镁合金低能耗微弧氧化膜层组织结构及耐蚀性的试验研究  

Microstructure and corrosion resistance of MAO coatings fabricated with low energy consumption on magnesium alloy

作　　者：王晓波[1] 全风美[1] 李盛和[1] 姜云波[1] 谢志强[1] 

机构地区：[1]中国工程物理研究院,四川绵阳621900

出　　处：《轻合金加工技术》2015年第11期50-55,共6页Light Alloy Fabrication Technology

摘　　要：在镁合金表面试制了低能耗微弧氧化膜层,通过SEM、TEM及电化学腐蚀、盐水浸泡失重测试,对低能耗微弧氧化膜层的组织结构及耐蚀性能进行了研究。结果显示,低能耗电解液中制备的微弧氧化膜层与普通微弧氧化膜层表面形貌存在明显差异;前者的主要成分是非晶相而不是Mg O晶体相;电化学腐蚀及盐水浸泡失重试验结果同时显示,低能耗微弧氧化膜层的电化学腐蚀性能与常规微弧氧化膜层的差别不大,两种膜层都可以对镁合金基体起到良好的保护作用。MAO coatings were fabricated on the magnesium alloy surface in the low energy consumption electrolyte. The microstructure and corrosion resistance of the coatings were tested by SEM, TEM, electrochemical corrosion and weight loss in saline soak. The results show that the surface microstructure of the coatings fabricated with low energy consumption, mainly composed of MgO amorphous phases instead of crystal phases, is different from that of normal MAO coatings. Experimental results also demonstrate that both coatings have similar electrochemical corrosion properties and can prevent magnesium alloys from corrosion.

关 键 词：微弧氧化 低能耗 组织结构 耐蚀性 

分 类 号：TG174.4[金属学及工艺—金属表面处理]