镁锂合金的腐蚀机理及表面防护方法研究进展
发布时间：2018-12-17 17:59
【摘要】：镁锂(Mg-Li)合金具有质量超轻、强度高、延展性好和成形性好等优点,在汽车、航空航天、军事及核工业等领域具有广阔的应用前景。但是高化学活性的锂使该合金易在使用环境中发生腐蚀且难以防护,限制了其广泛应用。因此,研究Mg-Li合金的腐蚀机理并发展有效的防腐蚀技术极为重要。基于近年来国内外的研究进展,本文综述了Mg-Li合金在大气、中性及碱性NaCl溶液和模拟人体体液中的腐蚀机理,介绍了Mg-Li合金在不同环境中的腐蚀过程。同时对Mg-Li合金的表面防护方法作了系统总结,包括阳极氧化、电镀与化学镀、化学转化、涂层及其他表面防腐蚀方法,分析了各种表面防护方法的特点、优势与不足。并对Mg-Li合金表面防护的未来发展进行了展望,提出通过涂层的复合化、功能化及自修复化可以提高涂层对Mg-Li合金的防腐蚀性能和实用性。
[Abstract]:Magnesium-lithium (Mg-Li) alloys have the advantages of super light weight, high strength, good ductility and good formability, etc., and have broad application prospects in automotive, aerospace, military and nuclear industries. However, the high chemical activity of lithium makes the alloy easy to corrode in the use environment and difficult to protect, which limits its wide application. Therefore, it is very important to study the corrosion mechanism of Mg-Li alloy and develop effective anticorrosion technology. Based on the recent research progress at home and abroad, the corrosion mechanism of Mg-Li alloys in atmospheric, neutral and alkaline NaCl solutions and simulated body fluids is reviewed, and the corrosion process of Mg-Li alloys in different environments is introduced. At the same time, the surface protection methods of Mg-Li alloy are summarized systematically, including anodic oxidation, electroplating and electroless plating, chemical conversion, coating and other surface corrosion protection methods. The characteristics, advantages and disadvantages of various surface protection methods are analyzed. The future development of surface protection of Mg-Li alloy is prospected. It is suggested that the corrosion resistance and practicability of the coating to Mg-Li alloy can be improved by the composite, functionalization and self-repair of the coating.
【作者单位】： 哈尔滨工程大学材料科学与化学工程学院;齐齐哈尔大学化学与化学工程学院;齐齐哈尔大学材料科学与工程学院;
【基金】：国家自然科学基金项目(51574097)
【分类号】：TG174.4
[Abstract]:Magnesium-lithium (Mg-Li) alloys have the advantages of super light weight, high strength, good ductility and good formability, etc., and have broad application prospects in automotive, aerospace, military and nuclear industries. However, the high chemical activity of lithium makes the alloy easy to corrode in the use environment and difficult to protect, which limits its wide application. Therefore, it is very important to study the corrosion mechanism of Mg-Li alloy and develop effective anticorrosion technology. Based on the recent research progress at home and abroad, the corrosion mechanism of Mg-Li alloys in atmospheric, neutral and alkaline NaCl solutions and simulated body fluids is reviewed, and the corrosion process of Mg-Li alloys in different environments is introduced. At the same time, the surface protection methods of Mg-Li alloy are summarized systematically, including anodic oxidation, electroplating and electroless plating, chemical conversion, coating and other surface corrosion protection methods. The characteristics, advantages and disadvantages of various surface protection methods are analyzed. The future development of surface protection of Mg-Li alloy is prospected. It is suggested that the corrosion resistance and practicability of the coating to Mg-Li alloy can be improved by the composite, functionalization and self-repair of the coating.
【作者单位】： 哈尔滨工程大学材料科学与化学工程学院;齐齐哈尔大学化学与化学工程学院;齐齐哈尔大学材料科学与工程学院;
【基金】：国家自然科学基金项目(51574097)
【分类号】：TG174.4
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