A kind of environment-friendly anodic oxidation technology was used to oxidize 2024 aluminum alloys from mixed acid solutions to effectively improve the anticorrosion and mechanical performances. The influences of anode oxidation method on surface morphology, microstructure, composition, electrochemistry parameter, anticorrosion property were studied. Aluminum alloy oxidation is actually a dynamic equilibrium process of the formation and dissolution of oxide film which is composed of porous and non-porous layer. With the treatment of anodic oxidation, [Formula: see text]-Al2O3 and [Formula: see text]-Al2O3 structures were obtained on the surface of aluminum alloys, which contributed directly to the increase of anticorrosion performance. The potassium dichromate solution was used to seal the surface of oxide films to further improve the anticorrosion property. The oxide films sealed with potassium dichromate were covered with leaf-like structures resulting in larger corrosion resistance that attributed directly to the decrease of corrosion current.

中文翻译：

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2024年创新环保氧化技术制备的氧化铝薄膜

采用一种环保型阳极氧化技术，对混合酸溶液中的2024铝合金进行氧化，有效提高了其​​防腐性能和力学性能。研究了阳极氧化方法对表面形貌、微观结构、成分、电化学参数、防腐性能的影响。铝合金氧化实际上是由多孔层和无孔层组成的氧化膜形成和溶解的动态平衡过程。经阳极氧化处理，[式：见正文]-Al2○3和[公式：见正文]-Al2○3在铝合金表面获得结构，直接有助于提高防腐性能。重铬酸钾溶液用于密封氧化膜表面，进一步提高防腐性能。用重铬酸钾密封的氧化膜覆盖有叶状结构，导致更大的耐腐蚀性，这直接归因于腐蚀电流的降低。