镁合金微弧氧化工艺参数研究

发布时间：2018-02-05 03:17

本文关键词： 镁合金微弧氧化陶瓷膜工艺参数　出处：《表面技术》2017年05期 　论文类型：期刊论文

【摘要】：镁合金是目前最轻的金属,它可以部分替代一些钢铁材料来实现材料的轻量化。而且镁合金具有比强度、比刚度较高,减震性、减噪性、加工性较好等优点,市场对它的需求量也越来越大。但是镁合金的电位很低,易与其他金属发生电偶腐蚀,利用微弧氧化可在镁合金表面制得一层综合性能较好、类似陶瓷层的一种膜层,可大大提高镁合金的耐蚀性、耐磨性及耐高温性,因此微弧氧化技术在镁合金表面处理上得到了较快发展。对此,首先介绍了微弧氧化机理的研究现状,总结了微弧氧化过程的几个主要阶段及其主要作用;其次,重点概述了影响镁合金微弧氧化陶瓷膜制备工艺的主要因素,特别是电参数、电解液及氧化时间等对膜层结构、形貌及性能的影响;最后提出目前镁合金微弧氧化工艺存在的几个主要问题,并对其解决办法及应用前景进行了展望。
[Abstract]:Magnesium alloy is the lightest metal at present, it can partly replace some iron and steel materials to achieve lightweight materials, and magnesium alloys have the advantages of high specific strength, high specific stiffness, shock absorption, noise reduction, good processability and so on. But the potential of magnesium alloy is very low, and it is easy to corrode with other metals. A layer of magnesium alloy can be prepared on the surface of magnesium alloy by micro-arc oxidation. Similar to ceramic coating, the corrosion resistance, wear resistance and high temperature resistance of magnesium alloy can be greatly improved. Therefore, micro-arc oxidation technology has been developed rapidly in magnesium alloy surface treatment. Firstly, the research status of the mechanism of micro-arc oxidation is introduced, and the main stages and functions of the process of micro-arc oxidation are summarized. Secondly, the main factors affecting the preparation process of magnesium alloy micro-arc oxidation ceramic film were summarized, especially the influence of electric parameters, electrolyte and oxidation time on the structure, morphology and properties of the coating. At last, some main problems in the process of microarc oxidation of magnesium alloy are put forward, and its solution and application prospect are prospected.
【作者单位】：长安大学材料科学与工程学院;
【分类号】：TG174.45
【正文快照】： Received:2017-01-10;Revised:2017-02-20镁合金被称为“21世纪最具发展潜力的绿色工程材料”[1],相比于其他金属材料而言,镁合金因其质轻、比强度和比刚度高以及消震性较好等优点,在汽车、电器、计算机、航空、医疗等众多领域均有广泛应用。但耐蚀性差一直是其最严重的缺陷,

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