▎ 摘　　要

NOVELTY - Composition comprises composite powder; the composite powder includes graphene and graphene oxide in the mass ratio of (20-100):(1-30). USE - The composition is useful for electrophoretic pretreatment coating for preparing electrophoretic coating (all claimed). ADVANTAGE - The coating: has excellent anti-corrosion performance, aging resistance and high adhesion. The pretreatment coating: can further improves the anti-corrosion performance and aging resistance of electrophoretic coating film, and material is environmentally friendly; and is simple to prepare. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for: Preparing the composition comprising mixing composite powder, binder and solvent to obtain the composition for electrophoretic pretreatment coating. Electrophoretic pretreatment coating, comprising the composition. Electrophoretic coating comprises the composition and/or electrophoretic pretreatment coating.