Study on metal corrosion protection mechanism of graphene nano coating Xuelian Bai, Bin Wu, Kun Jiang, Feng Zhang, Hua Zhang, Chengjun Liu and Meijing Cai E3S Web Conf., 213 (2020) 02018 Published online: 01 December 2020 DOI: 10.1051/e3sconf/202021302018