利用双脉冲电沉积技术在碳钢基体上制备了Ni-P-SnO2纳米复合镀层。以沉积速率、显微硬度及表面形貌为考察指标，获得制备Ni-P-SnO2纳米复合镀层的最优工艺条件：2 g/L纳米SnO2、电流密度2 A/dm2、镀液温度60 ℃、电镀时间30~40 min、占空比20%~30%、频率100~150 Hz。通过SEM、XRD技术对Ni-P-SnO2复合镀层的表面形貌、相结构进行了表征；通过电化学测量技术对镀层的电化学行为进行了研究。结果表明:纳米复合镀层表面完整，没有明显的缺陷，纳米SnO2均匀地分布在Ni-P镀层中，硬度高，其耐蚀性能虽不及Ni-P镀层，缓蚀率也高达90%以上。

The nanometer composite coating of Ni-P-SnO2 was prepared on carbon steel substrate by double pulse electrodeposition technology. The deposition rate, microhardness and surface morphology were considered as selection standard to get the optimal technological conditions for preparing Ni-P-SnO2 nanometer composite coating: 2 g/L nanometer SnO2, current density of 2 A/dm2, plating liquid temperature of 60 ℃, plating time of 30 min, duty cycle of 20%~30%, frequency of 100~150 Hz. The surface morphology and phase structure of Ni-P-SnO2 composite coating were characterized by SEM and XRD; the electrochemical behavior of the coating was tested by electrochemical method. The results showed that the nanocomposite coating surface was intact, no obvious defects, nanometer SnO2 was uniformly distributed in the Ni-P plating layer, the corrosion resistance was not as good as Ni-P coating, but the inhibition efficiency was also up to 90%.