Immersion corrosion test of 1420 aluminum- lithium alloy was carried out in EXCO solution; corrosion depth data was obtained; statistical study of corrosion depth was carried out based on the data. The results showed that the corrosion depth obeys Gumbel distribution, Normal distribution, Weibull distribution and Log-Normal distribution. The kinetics laws of corrosion were established according to the corrosion depths data. The kinetics laws showed that the corrosion behavior can be divided into two stages. In the earlier stage, corrosion rate is slower, in the later stage, corrosion rate is faster. During the two stages the kinetics law of 1420 aluminum-lithium alloy corrosion behavior in EXCO solution approximately follows a linear law.%进行了1420铝锂合金在EXCO溶液中浸泡腐蚀试验,得到不同腐蚀周期的腐蚀深度数据,对腐蚀深度数据分布规律进行了研究.结果表明其服从Gumbel分布、正态分布、Weibull分布和对数正态分布.根据试验数据建立了1420铝锂合金的腐蚀动力学规律方程,结果表明,腐蚀深度发展分为2个阶段,在浸泡前期腐蚀较慢,浸泡后期腐蚀较快,2个阶段都近似遵循线性规律.
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