铝合金表面蓝色微弧氧化陶瓷膜的制备及性能研究

发布时间：2018-05-11 01:07

本文选题：铝合金 + 微弧氧化　；参考：《材料导报》2017年10期

【摘要】：采用微弧氧化技术在5052铝合金表面制备蓝色陶瓷膜,研究Co(OH)_2着色剂浓度和微弧氧化电压对蓝色陶瓷膜组织结构和腐蚀性能的影响规律。采用光学显微镜、扫描电镜和X射线衍射研究蓝色陶瓷膜层的宏观形貌、微观组织和相结构,采用电化学工作站测试陶瓷层在3.5%(质量分数)NaCl溶液中的电化学腐蚀性能。研究结果表明,蓝色微弧氧化陶瓷层主要由γ-Al_2O_3组成,提高Co(OH)_2浓度或者氧化电压,膜层颜色由浅向深演变,当浓度增至3.0g/L后膜层蓝色不再加深,同时膜层表面逐渐封闭,致密性提高。在140V氧化电压下,添加1.0g/L Co(OH)_2所制备的蓝色膜层具有最好的耐腐蚀性能。蓝色膜具有颜色艳丽、装饰性好等优势,相信该蓝色微弧氧化膜技术在建筑材料和仪器仪表行业将会有广阔的应用前景。
[Abstract]:Blue ceramic films were prepared on the surface of 5052 aluminum alloy by micro-arc oxidation technique. The effects of Co(OH)_2 colorant concentration and micro-arc oxidation voltage on the microstructure and corrosion properties of blue ceramic films were studied. The macroscopic morphology, microstructure and phase structure of the blue ceramic film were studied by optical microscope, scanning electron microscope and X-ray diffraction. The electrochemical corrosion properties of the layer in 3.5% NaCl solution were measured by electrochemical workstation. The results show that the blue micro-arc oxidation ceramic layer is mainly composed of 纬 -Al _ 2O _ 3. When the concentration of Co(OH)_2 is increased or the oxidation voltage is increased, the color of the film changes from shallow to deep. When the concentration is increased to 3.0g/L, the blue of the film no longer deepens, and the film surface is gradually closed. The compactness is improved. The blue film prepared by adding 1.0g/L Co(OH)_2 has the best corrosion resistance at 140V oxidation voltage. Blue film has the advantages of bright color and good decoration. It is believed that the blue micro-arc oxide film technology will have a broad application prospect in the industry of building materials and instruments.
【作者单位】：北京理工大学材料学院;
【基金】：国家自然科学基金(51401024) 北京理工大学基础研究项目(20150942006)
【分类号】：TG174.453

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