| 8090Al-Li合金晶间腐蚀与剥落腐蚀性能研究 |
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| 引用本文： | 张匀,刘玉林,赵洪恩,胡壮麒,朱自勇,王政富.8090Al-Li合金晶间腐蚀与剥落腐蚀性能研究[J].金属学报,1991,27(4):127-133. |
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| 作者姓名： | 张匀 刘玉林 赵洪恩 胡壮麒 朱自勇 王政富 |
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| 作者单位： | 中国科学院金属研究所，中国科学院金属研究所，中国科学院金属研究所，中国科学院金属研究所，中国科学院金属腐蚀与防护研究所，中国科学院金属腐蚀与防护研究所 |
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| 基金项目： | 中国科学院腐蚀科学开放实验室资助 |
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| 摘 要： | 本文研究了8090Al—Li合金的点蚀、晶间腐蚀和剥落腐蚀性能,探讨了热处理制度对耐腐蚀性能的影响。结果表明:Al-2.79Li-1.3Cu-0.7Mg-0.12Zr合金自然时效态抗晶间腐蚀和剥落腐蚀性能最佳,峰时效状态耐腐蚀性能最差,欠时效比过时效略好。显微组织观察表明合金的耐蚀性能与显微组织密切相关,峰时效条件下,粗大T_2相连续分布于晶界上,它的电位比基体电位低因此晶界构成阳极通道,从而使合金耐蚀性能恶化。
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| 关 键 词： | Al-Li合金 点蚀 晶间腐蚀 剥落腐蚀 |
| 收稿时间： | 1991-04-18 |
| 修稿时间： | 1991-04-18 |
INTERGRANULAR AND EXFOLIATION CORROSION BEHAVIOUR OF 8090Al-Li ALLOY |
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| ZHANG Yun,LIU Yulin,ZHAO Hong''''en,HU Zhuangqi Institute of Metal Research,Academia Sinica,Shenyang,ZHU Ziyong,WANG Zhengfu Institute of Corrosion and Protection of Metals,Academia Sinica,Shenyang.INTERGRANULAR AND EXFOLIATION CORROSION BEHAVIOUR OF 8090Al-Li ALLOY[J].Acta Metallurgica Sinica,1991,27(4):127-133. |
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| Authors: | ZHANG Yun LIU Yulin ZHAO Hong'en HU Zhuangqi Institute of Metal Research Academia Sinica Shenyang ZHU Ziyong WANG Zhengfu Institute of Corrosion and Protection of Metals Academia Sinica Shenyang |
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| Abstract: | The Al-2.79Li-1.3Cu-0.7Mg-0.12Zr(8090 Al-Li) alloy has excellent re-
sistance to intergranular and exfoliation corrosion as naturally aged, worst as peak
aged and rather better as underaged than as overaged. The corrosion behaviour of
the alloy is closely dependent on its microstructure. Under the peak aging condition,
the coarse T_2 phase, which is continuously distributed along grain boundary, has so
low corrosion potential in comparison with matrix, that makes the corrosion resis-
tance of the alloy to be deteriorated by anodic dissolution along grain boundary. |
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| Keywords: | Al-Li alloy pit corrosion intergranular corrosion resistance exfoliation behaviour |
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