▎ 摘　　要

NOVELTY - A graphene-coated steel sheet comprises a steel sheet coated with a coating composition comprising an alkyl-reduced graphene oxide, a binder and a solvent. The alkyl-reduced graphene oxide is a reduction product of graphene oxide and 5-19C alkylamine. USE - Graphene-coated steel sheet (claimed). ADVANTAGE - The graphene-coated steel sheet is efficiently formed using graphene oxide having excellent dispersibility in non-polar solvent or solvent having weak polarity. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for manufacture of graphene-coated steel sheet, which involves heating the graphene oxide to 90 degrees C in dimethylformamide for 48 hours, reducing the graphene oxide with an alkylamine to obtain an alkyl-reduced graphene oxide, dispersing the alkyl-reduced graphene oxide in a binder and a solvent to obtain the coating composition, and applying the coating composition on a steel sheet, and drying.