Graphene (G) is a new type of two-dimensional layered structure carbon material, which has high aspect ratio, good thermal conductivity, excellent hydrophobic property, electrical conductivity and chemical stability, so it has a wide application prospect in anti-corrosion coatings. The transmission tower usually uses galvanized steel as base material and achieved good anti-corrosion effect. In recent years, with the increase of air pollution, especially in the industrial atmospheric corrosion zone and the coastal marine atmospheric corrosion zone, due to the coupling effect of acid rain (the main component is nitrogen oxide and sulfur oxides) and corrosive chloride ion, galvanized corrosion failure and even corrosion perforation phenomenon have a serious impact on national power grid security and stability of transmission. The author mainly introduced the corrosion protection mechanism of the functional coatings research team of the key laboratory of marine new materials and applied technology. We also glad to share the construction experience of coating. The marine functional materials team guided by professor Wang has achieved important research findings on G based heavy duty coatings, including the efficient physical dispersion technology of G, the corrosion barrier mechanism of G, and the environmental adaptability evaluation of G coating. Through laboratory test and factory test, the new material, G, has been first applied to the corrosion prevention of the transmission tower in the national power grid. We obtained good protective effect on transmission tower.