Abstract
In this research, tribocorrosion behavior of Ni-P-ZrO₂ electroless composite coating has been investigated in 3.5 wt.% NaCl solution. The steel samples were deposited by electroless deposition to form Ni-P and Ni-P-ZrO₂ coatings. XRD and SEM were used to evaluate the microstructure of the coatings. Also, the corrosion and tribocorrosion behavior of the coatings have been investigated in 5 wt.% NaCl electrolytes. The results showed that the repassivation rate of Ni-P-ZrO₂ composite coating was higher than the mechanical depassivation rate. Also, the corrosion resistance of the Ni-P coating was lower than that of Ni-P-ZrO₂ composite coating after tribocorrosion. Moreover, the synergistic effects of corrosion and wear at an anodic potential (–100 mV_Ag/AgCl) indicated that corrosion had more contribution to the weight loss in Ni-P coating rather than that of Ni-P-ZrO₂ coating.

Key words
tribocorrosion, electroless, composite, zirconia, coating

Full text (831 KB)