A study on brightening property of newly synthesized compound in electroplating of zinc-nickel alloy

Abstract

155-162The electrodeposition of zinc-nickel (Zn-Ni) alloy from chloride bath was carried out in presence of condensation product formed between thiamine hydrochloride (THC) and furfural (FFL). The bath constituents were optimized through Hull cell experiments. Operating parameters such as pH, temperature and current density were also optimized. Current efficiency and throwing power were measured. Polarization study revealed shift of potential towards negative direction in the presence of addition agents. Corrosion resistance tests revealed good protection of base metal by Zn-Ni alloy deposit. SEMs showed fine-grained deposit in the presence of condensation product. FTIR spectrum of the scrapped deposit showed the inclusion of condensation product in the deposit during plating. The consumption of brightener in the lab scale was 5 mLL⁻¹ for 1000 amp-h