在铝件可焊性电镀工艺中,为降低成本,减少污染,在铝件浸锌后,以氨基磺酸亚铁体系镀铁取代镀镍中间层工艺。通过Hull槽试验对氨基磺酸盐镀液的pH 值、操作温度、镀液组成等工艺条件进行了优化,并对优化工艺制得的镀层样品进行了结合力、耐蚀性及可焊性方面的表征。结果表明,氨基磺酸盐镀铁工艺可达到良好的镀层结合力和镀锡层焊料润湿性,但耐蚀性能稍有欠缺。

Aiming at lowering the cost and reducing the pollution in solderable electroplating process of aluminum substrate, the technology of iron plating in ferrous sulphamate bath system as nickle substitute after zincation process was achieved. Technical conditions such as bath pH, operating temperature and bath compositions were optimized through Hull cell test. The adhesion, corrosion behavior and solderability of the corresponding coatings acquired in the optimum conditions were characterized respectively. It indicates that sulphamate iron platingtechnology could achieve well coating adhesion and solder wetting ability of tin-plating layer though the anti-corrosion behavior is not so good.