Aqueous,alkaline,cyanide-free bath for the galvanic deposition of zinc and zinc alloy coatings
申请人:Brunner Heiko
公开号:US20100236936A1
公开(公告)日:2010-09-23
The invention relates to an aqueous, alkaline cyanide-free electrolyte bath for de-positing zinc and zinc alloy coatings on substrate surfaces comprising (a) a source for zinc ions and optionally a source for further metal ions, (b) hydroxide ions, (c) a polymer of general formula I which is soluble in the bath and (d) at least one pyridinium compound of general formula II or III. The electrolyte bath is suitable for the galvanic deposition of bright and even zinc and zinc alloy coatings.
本发明涉及一种无氰碱性水性电解液浴,用于在基材表面上沉积锌和锌合金涂层,包括(a)锌离子来源和可选的其他金属离子来源,(b)氢氧化物离子,(c)通式I的可溶于电解液浴中的聚合物和(d)至少一种通式II或III的吡啶化合物。该电解液浴适用于电镀明亮均匀的锌和锌合金涂层。