采用电弧法分别在高低两种H_2分压下制备了Cr纳米粉(标记为Cr_Ⅰ和Cr_Ⅱ).在电解液中浸泡过的两种Cr纳米粉的XPS分析结果表明,Cr_Ⅱ纳米粉表面在电解液中形成的Cr_2O_3膜比Cr_Ⅰ薄.电化学分析表明,Cr_Ⅱ纳米粉表面更易吸附Cl~-,导致其更容易与Ni共电沉积,这是因为表面氧化膜较薄的Cr_Ⅱ粉,氧化膜可被表面吸附的C1~-点蚀而穿透,导电性增强,使得Ni~(2+)更容易在其表面上还原,快速将Cr_Ⅱ嵌入共电沉积层中. The Cr nano-powders (labeled as Cr_Ⅰ and Cr_Ⅱ) were prepared by arc method at two partial pressures of H2 and H2 respectively.The results of XPS analysis of the two Cr nano-powders soaked in the electrolyte showed that the surface of Cr_Ⅱ nano- Cr_2O_3 thin film is thinner than Cr_ I. Electrochemical analysis shows that the surface of Cr_ Ⅱ nanopowder is more easily adsorbed Cl ~ -, which makes it easier to co-electrodeposit with Ni, because the surface oxide film is thinner Cr_ Ⅱ powder, the oxide film can be The surface adsorption of C1 ~ - pitting and penetration, enhanced conductivity, making Ni ~ (2+) easier to reduce on the surface, quickly embedded Cr_ Ⅱ co-electrodeposited layer.