An amorphous NiP?WC composite coating was prepared on a copper substrate by chemical plating. The corrosion resistance of the coating was studied in a NaCl solution with a mass fraction of 3.5% and a 1 mol/L hydrochloric acid solution. The surface morphology, composition, and microstructure of the coating were characterized by scanning electron microscopy (SEM), Energy dispersive spectrometer （EDS）, and X?ray diffraction (XRD). The corrosion resistance of the coating was analyzed by potentiodynamic polarization and impedance spectroscopy. The results show that in a NaCl solution with a mass fraction of 3.5%, the self corrosion potential of NiP?WC coating shifted approximately 111 mV higher as compared to amorphous NiP coating, resulting in a decrease of approximately 68.8% in self corrosion current density and an increase of approximately 6.7 times in charge transfer resistance. Soaking in 1 mol/L hydrochloric acid solution, the corrosion rate of NiP?WC coating decreased by about an order of magnitude compared to NiP coating, indicating that uniformly distributed WC particles can significantly improve the corrosion resistance of amorphous NiP.