▎ 摘　　要

NOVELTY - A coating comprises hydrophobic bottom layer comprising composite paint comprising primer, curing agent (A), polysilazane resin and graphene oxide and hydrophobic surface layer comprising hydrophobically modified nano-silica. USE - Coating. ADVANTAGE - The coating has the effects of ultra-self-cleaning and anti-corrosion on the metal surface. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of coating, which involves mixing primer, curing agent (A), polysilazane resin, and graphene oxide to make composite paint, forming hydrophobic bottom layer from composite paint on surface of substrate and forming hydrophobic surface layer by surface layer coating containing hydrophobically modified nano-silica on hydrophobic bottom layer.