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中国腐蚀与防护学报  2008, Vol. 28 Issue (6期): 345-350    
  研究报告 本期目录 | 过刊浏览 |
铝合金在NaHSO3溶液中干湿周浸腐蚀行为
周和荣1;3;李晓刚1;2;董超芳1;马 坚3;陆启凯3;冯 皓3
1.北京科技大学材料学院腐蚀与防护中心  北京  100083
2.北京科技大学 北京市腐蚀、磨蚀与表面技术重点实验室  北京  100083
3.中国电器科学研究院 工业产品环境适应性国家重点实验室  广州  510063
CORROSION BEHAVIOR OF ALUMINIUM ALLOYS AFTER CYCLIC WET-DRY IMMERSION TEST IN 0.02 mol/L NaHSO3 SOLUTION
ZHOU Herong1;3;LI Xiaogang1;2;DONG Chaofang1;MA Jian3;LU Qikai3;FENG Hao3
1.Corrosion and Protection Center;University of Science and Technology Beijing; Beijing 100083
2.Beijing Key Laboratory for Corrosion; Erosion and Surface Technology; University of  Science and  Technology Beijing; Beijing 100083
3.State Key Laboratory of Environmental Adaption  for Industrial Products; China National Electric Apparatus Research Institute; Guangzhou 510063
全文: PDF(1324 KB)  
摘要: 

采用干湿周浸实验、失重法和电化学阻抗谱研究了铝合金1060、2A12和7A04在0.02 mol/L NaHSO3溶液中的腐蚀行为与规律,用扫描电镜(SEM)观察腐蚀产物形貌,并用能谱仪(EDX)和光电子能谱仪(XPS)分析其组成,并测试力学性能。研究表明,随腐蚀时间的延长,铝合金表面的腐蚀产物不断增多,失重增加,力学性能下降;腐蚀产物形貌以团状为主,并不断向外延伸,呈现不均匀的凹凸形貌;腐蚀产物主要为A12O3和A1的硫酸盐水合物;电化学阻抗谱拟合结果显示,腐蚀速率先增加后降低,腐蚀时间为360 h时腐蚀速率达到最大值;耐蚀性能由强至弱依次为1060,2A12,7A04铝合金。

关键词 铝合金干湿周浸失重法电化学阻抗谱    
Abstract

The corrosion behaviors of aluminium alloys 1060,2A12 and 7A04 under cyclic wet-dry immersion conditions have been investigated in 0.02 mol/L sodium sulfite solution by the mass loss method and electrochemical impedance spectroscopy (EIS). Scanning electron microscopy (SEM) was used to observe the surface morphology;  energy dispersive X-ray detector (EDX) and X-ray photoelectron spectroscopy (XPS) were employed to analyze the corrosion products. We also tested the mechanical capability of experimental materials. The results showed that corrosion product was increasing with testing hours prolonging, mass loss adding, strength and elongation percentage declining. Surface observation revealed that corrosion product was agglomerated and accidented, extending forth. The main corrosion product is alumina and aluminium sulfate hydrate. The results of EIS indicated that corrosion rate is highest in 360 hour. Corrosion resistance of aluminium 1060 was best in 0.02 mol/L sodium sulfite solution, but that of aluminium alloy 7A04 was worst.

Key wordsaluminium alloys    cyclic wet-dry immersion test    mass loss method    EIS
收稿日期: 2007-03-28     
ZTFLH: 

TG172

 
基金资助:

国家自然科学基金项目(50499331)

通讯作者: 周和荣 zhouhr_9@163.com   
Corresponding author: ZHOU Herong   

引用本文:

周和荣 李晓刚 董超芳 马 坚 陆启凯 冯 皓. 铝合金在NaHSO3溶液中干湿周浸腐蚀行为[J]. 中国腐蚀与防护学报, 2008, 28(6期): 345-350.
ZHOU He-Rong. CORROSION BEHAVIOR OF ALUMINIUM ALLOYS AFTER CYCLIC WET-DRY IMMERSION TEST IN 0.02 mol/L NaHSO3 SOLUTION. J Chin Soc Corr Pro, 2008, 28(6期): 345-350.

链接本文:

https://www.jcscp.org/CN/      或      https://www.jcscp.org/CN/Y2008/V28/I6期/345

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