镁合金微弧氧化工艺参数研究  

Process Parameters of Magnesium Alloys Micro-arc Oxidation

作　　者：陈宏[1] 郭亚欣[1] 宫月[1] 陈永楠[1] 林洪才[1] 

机构地区：[1]长安大学材料科学与工程学院,西安710000

出　　处：《表面技术》2017年第5期34-39,共6页Surface Technology

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。As the lightest metal, magnesium alloy can partly replace some steel materials in achieving light weight. Since magnesium alloy features in high specific strength, specific stiffness, good shock absorption, noise reduction and favorable ma- chinability, it is now increasingly demanded by the market. However, owing to low electric potential, it was easily subject to galvanic corrosion galvanic corrosion with other metals. A ceramic layer-like coating of excellent comprehensive performance could be prepared on the surface of magnesium alloy surface by micro-arc oxidation. In this way, corrosion resistance, wear re- sistance and high-temperature resistance were all greatly improved. Therefore, micro-arc oxidation technology was developed rapidly on surface treatment of magnesium alloy. For this purpose, current research on mechanism of micro-arc oxidation was introduced firstly, several main stages of micro-arc oxidation process and their main functions were summarized; then main fac- tors affecting preparation technology of magnesium alloy micro-arc oxidation ceramic film, especially effects of electrical pa- rameters, electrolyte and oxidation time on the film structure, morphology and performance were elaborated in details; finally several key problems now present in the magnesium alloy micro-arc oxidation process, and solution and even application fore- ground were expected as well.

关 键 词：镁合金 微弧氧化 陶瓷膜 工艺参数 

分 类 号：TG174.45[金属学及工艺—金属表面处理]