| 含钪Al-Zn-Cu-Mg-Zr合金的腐蚀行为和电化学阻抗谱特征 |
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| 引用本文： | 李文斌,潘清林,肖艳苹,何运斌,刘晓艳.含钪Al-Zn-Cu-Mg-Zr合金的腐蚀行为和电化学阻抗谱特征[J].中南大学学报(自然科学版),2011(9). |
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| 作者姓名： | 李文斌 潘清林 肖艳苹 何运斌 刘晓艳 |
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| 作者单位： | 中南大学材料科学与工程学院;湖南城市学院土木工程学院; |
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| 基金项目： | 国家高技术研究发展计划(“863”计划)项目(2006AA03Z523) |
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| 摘 要： | 通过晶间腐蚀、剥落腐蚀和极化曲线试验,结合电化学阻抗谱(EIS)测量,研究不同时效处理对含钪超高强Al-Zn-Cu-Mg-Zr合金的晶间腐蚀和剥落腐蚀敏感性的影响。研究结果表明:在自然时效状态下,合金腐蚀敏感性最大;人工时效处理的合金,其腐蚀敏感性随时效时间的延长而降低,相应时效态合金在EXCO溶液中恒电位极化曲线分析,也得出相同的结论。晶界析出相和晶界无沉淀析出带(PFZ)是影响合金腐蚀性能的主要因素。随着时效时间的延长,η′和S′相逐渐向平衡的η和S相转变,晶界析出相粗化并呈链状分布,PFZ变宽等均有助于降低合金的腐蚀敏感性。合金的电化学阻抗谱(EIS)演变对腐蚀类型的转变具有规律的反映,可以用来对合金的腐蚀性能进行快速、无损的检测。
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| 关 键 词： | 含钪Al-Zn-Cu-Mg-Zr合金 时效处理 晶间腐蚀 剥落腐蚀 电化学阻抗谱 |
Corrosion behaviors and electrochemical impedance spectroscopy features of Al-Zn-Cu-Mg-Zr alloy containing Sc |
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| LI Wen-bin,PAN Qing-lin,XIAO Yan-ping,HE Yun-bin,LIU Xiao-yan.Corrosion behaviors and electrochemical impedance spectroscopy features of Al-Zn-Cu-Mg-Zr alloy containing Sc[J].Journal of Central South University:Science and Technology,2011(9). |
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| Authors: | LI Wen-bin PAN Qing-lin XIAO Yan-ping HE Yun-bin LIU Xiao-yan |
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| Institution: | LI Wen-bin1,2,PAN Qing-lin1,XIAO Yan-ping1,HE Yun-bin1,LIU Xiao-yan1 (1.School of Materials Science and Engineering,Central South University,Changsha 410083,China,2.School of Civil Engineering,Hunan City University,Yiyang 413000,China) |
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| Abstract: | The effects of various aging treatments on intergranular and exfoliation corrosion susceptibility of Al-Zn-Cu-Mg-Zr alloys containing Sc were studied using corrosion tests,polarization curve and electrochemical impedance spectroscopy(EIS).The results show that the naturally aged(NA) alloy has the highest susceptibility of intergranular and exfoliation corrosion and the susceptibility of the alloys in artificial aging treatments decreases with the increase of aging time,which conforms to the relevant polariz... |
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| Keywords: | Al-Zn-Cu-Mg-Zr alloys containing Sc aging treatment intergranular corrosion exfoliation corrosion electrochemical impedance spectroscopy(EIS) |
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