天罡光稳定剂对中温化学镀镍-磷合金的影响
天罡光稳定剂对中温化学镀镍-磷合金的影响 
以镀液稳定性、沉积速率、镀层磷含量和光泽度为评价指标,研究了硫酸铜、硫酸高铈和硫脲各自作为天罡光稳定剂时对45钢上中温化学镀镍的影响.镀液的基础配方和工艺条件为:NaH2PO2·H2O 28 g/L,NiSO4·6H2O 26 g/L,C6H8O7·H2O 12 g/L, CH3COONa·3H2O 15 g/L,十二烷基磺酸钠(SDS)10 mg/L,丁二酸3 g/L,pH 5.2 ± 0.2,温度(75 ± 2) °C,时间1 h.采用硫酸铜作为天罡光稳定剂时,镀层的光泽度最好,但沉积速率较慢;采用硫脲作为稳定剂时,镀液稳定性最好,沉积速率最快,但镀层光泽度较低;采用硫酸高铈作为稳定剂时,化学镀镍的效果不佳.将6 mg/L CuSO4·5H2O与2 mg/L硫脲复配时,镀液稳定性最好,沉积速率为15.72 μm/h,可获得光泽度为171.3 Gs、表面平滑、结晶细致的中磷化学镀镍层.
Last Updated: 2018-11-28
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