Impact of CeO2 ceramic nanoparticles on corrosion and mechanical properties of composite coatings developed with electroless deposition method

Corrosion remains one of the most critical challenges limiting the durability and service life of metallic components. Traditional coatings often struggle to provide long-term protection while maintaining sufficient mechanical strength. To address this, the present study investigates the Ni-P nanocomposite coatings developed by electroless deposition process, and their impact by adding cerium oxide (CeO₂) nanoparticles (NPs) at two concentrations, 0.25 and 0.50 g/L. The introduction of CeO₂ NPs into the Ni-P matrix improved the morphology by forming a more compact and uniform coating structure. Moreover, the CeO₂ nanoparticles reinforcement strengthened the coating, making it more durable and resistant to wear and abrasion. The presence of inert CeO₂ NPs effectively reduced the active area exposed to corrosive agents and improved the corrosion resistance properties of the coatings. The protection efficiency of 98.44 % was achieved for the Ni-P-0.25CeO₂ nanocomposite coating, which is a significant enhancement compared to uncoated carbon steel.