| 显微组织对铝管腐蚀的影响 |
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| 引用本文： | 王冠,焦会胜.显微组织对铝管腐蚀的影响[J].中国有色金属学会会刊,2011(6):1193-1198. |
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| 作者姓名： | 王冠 焦会胜 |
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| 作者单位： | 广东工业大学机电学院;牛津仪器(上海)有限公司; |
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| 摘 要： | 发现一些管状铝合金通过机械变形弯曲成U形时更容易在弯曲表面发生腐蚀。建立了管状铝合金的水平和弯曲表面的显微组织与腐蚀的关系。通过对含0.08%及0.22%Mn的两种铝合金弯管弯曲部分的显微组织的观察,及在酸性盐水（SWAAT）中的腐蚀形貌及微观电化学反应的研究,发现高Mn铝管在弯曲表面较易发生点蚀,有较低的击穿电压及较高的阴极电流密度。SEM及TEM观察发现此现象的产生与高Mn铝管弯曲处弥散的粒径小于100nm的富含Mn的合金二次相有关。
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| 关 键 词： | 机械冷弯曲 Mn颗粒 管状铝合金 |
Microstructural effects in corrosion of aluminium tube alloys |
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| WANG Guan ,JIAO Hui-sheng.Microstructural effects in corrosion of aluminium tube alloys[J].Transactions of Nonferrous Metals Society of China,2011(6):1193-1198. |
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| Authors: | WANG Guan JIAO Hui-sheng |
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| Affiliation: | WANG Guan 1,JIAO Hui-sheng 2 1. Institute of Mechatronics,Guangdong University of Technology,Guangzhou 510006,China,2. Oxford Instruments (Shanghai) Ltd,Shanghai 201109 |
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| Abstract: | Fine gauge extruded aluminium alloy tubes can experience preferential corrosion and early failure when they are formed into u-bend via cold deformation. The relationship between the electrochemical reactivity and the microstructure of the bent vs straight parts of the tube was established. Investigations were carried out on two alloys containing 0.08% and 0.22% (mass fraction) of manganese. The corrosion morphology of bent tubes after immersion in salt water acetic acid test (SWAAT) solution showed the high... |
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| Keywords: | cold deformation Mn precipitation aluminium tube alloy |
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