Anodic oxidation method for electroplating aluminum coating on surface of middle frame of mobile phone

The invention discloses an anodic oxidation method for electroplating an aluminum coating on the surface of a middle frame of a mobile phone, which comprises the following steps of: 1, mechanically polishing an ADC12 die-casting aluminum alloy middle frame of the mobile phone, wet-grinding with abrasive paper, and cleaning; 2, using an ionic liquid prepared by using anhydrous aluminum chloride and chlorinated 1-ethyl-3-methylimidazole as raw materials as an activating solution, using a die-casting aluminum mobile phone middle frame as an anode, and using an aluminum plate as a cathode for activation; 3, the AlCl3-EMIC ionic liquid serves as electroplating liquid, the activated die-casting aluminum mobile phone middle frame serves as a cathode, a high-purity Al plate serves as an anode, and electroplating is conducted; 4, after electroplating is finished, rinsing, ultrasonic drying, shot blasting, ultrasonic treatment and blow-drying are conducted on the plated part; 5, chemical polishing; and 6, the mobile ph