采用电刷镀技术获得了Ni-Co合金电刷镀层,借助于扫描电子显微镱观察得到了镀层的表面形貌图.通过改变镀液中Co离子含量的比例,使镀层中Co元素含量发生变化,从而使镀层表面形貌发生变化.利用盒维数的计算方法,计算出了不同Co元素含量的表面形貌分形维数.以分形维数作为衡量指标,研究了镀液中Co元素比例对镀层表面形貌的影响. The brush plating was used to obtain the Ni-Co alloy brush coating, and the topography of the coating was obtained by scanning electron microscopy ytterbium. The Co content in the coating was changed by changing the proportion of Co ion in the bath The surface topography of the coating was changed. The fractal dimension of the surface topography was calculated by the calculation of the box dimension. The fractal dimension of the surface topography was used as the index to study the effect of Co element ratio Effect on the surface morphology of the coating.