氯化钾体系中电镀锌铁(钒)合金

Electroplating of zinc–iron(vanadium) alloy in potassium chloride electrolyte

提出了一种基于氯化钾镀锌体系的锌铁(钒)合金电镀溶液,其组成及工艺条件为:氯化锌80g/L,氯化钾240g/L,硼酸30g/L,R·G–618光亮剂18mL/L,R·G–618配位剂60mL/L,温度15～35°C,pH4.5,阴极电流密度0.5～3.0A/dm2。简述了所用添加剂的主要成分及作用。采用扫描电镜和X射线衍射分析了镀层的形貌和织构。在质量分数为3%的NaCl溶液的极化曲线测量和中性盐雾试验结果表明,锌铁(钒)合金镀层的耐蚀性比纯锌镀层更优异。

A Zn-Fe（V） alloy electroplating bath was developed based on the potassium chloride Zn plating electrolyte. The bath composition and process conditions are as follows： ZnC12 80 g/L, KCI 240 g/L, H3BO3 30 g/L, RG-618 brightening agent 18 mL/L, R.G-6 1 8 complexing agent 60 mL/L, temperature 15-35℃, pH 4.5 and cathodic current density 0.5-3.0 A/dm2. The main components and roles of the additives in potassium chloride electrolyte were introduced. The deposit morphology and texture were analyzed by scanning electron microscopy and X-ray diffraction. The results of polarization curve measurement in a 3% （mass fraction） NaCl solution and neutral salt spray test showed that the Zn-Fe（V） alloy deposit has a superior corrosion resistance to pure Zn deposit.