Thermally Sprayed Coatings for Concrete Protection in Cold Marine Environments

Abstract Concrete in cold seawater suffers from freeze-thaw damage (cracking, scaling) and steel corrosion (chloride penetration), increasing maintenance and risking failure. To improve protection, this study investigates a multilayered coating: a sealant top layer over a thermally sprayed zinc bond layer. The coating's long-term durability was tested under icing conditions before and after 96 hours of salt spray. Results show the multilayered coating's icephobic properties remained stable despite corrosion exposure, suggesting it can enhance the lifespan of concrete in harsh marine environments.