Method for uniformly electroplating aluminum coating on surface of middle frame of mobile phone

The invention belongs to the technical field of mobile phone shell surface treatment, and discloses a method for uniformly electroplating an aluminum coating on the surface of a mobile phone middle frame, which comprises the following steps of: 1, polishing an ADC12 die-casting aluminum alloy mobile phone middle frame by using abrasive paper, and cleaning; step 2, using an ionic liquid (AlCl3-EMIC) prepared by using anhydrous aluminum chloride (AlCl3) and 1-ethyl-3-methylimidazole chloride (EMIC) 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; step 3, performing electroplating by taking AlCl3-EMIC ionic liquid as electroplating liquid, taking the activated die-casting aluminum mobile phone middle frame as a cathode and taking a high-purity Al plate or a conformal anode aluminum frame as an anode; and 4, wiping the residual ionic liquid on the surface of the sample, rinsing with absolute eth