Wu Yinghao, Zhao Wenjie, Wang Wurong, Wang Liping, Xue Qunji
Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China.
School of Materials and Engineering, Shanghai University, Shanghai, 200000, China.
Sci Rep. 2017 May 2;7(1):1344. doi: 10.1038/s41598-017-01549-y.
In the present work, the novel anodic oxide film (AOF) with self-sealing layer was successfully fabricated on 2024Al alloys by using an improved anodic oxidation method. The presence of the self-sealing layer on the porous layer of AOF was verified by Field emission scanning electron micro scope. Confocal laser scanning microscope (CLSM) and X-ray photoelectron spectroscopy (XPS) were used to evaluate the morphology and the corrosion products of the AOF after salt spray test. The microhardness test showed that the self-sealing AOFs still displayed high hardness even after salt spray test. Electrochemical test and salt spray test results illustrated the excellent corrosion performance of the novel structured self-sealing anodic oxide film (SAOF) compared with common porous AOFs. The narrow diameter makes it difficult for chlorine ions ingress into the pores of SAOFs. The self-sealing layer played an important role in protecting the SAOF from corrosion.
在本工作中，采用改进的阳极氧化方法在2024铝合金上成功制备了具有自封层的新型阳极氧化膜（AOF）。通过场发射扫描电子显微镜验证了AOF多孔层上自封层的存在。利用共聚焦激光扫描显微镜（CLSM）和X射线光电子能谱（XPS）对盐雾试验后的AOF的形貌和腐蚀产物进行了评估。显微硬度测试表明，即使经过盐雾试验，自封AOF仍具有较高的硬度。电化学测试和盐雾试验结果表明，与普通多孔AOF相比，新型结构的自封阳极氧化膜（SAOF）具有优异的耐腐蚀性能。窄孔径使得氯离子难以进入SAOF的孔隙。自封层在保护SAOF免受腐蚀方面发挥了重要作用。
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