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材料研究学报  2009, Vol. 23 Issue (2): 220-224    
  研究论文 本期目录 | 过刊浏览 |
Mg--Li合金微弧氧化陶瓷膜制备及其耐蚀性能
施玲玲1; 徐用军1.2;  李康1;   姚忠平1;  姜兆华1
1.哈尔滨工业大学化工学院 哈尔滨 150001
2.哈尔滨工程大学超轻材料与表面技术教育部重点实验室 哈尔滨 150001
Corrosion resistance property of micro–arc oxidation coatings on Mg–Li alloy obtained in different systems
SHI Lingling1;  XU Yongjun1;2;  LI Kang1;  YAO Zhongping1;  JIANG Zhaohua1
1.Department of Chemical Engineering; Harbin Institute of Technology; Harbin 150001
2.Key laboratory of super light materials and surface technology; Ministry of Education; Harbin Engineering University; Harbin 150001
引用本文:

施玲玲 徐用军 李康 姚忠平 姜兆华. Mg--Li合金微弧氧化陶瓷膜制备及其耐蚀性能[J]. 材料研究学报, 2009, 23(2): 220-224.
, , . Corrosion resistance property of micro–arc oxidation coatings on Mg–Li alloy obtained in different systems[J]. Chin J Mater Res, 2009, 23(2): 220-224.

全文: PDF(904 KB)  
摘要: 

通过三种优化工艺体系在Mg--5%Li合金表面上生长陶瓷膜层, 分析了膜层的厚度、显微结构、相组成和耐蚀性. 结果表明, 三种膜层都含有MgO相, 微弧氧化试样的耐蚀性能都明显提高. 使用Na3PO4体系制备的膜层含有MgF2, 膜层最厚、表面有大量裂纹; 使用Na2SiO3体系制备的膜层含有橄榄石型Mg2SiO4, 耐点蚀性能最好; 使用Na2SiO3--Na3PO4体系制备的膜层含有MgSiO3, 致密性最好, 膜层耐均匀腐蚀性能最好.

关键词 材料失效与保护Mg--Li合金微弧氧化 陶瓷膜 耐蚀性    
Abstract

Ceramic coatings were prepared on the surface of Mg–5%Li alloy in three kinds of optimized electrolytes by single-polar pulsed micro-arc oxidation (MAO). Thickness, microstructure, phase composition and corrosion resistance of the ceramic coatings were investigated. The results showed that all the MAO coatings were composed of MgO, and their corrosion resistance was improved distinctly. The coating gained in Na3PO4 system contained MgF3, and was the thickest with a great deal of cracks; the coating from Na2SiO3 system included olivine Mg2SiO4, and had the best pitting corrosion resistance; the coating from Na2SiO3–Na3PO4 system contained MgSiO3, showed the most compact micro-surface, and owned the best uniform corrosion resistance.

Key wordsmaterials failure and protection    Mg–Li alloy    micro–arc oxidation    ceramic coatings    corrosion resistance
收稿日期: 2008-08-26     
ZTFLH: 

TG174

 

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