Large-area preparation of defect-repaired fluorocarbon polymer coatings on graphene for long-term corrosion resistance

The corrosion-resistant hybrid films based on fluorocarbon polymer and single layer graphene were prepared. The hydrophobic fluorocarbon film covered the defect on graphene coated Cu, which inhibited the direct corrosion at the defect site, and forbade the galvanic corrosion between graphene and Cu substrate. The results confirmed that the hybrid coatings showed much better anti-corrosion performance. Electrochemical impedance spectroscopy measurements revealed that the hybrid coatings provided an effective physical barrier against the corrosive medium. The finding here is critical in designing hybrid protective coatings with the defect-repaired structure on the graphene coated Cu.