▎ 摘　　要

NOVELTY - Method for coating, involves (a) coating coated surface of aluminum material product using a primer coating solution containing 0.3-2 wt.% graphene and silica particles, and (b) coating using a silica coating solution containing silica sol, silane, oxide and 0.5-3 wt.% cellulose nanofibers in a solvent, where surface defects are reduced. USE - The method is useful for coating for preventing corrosion of aluminum materials used for forming cookware. ADVANTAGE - The method blocks the inflow of caustic agent because the strength is enhanced, improves the surface properties, and forms smooth surface coating layer with low surface roughness. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a cookware made of aluminum with improved corrosion, comprising aluminum substrates, a primer coating layer formed on the aluminum substrate from a coating solution containing silica precursor having an average diameter of 10 nm or less in particle size and 0.3-2 wt.% graphene, and a ceramic coating layer formed on the primer coating layer from the above-mentioned silica coating solution.