摘要
对镁合金表面沉积铝涂层这一镁合金表面处理的新技术进行了总结,分析了传统镁合金表面处理的优缺点以及在镁合金表面沉积铝涂层的优势。最新的在镁合金表面沉积铝涂层的工艺主要有铝粉埋覆扩散法、铝粉刷涂埋覆扩散法、火焰喷涂热扩散法、电弧喷涂热压法、动态金属喷镀法。在对以上沉积原理的分析和理解的基础上,详细阐述了镁合金表面铝涂层的耐蚀机理,并指出了该技术的应用前景和制约其发展的主要因素。
A new stream of surface treatment technologies for magnesium alloys, depositing aluminum on magnesium alloy, is summarized on the basis of recent laboratory experiments. The strong points and weak point of traditional magnesium alloy surface treatment technologies were analyzed and the advantages of aluminum coating on magnesium alloy were explained. The latest aluminum coating depositing technologies on magnesium alloy varies from diffusion between aluminum powder and magnesium alloy matrix at high temperature to thermal spraying aluminum powder or thread materials with both traditional and advanced spraying equipments. Based on the understanding to different technologies, the corrosion-resistant mechanism of aluminum coating on magnesium alloys was further discussed. Finally, the application foreground of the technology in question was predicted and the major problems limiting its development were put forward.
出处
《表面技术》
EI
CAS
CSCD
2007年第5期64-67,共4页
Surface Technology
基金
重庆市科技攻关重点项目(CSTC2004AA4003-6)
重庆市重点自然科学基金项目(CSTC200413A4002)
关键词
镁合金
铝涂层
扩散
热喷涂
耐蚀性
Magnesium alloy
Aluminum coating
Diffusion
Thermal spraying
Corrosion resistance
