▎ 摘　　要

NOVELTY - A coated strip or sheet comprises a steel strip or sheet, a zinc or zinc alloy coating on the steel strip or sheet, a coating system comprising a corrosion inhibitive composition for inhibiting corrosion, and a top coat. The corrosion inhibitive composition comprises graphene and graphene stacks coupled with coupling agent. The graphene stacks comprises 2-20 layers of graphene. USE - Coated strip or sheet (claimed). ADVANTAGE - The coated strip or sheet has excellent corrosion inhibition effect, has reduced coating weight and is prepared economically. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the preparation of corrosion inhibitive composition, which involves subjecting a mixture of water and a graphene precursor to at least two mechanical treatments and to a chemical treatment to form graphene and graphene stacks, separating the obtained graphene and the graphene stacks from the treated composition to form a graphene-based composition, mixing the graphene-based composition with a coupling agent (A) capable of reacting with graphene and the graphene stacks, and mixing the graphene-based composition with corrosion inhibitors intercalated between the graphene layers of the graphene stack to form intercalated graphene compound.