时效工艺对7020铝合金抗剥落腐蚀性能的影响

Research and Application of Materials Science Pub Date : 2019-07-22 DOI:10.33142/msra.v1i1.1286

舜明杨, 岗王, 元开程

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引用次数: 0

摘要

采用电导率测试、剥落腐蚀试验研究了4种不同时效制度对7020铝合金抗剥落腐蚀性能的影响。观察试样表面腐蚀形貌随浸泡时间延长的变化，结果表明：7020铝合金的抗剥落腐蚀性能强弱为：停放3天+145℃×16h>停放3天+90℃×8h+130×16h>停放1天+145℃×16h>自然时效；合金的电导率与其抗剥落腐蚀性能呈正相关；晶界处粗大不连续的η相和较宽的无沉淀析出带有利于抗剥落腐蚀性能的提高。

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