▎ 摘　　要

NOVELTY - Composite coating comprises nickel, graphene and chromium, where nickel is used as metal matrix binder, and graphene and chromium are used as reinforcing particles. USE - Composite coating. ADVANTAGE - The composite coating increases overall hardness of the composite coating and ensures the stability and safety of electric motion. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing composite coating, which involves preparing electrodeposition solution, placing graphene and chromium into the electrodeposition solution, processing cathode material pretreatment, electrodeposition and testing and characterization.