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研究了ＬＹ１２ＣＺ铝合金在ＥＸＣＯ溶液中的自腐蚀电位和最大腐蚀深度随浸泡时间的变化关系。结果表明、ＬＹ１２ＣＺ铝合金在ＥＸＣＯ溶液中的腐蚀动力学可分为两个阶段：浸泡前期，腐蚀发展较快，但腐蚀动力学的规律性不明显；浸泡后期，腐蚀发展稍慢，腐蚀动力学近似地遵循线性规律。其自腐蚀电位的变化经历了一个先正后负的过程，浸泡前其自腐蚀电位随浸泡时间的延长而正移；浸泡后期自腐蚀电位随浸泡时间的延长而近似地按指数规律负移。自腐蚀电位和最大腐蚀度之间存在着对应关系，通过自腐蚀电位的测量，可以推测最大腐蚀深度，从而能比较有效地预测ＬＹ１２ＣＺ铝合金在ＥＸＣＯ溶液中的腐蚀损伤。
The relationship between the corrosion potential and the maximum corrosion depth of LY12CZ aluminum alloy in EXCO solution with the immersion time was studied. The results show that the corrosion kinetics of LY12CZ aluminum alloy in EXCO solution can be divided into two stages: the early stage of soaking, the corrosion develops rapidly, but the regularity of the corrosion kinetics is not obvious; in the late stage of soaking, the corrosion development is a little slower and the corrosion kinetics Approximately follow the linear law. The change of self-corrosion potential undergoes a positive first and then negative process. The self-corrosion potential before immersion is positive with the leaching time. The self-corrosion potential in the late immersion phase is approximately negative exponentially with the leaching time. The relationship between corrosion potential and maximum corrosion potential exists. By measuring the corrosion potential, the maximum corrosion depth can be estimated, which can effectively predict the corrosion damage of LY12CZ aluminum alloy in EXCO solution.