Simulation and experimental research on nickel-based coating prepared by jet electrodeposition at different scanning speeds

In order to explore the deposition mechanism of the nickel-based coating prepared by jet electrodeposition, accurately control the thickness of the coating, and improve the coating performance, the deposition mechanism and process experiments of the nickel-based coating prepared by jet electrodeposition were carried out. Based on this deposition mechanism, a multi-physical field coupling model of the deposition process was established, and numerical solutions of the deposition processes at different scanning speeds were formulated. The numerical distribution of each physical field and the deposition thickness of nickel-based coating were obtained, a corresponding experiment for exploring preparation process was carried out, the cross-section thickness of the coating was measured, the wear resistance and corrosion resistance of the coating were characterised and the coating thickness obtained using the experiment results and numerical solution was analysed. Results show that the coating thickness obtained after the process test and that obtained using the numerical solution increase first and then decrease. The average engineering error δ is 19.43%, which verifies the accuracy of the numerical solution model. When the scanning speed is 200–1000 mm/min, the grain size of the coating decreases with increasing scanning speed, whereas microhardness, wear resistance and corrosion resistance increase first and then decrease. When the scanning speed is 600 mm/min, the nickel-based coating has good comprehensive properties, the maximum thickness is 26.65 ± 0.28 μm, the microhardness is 622.82 HV, the wear area is 2766.75 μm², the self-corrosion potential is − 0.33 V, the self-corrosion current density is 5.16E-7 A cm² and the equivalent impedance is 4660 Ω.