一种使用极性非质子有机溶剂制备铝镁合金的方法，属于冶金技术领域，本发明方法工艺步骤为：(1)在室温下，首先将铝盐和镁盐溶于有机溶剂中，搅拌得到均一流动性好的电解液；(2)以铜片作为阴极，控制体系的温度在25～80℃，电解电压范围‑1.2～‑1.8V vs Al，进行电解；(3)电解结束后取出阴极，得到沉积在其表面的铝镁合金。本发明方法可以在室温环境下得到铝镁合金，降低生产能耗，同时所采用的原料为无机盐，安全系数高，价格相对便宜，降低生产的成本，方法简单，容易操作。
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