研究了拉应力对双级过时效(121℃/35 h+160°F/20h)7075铝合金剥蚀的影响及合金在EXCO溶液中的电化学阻抗谱.研究表明,拉应力可显著地促进铝合金剥蚀的发生及发展.浸泡初期,合金电化学阻抗谱由一个高-中频容抗弧及一个中-低频感抗弧组成.合金一旦发生剥蚀,电化学阻抗谱上即出现一个高-中频容抗弧及一个中-低频容抗弧.
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