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陈宏,黄杰,陈永楠,郝建民,丁业立.AZ91D镁合金外加电场下自封孔微弧氧化膜层微观形貌及耐蚀性的研究[J].稀有金属材料与工程(英文),2017,46(10):3098~3104.[Chen Hong,Huang Jie,Chen Yongnan,Hao Jianmin and Ding Yeli.The Research on Microstructure and Corrosion Resistance of Applied Electricity with Self-sealing and Micro-arc Oxidation Coatings of AZ91D Magnesium Alloys[J].Rare Metal Materials and Engineering,2017,46(10):3098~3104.]
The Research on Microstructure and Corrosion Resistance of Applied Electricity with Self-sealing and Micro-arc Oxidation Coatings of AZ91D Magnesium Alloys
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Received:August 12, 2016  Revised:December 15, 2016
DOI:
Key words: Magnesium alloy  Micro-arc oxidation  Corrosion resistance  Self-sealing
Foundation item:国家自然科学基金资助(项目号51301022),陕西省自然科学基金(项目号2016JQ5032)
Author NameAffiliation
Chen Hong,Huang Jie,Chen Yongnan,Hao Jianmin and Ding Yeli  
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Abstract:
      Metal surface corrosion and wear can be improved by micro-arc oxidation. The micro-arc oxidation coatings commonly exhibited porous structure, which is considered to be main reason for failure of corrosion resistance and high temperature oxidation resistance. Arsing of that, in this paper, the corrosion resistant properties of micro-arc oxidated coatings was improved by self-sealing microstructure through an applied electric field. The relationship between the porous structure of the oxidation coatings and corrosion was investgated by microstructure anylisis. Meanwhile, regularity relations of colloid motion-potential-porous structure during sealing process was discussed and the corrosion resistance of the coatings after self-sealing was evaluated by electrochemical corrosion test. The main results showed that the porous structure of the coatings is the channel corrosive medium, and corrosion resistance can be improved by the self-sealing. In addition, corrosion resistance exhibited significant dependence on porosity, composition and morphology of sealings. It is known from this paper, the corrosion resistance can be improved by self-sealing microstructure obtained by applied electric field.
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