Nanostructured Coatings Approach for Corrosion Protection of Building Steels

Corrosion of steel reinforcement is a persistent durability concern for concrete structures, since conventional coatings often fail to provide lasting protection due to poor adhesion and insufficient barriers in harsh environments. This research focuses on advancing corrosion resistance by introducing nanostructured coatings that combine epoxy, cement, and nano-silica materials. Four distinct coating formulations were developed—epoxy, epoxy–cement, epoxy–nano-silica, and epoxy–cement– nano-silica—and subjected to systematic testing under accelerated corrosion conditions. We measured weight loss to see how well the material was doing, since this shows how much it had broken down. The results reveal that adding nano-silica makes the coating much denser and stronger, which lowers the rate of corrosion. The tests showed that the epoxy-nano-silica coatings were the best at keeping rebar of different sizes safe. These results support the idea that nanostructured hybrid coatings could help reinforced concrete last longer in tough conditions.