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热词
    • 30. 发明授权
    • Bright acid zinc plating method and electrolyte
    • 明亮的酸性镀锌方法和电解液
    • US3920528A
    • 1975-11-18
    • US40969473
    • 1973-10-25
    • SCHERING AG
    • VOSS GUNTERHOFFMANN HELGA
    • C25D3/22
    • C25D3/22
    • Bright zinc electrodeposits are obtained at high current densities from aqueous, acid electrolytes containing zinc ions, inert alkali metal salts of strong mineral acids for improving conductivity, and a brightener which includes a small amount of an acid having a carboxyl group or a sulfo group attached directly or through a lower alkylene, vinyl, carbonyl, or phenylene group to the heterocyclic ring of pyridine, quinoline, isoquinoline, pyrrol, piperidine, pyrrolidine, or pyrrolidone. The electrolytes are free from significant amounts of complexing agents that would impede precipitation of the zinc ions at weakly alkaline pH so that the electrolytes do not present a waste disposal problem.
    • 以含有锌离子的水性酸性电解质,强无机酸的惰性碱金属盐,改善导电性的高电流密度获得明亮的锌电沉积物,以及包含少量具有羧基或磺基的酸的增白剂 吡啶,喹啉,异喹啉,吡咯,哌啶,吡咯烷或吡咯烷酮等杂环的低级亚烷基,乙烯基,羰基或亚苯基。 电解质不含显着量的络合剂,其将在弱碱性pH下阻止锌离子的沉淀,使得电解质不会产生废物处理问题。