▎ 摘　　要

NOVELTY - Coating of iron substrate involves dispersing 0.01-10 wt.% graphene oxide powder in aqueous dispersion, obtaining graphene oxide solution, adjusting pH of solution to 6-8, and forming graphene oxide thin film on ozone-treated iron substrate containing 95-100 wt.% iron, by spin-coating the obtained solution at 100-3000 rpm for 30-120 seconds. USE - Coating of iron substrate (claimed). ADVANTAGE - The iron substrate coated using graphene oxide solution has excellent corrosion resistance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method improving corrosion resistance of iron substrate.