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材料研究学报  2009, Vol. 23 Issue (2): 193-198    
  研究论文 本期目录 | 过刊浏览 |
添加剂对镁合金微弧氧化膜性能的影响
崔作兴1;2;  邵忠财2; 刘志远2; 赵立新3;  田彦文1
1.东北大学材料与冶金学院 沈阳 110004
2.沈阳理工大学环境与化学工程学院 沈阳 110168
3.牡丹江师范学院超硬材料实验室 牡丹江 157012
Effects of additives on properties of ceramic coatings formed by micro-arc oxidation on AZ91D Mg alloy
CUI Zhuoxing1;2;  SHAO Zhongcai2;  LIU Zhiyuan2;  ZHAO Lixin3;  TIAN Yanwen1;
1.School of Materials & Metallurgy; Northeastern University; Shenyang 110004
2.School of Environment and Chemical Engineering; Shenyang Ligong University; Shenyang 110168
3.Key Laboratory for Superhard Materials; Mudanjiang Normal College; Mudanjiang 157012
引用本文:

崔作兴 邵忠财 刘志远 赵立新 田彦文. 添加剂对镁合金微弧氧化膜性能的影响[J]. 材料研究学报, 2009, 23(2): 193-198.
. Effects of additives on properties of ceramic coatings formed by micro-arc oxidation on AZ91D Mg alloy[J]. Chin J Mater Res, 2009, 23(2): 193-198.

全文: PDF(1184 KB)  
摘要: 

在偏铝酸盐--六偏磷酸盐体系中对镁合金进行微弧氧化处理, 研究了金属盐缓蚀剂钨酸盐、多元醇或酸等添加剂对氧化膜性能的影响. 通过正交实验优化和对微弧氧化膜结构、成分及性能的测试评价, 得到了性能较好的微弧氧化电解液配方. SEM检测发现, 复合添加剂(Na2EDTA1g/L, CH3(CH2})11SO3Na0.5g/L)通过抑制破坏性的微弧, 能促进成膜、降低起弧电压, 得到结构更加均匀和完整的陶瓷涂层;XRD检测表明, 膜层的主要成分是MgO、Mg3(PO4)2、MgAl2O4和AlPO4等化合物; 中性盐水腐蚀测试表明,陶瓷膜在48 h内具有较平缓的腐蚀速度; EIS和动电位极化曲线表明,在电解液中加入复合添加剂使镁合金试样微弧氧化膜的耐腐蚀性能得到了很大的提高.

关键词 金属材料镁合金微弧氧化添加剂电化学性能    
Abstract

AZ91D magnesium alloy was treated by micro-arc oxidation (MAO) in electrolyte system including NaAlO2 and (NaPO3)6 in this paper. Effects of tungstate and some other additives on the structure, property and component of the MAO coatings were investigated and the electrolyte subsequently was optimized with the orthogonal experimental design approach. The results show that the composite additives (Na2EDTA1g/L, CH3(CH2)11SO 3Na0.5g/L) could constrain the ruinous micro-arc, which makes the porosity and microarc channel diameter of the coatings and the arcing voltage decrease; the coatings compositions mainly include MgO, Mg3(PO4)2, MgAl2O4 and AlPO4; ceramic coatings exhibited excellent anticorrosion property; the anticorrosion property of the MAO coatings was improved greatly with the composite electrolyte additives.

Key wordsmetallic materials    magnesium alloy    micro-arc oxidation    additive    electrochemistry performance
收稿日期: 2008-12-18     
基金资助:

辽宁省自然科学基金2040189资助项目.

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