Hybrid Organosilicon-Metal oxide Composites and their Corrosion Protection Performance for Mild Steel in 3.5% NaCl Solution

The structural, curing, morphological, adhesion, and corrosion protection properties of a novel hybrid sol-gel polymeric material embedded individually with metal oxide additives on mild steel substrates have been carefully investigated. [Display omitted] •A novel hybrid sol-gel material has been successfully synthesized and spectroscopically characterized•The newly synthesized hybrid material was functionalized effectively with different metal oxide additives•The final functionalized developed coatings exhibited excellent morphological, mechanical and anticorrosion protection properties for mild steel substrate in 3.5% NaCl solution. The effect of embedding various metal oxide additives on the structural, curing, morphological, adhesion, and corrosion protection properties of a novel hybrid sol-gel polymeric coating has been examined using various characterization techniques. The coating formulation embedded with yttrium(III) oxide exhibited optimum low surface roughness, good adhesion to metallic substrates with elevated thermal stability, and enhanced barrier properties for mild steel substrates in 3.5 wt.% NaCl medium compared to the parent coating. Scanning electrochemical microscopy analyses indicated a dense, crack-free, and homogeneous nature for the coating layer on the steel. The coating’s degradation was evaluated using the scanning electrochemical microscopic technique.