| 摘要 |
1. Alkaline bath for zinc-plating including 5-50 g/dm3 of a soluble zinc compound, 70-200 g/dm3 of alkaline hydroxide, 0-100 g/dm3 of alkaline cyanide and a shine addition, consisting in that the shine addition agent is a cationic aliphatic-heterocyclic oligomer obtained as the reaction product of imidazole and/or nicotinic acid, morpholine, aliphatic alkanolamine and diamine with epihalogenohydrin in water and/or glycol environment, while the molar ratio of heterocyclic compounds and aliphatic amines to epihalogenohydrin is preferably from 1:1:2 to 1:2:4.
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