▎ 摘　　要

NOVELTY - Preparing polyethyleneimine-graphene oxide (PEI-GO) chitosan composite membrane on surface of aluminum alloy involves taking aluminum alloy into sodium hydroxide solution, carrying out chemical etching, washing, drying to obtain polyethyleneimine aqueous solution, heating the solution, washing and naturally drying to process aluminum alloy to obtain graphene oxide solution self-assembling in chitosan solution and circulating, taking out solution, washing and drying. USE - Method for preparing polyethyleneimine-graphene oxide (PEI-GO) chitosan composite membrane on surface of aluminum alloy. ADVANTAGE - The method enables to prepare polyethyleneimine-graphene oxide (PEI-GO) chitosan composite membrane on surface of aluminum alloy in simple and cost effective manner which has mild reaction condition, corrosion resistance and good effect.