Influence of the Number of Anti-Corrosion Paint Layers Against Atmospheric Corrosion in Chimbote Bay, Peru

Objectives: This study evaluated the behavior of an epoxy coating (50-82% solids by volume) against atmospheric corrosion in Chimbote Bay, Peru, a critical area for steel structures. Theoretical Framework: It was based on international standards and previous studies on the degradation of marine steels, highlighting the importance of effective anticorrosion strategies for coastal areas, which informed the choice of the epoxy system. Method: Forty-eight specimens of ASTM-131-01 grade A steel were exposed in Chimbote, 150 meters from the coast. The specimens were divided into three groups: unprotected, with a base coat plus one epoxy coating, and with a base coat plus two epoxy coatings. The samples were evaluated every 3 months for a period of 15 months. Results and Discussion: The results showed that the three-layer system offered greater corrosion resistance and remained in good condition. The unprotected specimens, in contrast, suffered complete deterioration. These findings confirm that three-layer systems extend the life of steel and exceed minimum international protection standards. Research Implications: The study provides relevant theoretical and practical implications, supporting the implementation of more effective protection systems in the naval, port, and coastal industries. Originality/Value: The originality and value lie in the specific evaluation of the epoxy coating under the atmospheric corrosion conditions of Chimbote. The results confirm the superiority of the three-layer systems, providing a solid basis for optimizing anticorrosion strategies in demanding marine environments.