摘要
研究了一种含Sc的Al-Cu-Li-Zr合金在不同时效状态下的晶间腐蚀和剥落腐蚀行为.结果表明:不同时效温度下峰时效态合金的晶间腐蚀和剥落腐蚀倾向随着时效温度的升高而增加;在160℃下时效,合金的晶间腐蚀和剥落腐蚀倾向随着时效时间的延长而增加.含Sc的Al-Cu-Li-Zr合金在EXCO溶液中进行的极化曲线测试结果也表现出相同的腐蚀趋势.微观组织观察分析表明,T1(Al2CuLi)相和无沉淀析出带(PFZ)是引起合金腐蚀敏感性增加的主要因素.
Corrosion behavior of an A1-Cu-Li-Zr alloy containing Sc aged at different regimes was investi-gated. The results show that intergranular corrosion and exfoliation corrosion of Al-Cu-Li-Zr alloy containing Sc were accelerated with increasing the aging temperature for each T6 state or with prolonging the aging time at 160℃,which were in accord with the results of polarization tests in EXCO solution. The T1 phase and PFZ, as the anodes of the alloy, are the key factors, responsible to the corrosion behavior of the alloy.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2007年第6期391-396,共6页
Corrosion Science and Protection Technology
关键词
含sc的铝锂合金
时效
晶间腐蚀
剥落腐蚀
Al-Li alloy containing Sc
aging
intergranular corrosion
exfoliation corrosion
