(1. 重慶理工大學 材料科學與工程學院，重慶 400054；
2. 重慶理工大學 重慶市模具技術重點實驗室，重慶 400054)
摘 要: 在酒石酸-硫酸溶液中陽極氧化AA2099-T8鋁鋰合金獲得陽極氧化膜，并采用新型綠色封閉工藝對陽極氧化膜進行封孔處理。采用場發(fā)射掃描電鏡觀察陽極氧化膜封孔前后的顯微形貌，通過開路電位、動電位極化、電化學阻抗譜及中性鹽霧實驗研究氧化膜封孔前后的耐腐蝕性能。結果表明：采用酒石酸-硫酸陽極氧化處理能在AA2099-T8鋁鋰合金表面生成一層均勻、致密的氧化膜，采用新型封閉工藝可在常溫下有效封閉氧化膜孔隙；陽極氧化和封孔處理均能提高合金的抗腐蝕能力，但單純的陽極氧化對合金耐腐蝕性能的提高有限，而陽極氧化+封孔處理能顯著提高合金的耐腐蝕性能。
關鍵字: 鋁鋰合金；陽極氧化；封孔；耐蝕性
（1. School of Materials Science and Engineering, Chongqing University of Technology, Chongqing 400054, China;
2. Chongqing Municipal Engineering Research Center of Institutions of Higher Education for Mould Technology,
Chongqing University of Technology, Chongqing 400054, China）
Abstract:AA2099-T8 aluminum-lithium alloy was anodized in tartaric-sulfuric acid solution to obtain the anodic films, and then the resultant anodic films were sealed by a novel, environmentally friendly sealing process. The morphology of the anodic films before and after sealing was examined using field emission gun scanning electron microscope (FEG-SEM). The corrosion resistance of the anodic films with and without sealing was investigated through open circuit potential measurement, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and neural salt spray test (NSST). The results show that, a uniform and compact anodic film forms on the alloy in tartaric-sulfuric acid solution and the film can be effectively sealed at room temperature by novel sealing process. The improvement of corrosion resistance by the anodic films alone is limited while anodizing and sealing can significantly improve the corrosion resistance of the alloy.
Key words: aluminum-lithium alloy; anodizing; sealing; corrosion resistance
