Addition Agents in the Electrodeposition of Zinc

Abstract

A group of amines was studied to determine their effect as addition agents in the electrodeposition of zinc. Amines of low number of carbon alkyl radicals showed a tendency toward good addition agent properties. The nitrogen in the amine in terms of grams N2 per liter of electrolyte must be controlled so as to obtain the most beneficial effects of the addition agent. The length of the organic radical attached to the amine was found to have a decided influence. Other factors such as wetting properly and compound salt formation were studied and compared with the experimental data obtained with a few addition agents. These latter factors do not appear to be of the controlling type, such as the three factors above, for obtaining bright, ductile zinc deposits.