A method for producing shining galvanised or shaped articles coated with a zinc alloy

摘要

The production of shiny galvanised or zinc-alloy-coated mouldings by the electrolytic separation of zinc or a zinc alloy from aqueous-acid galvanic baths which contain as essential components one or more zinc salts and possibly salts of the other alloy metals, one or more conducting salts, one or more tensides and one or more gloss agents, in which the gloss agents used are compounds (I), in which R1 is C1 to C8 alkoxy, phenoxy, benzyloxy, amino, C1 to C6 alkyl amino or Di(C1 to C6) alkylamino, R2 is C1 to C4 alkyl, phenyl, benzyl or the substances under R1, and Ar is phenyl or naphthyl which may additionally be substituted by one to three C1 to C4 alkyl groups or C1 to C4 alkoxy groups, and the auxiliary gloss agents are compounds of the general formula (II) H-(OA1)m-S-(A2O)n-H and/or (III) R3-S-(A1O)m-H, in which R3 is C1 to C24 alkyl, A1 and A2 are, mutually independently, an alkylene group or a mixture of alkylene groups with 2 or 3 C atoms and m and n are mutually independently an integer from 1 to 100.