▎ 摘　　要

NOVELTY - A rare earth element-nickel-molybdenum/graphene oxide nanocomposite depositing liquid comprises 0.25-5 g graphene oxide, 45-55 g nickel sulfate, 4-10 g sodium molybdate, 55-65 g trisodium citrate, 0.2 g sodium lauryl sulfate, 0.1-5 g rare earth element, and balance amount of distilled water. USE - The rare earth element-nickel-molybdenum/graphene oxide nanocomposite depositing liquid is useful in low-carbon steel surface (claimed). ADVANTAGE - The rare earth element-nickel-molybdenum/graphene oxide nanocomposite depositing liquid provides excellent hardness to low-carbon steel surface, and has excellent wear resistance and breaking strength. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of rare earth element-nickel-molybdenum/graphene oxide nanocomposite depositing liquid; and (2) application of rare earth element-nickel-molybdenum/graphene oxide nanocomposite depositing liquid in low-carbon steel surface.