A new brightener for zinc plating from non-cyanide alkaline bath

318-323Zinc electrodeposition from non-cyanide alkaline solution was carried out in presence of salicylaldehyde, a new brightener. The bath constituents and bath variables were optimized through standard Hull cell experiments. Current efficiency and throwing power of the developed bath were measured. Polarization study revealed the shifting of potential towards more cathodic direction in presence of addition agents. Corrosion resistance test on zinc coated steel revealed good protection of the base metal by the zinc coating. SEM photomicrographs of the deposits showed fine-grained crystal growth in the presence of salicylaldehyde. The consumption of brightener was 0.4 mLL-1 for 1000 A-h