Environment-friendly wide-temperature aluminum alloy anodic oxidation electrolyte and preparation method and application thereof

The invention belongs to the technical field of metal surface machining, and particularly discloses an environment-friendly wide-temperature aluminum alloy anodic oxidation electrolyte and a preparation method and application thereof. The aluminum alloy anodic oxidation electrolyte comprises an organic complexing agent and rare metal salt. The organic complexing agent comprises an alcohol amine compound; the rare metal salt comprises cerium salt; the aluminum alloy anodic oxidation electrolyte is prepared by mixing all the raw materials. When the aluminum alloy anodic oxidation electrolyte is used for anodizing aluminum alloy, high anodic oxidation current density can be adopted; anodic oxidation is completed within a short anodic oxidation time, an anodic oxidation film layer with excellent mechanical properties and corrosion resistance can still be formed within a wide temperature range of 20-40 DEG C, the critical load is 10.13-15.71 N, the wear rate is 5.4*10-9.52*10 mm/Nm, and the oxidation film