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Aqueous,alkaline,cyanide-free bath for the galvanic deposition of zinc and zinc alloy coatings
Aqueous,alkaline,cyanide-free bath for the galvanic deposition of zinc and zinc alloy coatings
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机译:水性,碱性,无氰化物浴,用于电镀锌和锌合金涂层
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摘要
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.; 展开▼