| 摘要 |
A non-cyanide acid or substantially neutral zinc electroplating bath and zinc plating process employing said bath which contains a brightening and leveling agent, and which comprises a bath soluble quaternary salt formed by the reaction of a heterocyclic compound with an alkylating agent comprising a dialkyl sulphate, an alkyl alkane sulphonate or an alkyl arene (e.g. toluene) sulphonate, or with an alkyl halide. The heterocyclic compound may be pyridine, (iso)quinoline, quinaldine, pyrimidine, phenazine, imidazole, imidazoline, pyrrole, pyrazole, pyrazine, purine, acridine, (iso)nicotinate, nicotinic acid, nicotinamide or derivative thereof. A polyether compound may be also present. |
