OALib Journal期刊
ISSN: 2333-9721
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NaCl溶液中Al-Li合金腐蚀过程的电化学特征
, PP. 760-764
Keywords: AA2195,T8铝合金,NaCl溶液
Abstract:
采用电化学噪声技术,结合电化学阻抗谱及极化曲线测量,研究了峰时效AA2195-T8铝合金在3.0%NaCl溶液中的腐蚀电化学特征结果表明,腐蚀初期,合金表面钝化膜上不断有孔核的形成与修复,并导致阻抗谱上感抗成分的存在.随腐蚀时间的延长,其感抗成分消失且阻抗模值降低.阳极极化时,由于其孔蚀电位与自腐蚀电位接近,钝化电位区间很小;随腐蚀时间的延长,极化电阻先增加而后减小,自腐蚀电流则呈相反趋势变化.
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