研究了轧制态及峰时效8090铝-锂合金、拉应力作用下及无应力作用时双级过时效7075铝合金的剥蚀发展过程，测量并拟合了合金发生剥蚀后的电化学阻抗谱。结果表明：发生剥蚀后，合金电化学阻抗谱由高一中频和中一低频容抗弧组成；可从电化学阻抗谱的拟合参数（变化趋势）得到剥蚀的相关信息，如剥蚀发展速度、剥蚀形貌、剥蚀表层是否脱落等。
The exfoliation development of 8090 Al - Li alloy and 7050 Al alloy was studied.The electrochemical impedance spectroscopy(EIS) of these alloys in EXCO solution was measured and simulated .At the beginning of immersion, the EIS is comprised by a capacitive arc at high - mediate frequency and an inductive arc at mediate - low frequency. Once exfoliation occurs, two capacitive arcs appear at high - mediate frequency and mediate - low frequency respectively.Some information about exfoliation, such as exfoliation development rate and exfoliation morphology, can be obtained through the simulated EIS data.
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