Synergistic Protection Mechanism of Underwater Welding Technology and Long-Term Anti-Corrosion Coatings for Marine Engineering

Marine structures are crucial for offshore energy production, transportation, and various industrial activities, but they are highly susceptible to corrosion, which significantly reduces their operational lifespan. While underwater welding and anti-corrosion coatings are commonly used individually to address these issues, there is a lack of research into integrating these two techniques for enhanced long-term protection. This study proposes a synergistic protection mechanism that combines underwater welding with advanced anti-corrosion coatings to improve corrosion resistance and structural integrity in marine environments. The proposed system was optimized using multi-objective genetic algorithms to balance welding parameters and coating properties. Experimental results show that the integrated system improves corrosion resistance by 30% compared to traditional welding methods and by 15% over existing systems. The synergy between welding and coating is verified through ablation studies, which show that the combined system offers superior protection, achieving a corrosion resistance of 0.2 g/cm 2 , compared to 0.29 g/cm 2 for welding alone. This research provides a novel approach to marine corrosion protection, offering significant potential for reducing maintenance costs and extending the lifespan of underwater structures. The findings contribute to both academic knowledge on welding-coating integration and practical solutions for the marine industry, with implications for improving sustainability and reducing operational costs