Investigation of Corrosion and Wear Behavior of Ni-WS۲ Nanocomposite Coating on St۳۷ Steel

S۱۳۷ steel, despite its favorable mechanical properties and widespread use as a structural material, exhibits rapid corrosion and wear degradation in aggressive environments and severe tribological conditions. In this research, a Ni-WS۲ nanocomposite coating was successfully electrodeposited on St۳۷ substrate to simultaneously enhance its corrosion and wear resistance. Surface morphology examined by SEM revealed a dense cauliflower-like structure with uniform distribution of WS۲ particles and significant grain refinement of the nickel matrix, free from cracks and major porosity. Pin-on-disk tests demonstrated a reduction of over ۸۰% in the coefficient of friction along with excellent stability, attributed to the formation of a low-shear transfer film from layered WS۲. Potentiodynamic polarization curves indicated a substantial shift of corrosion potential toward more noble values and a decrease in corrosion current density by more than one order of magnitude compared to the bare substrate. The results confirmed the synergistic effect of WS۲ in concurrently improving tribological properties and corrosion resistance, establishing the developed coating as a highly effective protective solution for industrial applications under harsh operating conditions.

کلیدواژه ها:

S۱۳۷ steel ، Nanocomposite coating ، Ni-WS۲ ، Electrodeposition ، Wear resistance ، Corrosion resistance