This study explored the corrosion control mechanisms of ordinary Portland cement (OPC) slurry-coated steel and steel coated with nano-TiO2 admixed OPC slurry, subjected to normal water and saline water (3.5% NaCl) exposure. To evaluate the corrosion rates of these coatings, potentiodynamic polarization measurements were taken after 30, 60, 90, and 120 days in both environments. Additionally, weight loss measurements at the 120-day mark were conducted to validate the polarization results. The findings indicated that all coating systems provided significant corrosion inhibition compared to bare steel. Notably, the steel coated with nano-TiO2 admixed cement slurry exhibited a higher corrosion inhibition efficiency than the plain OPC slurry-coated steel. This highlights the effectiveness of incorporating nano-TiO2 in enhancing the protective properties of cement-based coatings against corrosion, making them a promising option for improving the durability of reinforced steel structures in challenging environments.