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我们针对钾盐镀锌镀液成本高,添加剂和酸的消耗较快等缺点,对钠盐镀锌基础溶液进行研究,研制出用组合型缓冲剂取代硼酸,和市场出售的微酸性镀锌添加剂组成钠盐镀锌液。经小槽考核后投入3000升大槽生产,嗣后又应用于滚镀槽镀锌,均取得良好的效果。1.钠盐镀锌液的组成及作用 1)滚镀锌配方和操作条件氯化钠 181～220克/升氯化锌 50～70克/升组合型缓冲剂 20～50克/升添加剂 14～18毫升/升 pH 5～6.2 温度 5～50℃电流密度 0.5～2安/分米~2 时间 30～45分
In view of the disadvantages of high cost of potassium salt plating bath, rapid consumption of additives and acids, we studied the basic solution of sodium salt zinc plating, developed a combination of buffer agent to replace boric acid, and marketed slightly acid zinc additive Composition of sodium salt zinc plating solution. The small tank after the test into 3,000 large tank production, and later applied to the galvanized tank plating, have achieved good results. 1. Composition and role of sodium salt zinc plating solution 1) Rolled zinc formulation and operating conditions Sodium chloride 181 ~ 220 g / l Zinc chloride 50 ~ 70 g / l Combined buffer 20 ~ 50 g / l Additive 14 ~ 18 ml / L pH 5 ~ 6.2 Temperature 5 ~ 50 ℃ Current density 0.5 ~ 2 A / dm ~ 2 Time 30 ~ 45 min