Five ml/l of the reaction product obtained from ethylenediamine and epichlorohydrin was added as a brightener to the zincate bath composed of ZnO (10g/l) and NaOH (100g/l).
Bright zinc plating from this bath had similar appearance, range of current density for brightening, and throwing power to those of the deposit from cyanide bright zinc plating bath. However, the current efficincy was slightly lower and the hardness was higher as compared with the deposit from the cyanide bath. Accordingly, the ductily of the former deposit seemed to be inferior to that of the latter.
