研究了Ni-Co合金的电沉积过程，讨论了电镀工艺条件的改变对合金镀层钴含量的影响。实验结果表明，选择适当的阴极电流密度、电解液温度和镀液PH值等，可以获得表面光洁、平整和致密的耐蚀性能比镍镀层更好的合金镀层。实验中测定了电沉积过程的阴极极化曲线，表明Ni－Co合金的共沉积机理为异常共沉积。 The electrodepositing process of Ni-Co alloy was studied. The effect of the change of electroplating process on the cobalt content of the alloy coating was discussed. The experimental results show that the proper surface current density, electrolyte temperature and the pH of the electrolyte can be obtained to obtain a smooth, compact and dense alloy coating with better corrosion resistance than the nickel coating. In the experiment, the cathodic polarization curve of the electrodeposition process was measured, indicating that the co-deposition mechanism of Ni-Co alloy is abnormal co-deposition.