Preparation, corrosion resistance and mechanical properties of electroless Ni-W-P-eGO composite coatings

In this paper, highly dispersed edge graphene oxides (hereinafter referred to as eGO) were successfully applied in the Ni-W-P bath system, and high-performance Ni-W-P-eGO coating was prepared on the surface of N80 carbon steel by an electroless deposition method. By investigating concentration of eGO in solution in the solution, and using XPS, XRD, EDS, and SEM to analyze the crystal properties, electroless composition, micromorphology, and microstructure of the coating in detail,and the hardness, corrosion resistance and wear resistance of the coatings were investigated by microhardness tests, electrochemical corrosion and friction and wear tests. The niversal electrochemical methods determined the corrosion resistance of the coating, and the abrasion resistance of the coating was determined by ageneralduty reciprocating test. The experimental characterization results show that the addition of eGO nanomaterials to the Ni-W-P composite coating significantly improves the corrosion resistance of the coating in 3.5 wt% NaCl solution, improve the mechanical properties of the coating. When eGO content reaches 0.1 g/l, Ni-W-P-eGO coating demonstrated the most excellent corrosion resistance with a corrosion current of 0.9476 mu A/cm(2), and mechanical properties (the average friction coefficient is 0.173, and the microhardness value is 744.58 HV).

Automated summary

In this paper, highly dispersed edge graphene oxides (eGO) were successfully applied in the Ni-W-P bath system to prepare a high-performance Ni-W-P-eGO coating. The addition of eGO nanomaterials significantly improved the corrosion resistance and mechanical properties of the coating.