超轻Mg-Li合金的腐蚀行为与表面处理

来源期刊:中国有色金属学报(英文版)2017年第7期

论文作者:孙月花 王日初 彭超群 冯艳 杨明

文章页码:1455 - 1475

关键词:Mg-Li合金;比强度;成形性;电磁屏蔽;腐蚀行为;表面处理;杂化涂层

Key words:Mg-Li alloy; specific strength; formability; electromagnetic shielding; corrosion behavior; surface treatment; hybrid coating

摘    要:Mg-Li合金作为超轻金属结构材料,由于其具有较高的比强度、较好的成形性和良好的电磁屏蔽性能,在航空航天以及军事领域具有良好的发展前景。综述Mg-Li合金的研究进展并指出其面临的三大问题。针对Mg-Li合金较差的耐蚀性,重点总结合金的腐蚀行为,并详细地介绍包括电镀、化学镀、等离子喷涂、熔盐置换、化学转化膜、阳极氧化、微弧氧化、有机涂层以及有机-无机杂化涂层等表面处理技术。最后,探讨Mg-Li合金腐蚀与防护的发展方向。

Abstract: Mg-Li alloy, as a superlight metallic engineering material, shows great potential in the fields of aerospace and military due to its high specific strength, better formability, and excellent electromagnetic shielding performance. The research process of Mg-Li alloys is reviewed and three main problems are pointed out. Aimed at the poor corrosion resistance of Mg-Li alloys, the corrosion behavior is mainly summarized. The surface treatment technologies, including electroplating, electroless plating, plasma spraying, molten salt replacement, conversion coating, anodizing, micro-arc oxidation, organic coating, and organic-inorganic hybrid coating, are introduced in detail. Finally, the future development of corrosion and protection of Mg-Li alloys is discussed.

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