采用多种分析方法对1420铝锂合金表面氧化膜进行了分析. 结果表明合金表面富集了元素Li和Mg, 且表面主要为由Li和Mg的氧化物组成的疏松氧化膜, 其厚度约为 0.05 mm. 合金表面氧化膜的形成与温度密切相关, 氧化膜从300℃开始形成速度较快, 40 0℃以上迅速扩展并形成连续的氧化膜, 且氧化膜的形貌发生明显变化.
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