【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-Al₂O₃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。更多还原

【Abstract】 A blue ceramic coating was prepared on 5052 aluminum alloy by micro-arc oxidation in the manuscript.We systematically investigated the effects of the Co（OH）₂concentration and the applied voltage on the microstructure and the corrosion resistance.The OM,SEM and XRD were employed to characterize the macrostructure,microstructure and phase structure,respectively.The electrochemical corrosion resistance of coatings was measured by an electrochemical workstation in 3.5wt% NaCl solution.The results show that the phase structure is mainly compose ofγ-Al₂O₃.As the Co（OH）₂concentration and voltage increased,the blueness degree of coatings gradually deepen,and the color is the darkest when added 3.0g/L Co（OH）₂.Meanwhile,the surface tended to close and became denser.The results show that the corrosion resistance of ceramic coating is best with 1.0g/L Co（OH）₂ when the voltage was 140 V.We believe that the micro-arc oxidation technology of blue ceramic coating will have a wide range of applications in building materials and instrumentation industries as its gorgeous color and decorative function.更多还原