(西安理工大学 材料科学与工程学院，西安 710048)
摘 要: 针对铝、镁合金微弧氧化技术应用开发中存在的溶质元素作用机理不明、电量消耗与陶瓷层增厚关系机制不清、所得陶瓷层性能尚不能满足苛刻环境下的耐蚀性要求等应用瓶颈，结合已有的试验结果，分析了微弧氧化陶瓷层形成和增厚过程中溶质元素的作用机制，探讨了通过溶液体系增加沉积层阻抗和依据等通量变换原理增大峰值电流两条途径缩短起弧时间以降低电量消耗的可能方法，提出了利用陶瓷层表面均布盲性微孔的形貌特征，制备有机−无机复合涂层的研究思想，以期为铝、镁合金微弧氧化处理的技术进步起到促进作用。
关键字: 铝、镁合金；微弧氧化；微弧电泳；复合涂层
（School of Materials Science and Engineering, Xi’an University of Technology, Xi’an 710048, China）
Abstract:The development of and application of micro-arc oxidation (MAO) technology of aluminum and magnesium alloy were severely restricted by unknown mechanism of function of solute elements, unclear relationship between power consumption and ceramic coating thickness and undesirable resistance of the coating to harsh corrosive environment. The solute elements during MAO coating formation and growth was analyzed based on the previous experimental data. A possible way to lower power consumption by shortening arcing time was proposed and discussed, which can be carried out by increasing the deposited layer impedance using optimum electrolyte systems and promoting the peak current based on an isoflux transformation principle. An organic-inorganic duplex layers design was proposed to fabricate organic layer on the top blind micropores surface of MAO coating, with the purpose of promoting the coating performances and improving the MAO technical advance of Al and Mg alloys.
Key words: aluminum and magnesium alloy; micro-arc oxidation; micro-arc electrophoresis; duplex coatings
