| 引用本文: | 翟文杰,朱宝全,刘莲芳.典型介质中7A04微弧氧化膜的摩擦电化学行为[J].材料科学与工艺,2010,18(3):373-377.DOI:10.11951/j.issn.1005-0299.20100317. |
| ZHAI Wen-jie,ZHU Bao-quan,LIU Lian-fang.Tribo-electrochemical characteristics of 7A04 micro-arc oxidation films in typical solutions[J].Materials Science and Technology,2010,18(3):373-377.DOI:10.11951/j.issn.1005-0299.20100317. |
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| 摘要: |
| 为研究7A04铝合金微弧氧化膜在典型介质中的耐磨性与耐腐蚀性,制作了处理时间为1、1.5、2h的7A04微弧氧化膜.利用SiC作配副,在全程变向式摩擦磨损试验机上获得了对应的摩擦系数,并采用三电极体系,在3种典型的腐蚀性介质0.3mol/L的H2SO4溶液、质量分数3.5%的NaCl溶液和质量分数3.5%的NaOH溶液中,通过摩擦电化学特性曲线,研究了不同试件在相同润滑条件下对摩擦系数和电化学参数的影响.通过比较试件的X射线衍射谱及SEM形貌分析了7A04表面层磨损的原因.结果表明,微弧氧化膜的耐磨性能、减摩性能显著优于未处理的基体材料,并随处理时间的增加而增强;膜层中α-Al2O3相含量、膜层结构及其耐腐蚀性和耐磨性都与处理时间密切相关. |
| 关键词: 7A04合金 摩擦电化学行为 微弧氧化膜 |
| DOI：10.11951/j.issn.1005-0299.20100317 |
| 分类号:TG174.451 |
| 基金项目:国家自然科学基金资助项目(509750587) |
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| Tribo-electrochemical characteristics of 7A04 micro-arc oxidation films in typical solutions |
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ZHAI Wen-jie, ZHU Bao-quan, LIU Lian-fang
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School of Mechatronics Engineering,Harbin Institute of Technology,Harbin 150001,China
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| Abstract: |
| In order to study the tribo-electrochemical characteristics of microarc oxidation(MAO) coating on 7A04 alloy,the micro-arc oxidation samples were prepared at different treating time of 1,1.5 h and 2 h respectively.The tribo-electrochemical performance of the modification layers rubbing with SiC abrasive papers in the typical corrosive media of acid,alkali,saline solutions was investigated respectively on a translational pin-on-disc friction tester,combining with the three-electrode electrochemical methods.The influence on friction coefficient,electrochemical performance parameters,and wear characteristics of different samples was studied through corresponding dynamic tribo-electrochemical curves and SEM analysis of worn surfaces.Results show that micro-arc oxidation coatings have better anti-wear capability and anti-corrosion capacity than the untreated one in all the test solutions.The corrosion resistance is increased with the treating time.This characteristics is related to the surface structure and the contents of α-Al2O3. |
| Key words: 7A04 alloy tribo-electrochemistry micro-arc oxidation coating |
