Fabrication of Superhydrophobic Nickel‐Reduced Graphene Oxide Coating with Corrosion Resistance in High‐Temperature and High‐Pressure CO2 Environment

A novel superhydrophobic nickel‐reduced graphene oxide (sNi‐rGO) coating is fabricated successfully on an N80 steel substrate using a simple electrodeposition method combined with a directly elevated current approach. The results show that the water contact angle (WCA) of the coating is 162.87° when the concentration of graphene oxide (GO) is 0.6 g L −1 . The autoclave experiments indicate that the coatings still maintain superhydrophobic and corrosion resistance under high‐temperature and high‐pressure CO 2 condition. The density functional theory calculations are employed to investigate the adsorption models of carbonate (CO 3 2− ) on the surfaces of iron (Fe), nickel (Ni), and rGO to further verify the CO 2 corrosion resistance mechanism of the sNi‐rGO coating.