Defect-free monolayer graphene with excellent shielding performance is impermeable to O₂ and H₂O molecules, which can protect metal against corrosion and hence is considered to be the thinnest known coating for corrosion protection. Based on the great potential of graphene in the field of metal corrosion protection, this paper systematically summarizes the graphene anticorrosion films, graphene/organic anticorrosion coatings and graphene-conductive polymer/organic anticorrosion coatings. The existing problems of graphene anticorrosion films and well-dispersed graphene in polymer coatings are also discussed. Finally, the future development of graphene based anticorrosion coatings is prospected.

Contents
1 Introduction
2 Graphene anticorrosion films
3 Graphene/organic anticorrosion coatings
4 Graphene-conductive polymer/organic anticorrosion coatings
5 Summary and outlook