| abstract |
This disclosure provides a sol‐gel hybrid coating composition, comprising a sol‐gel precursor, a polymer and a solvent, wherein the sol‐gel precursor comprises tetraethyl orthosilicate and the polymer comprises polyurethane and polyacrylic. This disclosure also provides a coating process, comprising: subjecting a light metal to micro‐arc oxidation treatment to form a first protection layer on the light metal, and coating the sol‐gel hybrid coating composition onto the first protection layer to form a second protection layer. This disclosure further provides composite coating layers, comprising: a first layer obtained by micro‐arc oxidation treatment, and a second layer obtained by dip coating with the sol‐gel hybrid coating composition. |