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中国腐蚀与防护学报  2005, Vol. 25 Issue (6): 327-331     
  研究报告 本期目录 | 过刊浏览 |
LD7铝合金阳极氧化膜的不同封闭方法耐蚀性评价
田连朋;左禹;赵景茂;熊金平;张晓丰;赵旭辉
北京化工大学 材料科学与工程学院
Evaluation of Sealing Methods on Corrosion Behavior of LD7 Aluminum Alloy Anodic Oxide Films in NaCl Solution
Lianpeng Tian;Yu Zuo;Jingmao Zhao;Jingping Xiong;Xiaofeng Zhang;Xvhui Zhao
北京化工大学 材料科学与工程学院
全文: PDF(146 KB)  
摘要: 研究了不同封闭方法对LD7铝合金阳极氧化膜在NaCl溶液中耐蚀性的影响,包括沸水封闭、氟化镍封闭、重铬酸钾封闭和醋酸镍封闭。利用动电位极化和电化学阻抗能谱(EIS)研究了封闭后阳极氧化膜的腐蚀行为。利用扫描电子显微镜(SEM)观察了封闭后阳极氧化膜的表面形貌。结果表明在酸性溶液和碱性溶液中醋酸镍封闭能提供更高的耐蚀性,而沸水封闭在中性溶液中较耐蚀。工业生产中普遍采用的重铬酸钾封闭对LD7铝合金阳极氧化膜封闭效果并不理想,封闭后的阳极氧化膜在不同pH值的溶液中耐蚀性均不高,氟化镍封闭的阳极氧化膜层耐酸性不强。
关键词 LD7铝合金阳极氧化封闭电化学阻抗谱    
Abstract:Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) were used to study the influences of sealing methods on the corrosion behavior of anodic oxide film on LD7 aluminum alloy in NaCl solution. The anodic oxide films were sealed by the methods of boiling water, nickel fluoride, potassium dichromate and nickel acetate, respectively. The surface morphology was examined by scanning electron microscopy (SEM). The results show that nickel acetate sealed film provides relatively higher corrosion resistance both in acidic and in basic solutions, while boiling water and nickel fluoride sealed films is better in neutral solution. Potassium dichromate sealing method, which is very popular in the industry, could not provide good sealing quality for anodic oxide film on LD7 aluminum alloy in acidic, neutral and basic NaCl solutions.
Key wordsLD7 aluminum alloy    anodizing    sealing    EIS
收稿日期: 2004-06-21     
ZTFLH:  TG174  
通讯作者: 田连朋     E-mail: lianptian@hotmail.com
Corresponding author: Lianpeng Tian     E-mail: lianptian@hotmail.com

引用本文:

田连朋; 左禹; 赵景茂; 熊金平; 张晓丰; 赵旭辉 . LD7铝合金阳极氧化膜的不同封闭方法耐蚀性评价[J]. 中国腐蚀与防护学报, 2005, 25(6): 327-331 .
Lianpeng Tian, Yu Zuo, Jingmao Zhao, Jingping Xiong, Xiaofeng Zhang, Xvhui Zhao. Evaluation of Sealing Methods on Corrosion Behavior of LD7 Aluminum Alloy Anodic Oxide Films in NaCl Solution. J Chin Soc Corr Pro, 2005, 25(6): 327-331 .

链接本文:

https://www.jcscp.org/CN/      或      https://www.jcscp.org/CN/Y2005/V25/I6/327

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