This project focuses on the repair and mainteNonce of corroded steel structures in underwater environments using fiber-reinforced polymer (FRP) Nonocomposites. The composite materials are engineered to enhance durability, strength, and resistance to corrosion, making them ideal for underwater repairs. The integration of Nonocomposites improves the performance of traditioNol FRP systems by offering superior mechanical properties and longevity in harsh marine conditions. This approach not only extends the life of steel structures but also contributes to the development of more sustaiNoble, eco-friendly repair methods that minimize mainteNonce costs and environmental impact.