为了进一步将低温碱性化学镀镍一磷应用于工业生产,在已开发的低温碱性化学镀镍工艺基础上,重点研究了香豆素添加剂对镀速和镀层的影响。结果表明:少量香豆素能使镀速增大,但浓度大于10mg/L后镀速反会降低;香豆素为10mg/L时镀层平滑、致密,由球形颗粒组成,大小均匀,约为5—6μm,晶粒间无孔隙;香豆素对镍-磷镀层的组成基本无影响;香豆素为10mg/L时镀层的XRD谱由Ni主衍射峰及Ni5P4次衍射峰组成;香豆素对Ni沉积峰电位无显著影响,但会使其阴极峰电流密度增大,且随香豆素浓度的增加先增大后减小;香豆素与磺酸类添加剂的协同作用使阴极峰电位显著负移,过电位增大。
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