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中国腐蚀与防护学报  2010, Vol. 30 Issue (1): 25-28    
  研究报告 本期目录 | 过刊浏览 |
LY12铝合 金NaOH介质电解着色膜耐蚀性的电化学评价
唐子龙1;2;刘哲1  
1. 天津大学材料科学与工程学院 天津 300072
2. 天津大学 天津市材料复合与功能化重点实验室 天津 300072
ELECTROCHEMICAL ELEVATION OF CORROSION RESISTANCE OF OLIVE-GREEN FILM ON LY12 Al ALLOY PREPARED IN NaOH
TANG Zilong1;2; LIU Zhe1
1.School of Materials Science and Engineering; Tianjin University; Tianjin 300072
2.Tianjin Key Laboratory of Composite and Functional Materials; Tianjin University; Tianjin 300072
全文: PDF(1135 KB)  
摘要: 

在弱碱性介质中阳极氧化制备LY12铝合金着色膜,用动电位扫描法极化曲线和极化电阻电化学测试技术方法研究了着色膜在中性和酸性介质中的耐蚀性能以及时效腐蚀行为。结果表明,着色膜在中性和酸性介质中均具有良好的钝化性能,耐孔蚀性能也显著提高。结合 X射线衍射、表面形貌和电子能谱探讨橄榄绿色膜层的成分和结构对其耐蚀性能的影响。研究表明,着色膜的厚度约为4 μm,主要由刚玉结构的α-Al2O3构成,膜内富集氧和其它耐蚀元素有利于耐蚀性的提高。

关键词 着色膜伪装色耐蚀性能电化学评价构效关系    
Abstract

Corrosion performance of olive green film on LY12 Al alloy, prepared electrolytically in 0.2 mol/L NaOH at room temperature, is evaluated by electrochemical techniques including dynamical potential anodic polarization curve and polarization resistance. Good passivity of the color film in both acid and neural media and pitting resistance are demonstrated according to the results. Moreover, the color film also shows good long-term corrosion resistance in various aggressive corrosion solutions. The structure, composition and morphology of the color film are analyzed with the help of X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The color film, a little more 4 μm in thickness, is mainly composed by α-alumina based on XRD. The enrichment of O and other corrosion-resistance elements inside film benefits the corrosion performance of LY12 alloy, also helps the stabilization of film color.

Key wordscolor film    stealth color    corrosion resistance    electrochemical evaluation    structure analysis
收稿日期: 2008-06-04     
ZTFLH: 

TG174

 
基金资助:

国家自然科学基金项目(50671072)资助

通讯作者: 唐子龙     E-mail: zlt633@gmail.com
Corresponding author: TANG Zilong     E-mail: zlt633@gmail.com
作者简介: 唐子龙,男,1968年生,副教授,研究方向为腐蚀信息学和腐蚀电化学

引用本文:

唐子龙;刘哲. LY12铝合 金NaOH介质电解着色膜耐蚀性的电化学评价[J]. 中国腐蚀与防护学报, 2010, 30(1): 25-28.
TANG Zi-Long. ELECTROCHEMICAL ELEVATION OF CORROSION RESISTANCE OF OLIVE-GREEN FILM ON LY12 Al ALLOY PREPARED IN NaOH. J Chin Soc Corr Pro, 2010, 30(1): 25-28.

链接本文:

https://www.jcscp.org/CN/      或      https://www.jcscp.org/CN/Y2010/V30/I1/25

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