Since graphene was discovered by Geim in 2004 [1],it has been widely investigated in a number of fields due to its excellent properties,such as high electronic conductivity and chemical stability.Some studies have demonstrated that graphene coated onto metal surfaces was an excellent barrier to oxygen diffusion,which is able to protect the metals from environmental oxidation.But there are seldom studies on depositing GO/silane coatings to protect metals from corrosion,especially on aluminum alloy [2-3].