Rameshbapu, G.N.K. and Kumaresan, R.
(1997)
Additive characteristics in mixed chloride zinc electrolytes.
Bulletin of Electrochemistry, 13 (04).
pp. 166-169.
ISSN 0256-1654
Abstract
Considering the pollution hazards and high industrial effluent treatment costs, non-cyanide zinc plating baths have been developed. Acid type plating baths have been successfully used in electrogalvanising of steel wires and strips due to high plating rates and low operating cost. Chloride baths have come into use recently because of the ease of control and higher rate of deposition. In the present study, an attempt was made to explore the characteristics of few additives in mixed chloride electrolytes. Presented in this paper are the results of investigations on cathode current efficiency, throwing power and brightness of zinc deposit obtained from mixed chloride zinc electrolytes in presence of piperonal, sodium ligno sulphonate, p-toluene sulphonamide, phenol sulphonic acid and dihydroxynaphthalene additives. Among the various organic additives studied, piperonal and dihydroxy naphthalene gave bright deposits with a better throwing power
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