Al-Zn-Mg-Cu系铝合金抗剥落腐蚀性能研究  

Studyon Exfoliation Corrosion Resistance of Al-Zn-Mg-Cu Aluminum Alloy

作　　者：杨弋[1] 陈忠家[1] 周如[1] 张志[1] 

机构地区：[1]合肥工业大学材料科学与工程学院,安徽合肥230009

出　　处：《金属功能材料》2013年第3期6-11,共6页Metallic Functional Materials

基　　金：国家自然科学基金资助项目(10702018);国家自然科学基金重点项目(51135004)

摘　　要：通过观察经剥落腐蚀试验的Al-Zn-Mg-Cu系铝合金试样显微组织,研究了不同成分、热处理及轧制工艺对Al-Zn-Mg-Cu系铝合金的抗剥落腐蚀(EC)性能的影响。结果表明,添加稀土元素Ce的试样抗剥蚀性能低于未添加的合金试样;经过回归再时效处理(RRA)的合金试样抗剥蚀性能优于峰值时效(T6)的合金试样;随着成品冷轧总压下率的增加,合金抗剥蚀性能呈先下降再略上升的趋势,其中10%的成品冷轧总压下率的合金试样抗剥蚀性能最优。The microstructures of A1-Zn-Mg-Cu aluminum alloy samples after exfoliation corrosion （EXCO） were observed to investigate the effects of composition, heat treatment and rolling on the exfoliation corrosion resistance of AI-Zn-Mg-Cu aluminum alloy. The results show that EXCO resistance of the sample with Ce element is lower than that without Ce. Compared with the peak aging treatment, EXCO resistance of the sample through retrogression and reageing （RRA） is bettel：. With increasing total cold processing ratio of finished goods, EXCO resistance first decreases and then increases slightly, and the sample with 10% total cold processing ratio has the best EXCO resistancg

关 键 词：AL-ZN-MG-CU系铝合金 稀土Ce 热处理 轧制工艺 抗剥落腐蚀性能 

分 类 号：TG174.3[金属学及工艺—金属表面处理]