Electroextraction of zinc from sulphate electrolytes containing antimony and hydroxyethylated-butine-2-diol-1,4: Part 2: Deposition on a specpure aluminium cathode

The electroextraction of zinc on a specpure aluminium cathode from sulphate electrolytes containing antimony and hydroxyethylated-butyne-2-diol-1,4 (EAA) has been studied. It was established that the process of reverse zinc dissolution in the presence of antimony ions starts from the very beginning of electrolysis. It is found that the inhibitory effect of the additive on the zinc redissolution manifests itself immediately after the start of electrolysis. The inhibitor concentration of 1.0 ml L−1 results in an increase in the amount of deposited metal twice and in an increase of zinc current efficiency from 30% up to 80%.