首页|6061铝合金黄色微弧氧化膜层制备工艺优化及性能表征

6061铝合金黄色微弧氧化膜层制备工艺优化及性能表征

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[目的]铝合金本色单一且在使用中易发生腐蚀,导致美观度下降.[方法]通过优化电参数与着色剂高锰酸钾的添加量,在 6061 铝合金表面制备了色泽均匀的黄色微弧氧化陶瓷膜.采用Lab色差评价体系对膜层的颜色进行定量分析.[结果]确定了最优的工艺参数为:频率500 Hz,占空比20%,脉冲比5∶1,正向电流密度8 A/dm2,负向电流密度2 A/dm2,高锰酸钾质量浓度0.8 g/L.由此获得的黄色膜层的b值为19.2,色差为0.09,与基体结合紧密且表面有典型的"火山口"形貌.该黄色膜层主要由γ-Al2O3 和少量非晶相组成,表面均匀分布着大量锰氧化物是其显示黄色的主要原因.[结论]控制锰氧化物的生成可调节黄色微弧氧化膜的颜色.
Optimization of the process for preparing yellow micro-arc oxidation film on 6061 aluminum alloy and its characterization
[Introduction]Aluminum alloys have a single natural color and are easy to corrosion in use,resulting in a decline in beauty.[Method]A uniform yellow ceramic film was prepared by micro-arc oxidation(MAO)on the surface of 6061 aluminum alloy after optimizing the electrolysis parameters and the dosage of potassium permanganate as a colorant.The color of the MAO film was quantitatively analyzed by Lab chromatic aberration evaluation system.[Result]The optimal process conditions were determined as follows:frequency 500 Hz,duty cycle 20%,positive/negative pulse number ratio 5:1,positive current density 8 A/dm2,negative current density 2 A/dm2,and potassium permanganate dosage 0.8 g/L.A yellow MAO film with a b value of 19.2 and a color difference of 0.09 was formed firmly on 6061 aluminum alloy under the said conditions,which owned a typical"crater"surface morphology and was composed of γ-Al2O3 and some amorphous phases.The uniform distribution of a large amount of manganese oxides on the MAO film surface is the main reason for its yellow color.[Conclusion]The color of yellow MAO film can be adjusted by controlling the formation of manganese oxides.

aluminum alloymicro-arc oxidationpotassium permanganateyellowmicrostructure

朱枝胜、李康、祝闻、易爱华、廖忠淼、田君、李志恒、陈胤、蔡雨菲、刘玉婷

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东莞理工学院分析测试中心,广东 东莞 523808

东莞理工学院材料科学与工程学院,广东 东莞 523808

铝合金 微弧氧化 高锰酸钾 黄色 微观结构

广东省基础与应用基础研究基金-粤莞联合基金广东省教育厅科技创新项目广东省教育厅科技创新项目东莞理工学院科研启动专项东莞市科技特派员项目东莞市科技特派员项目广东省高等学校创新团队项目广东省高性能轻合金及其成型工程技术研究中心项目东莞市新型轻合金及其加工技术重点实验室项目

2019A15151104662023KTSCX1472023KTSCX14821113505920201800500482202218005001222021KCXTD022

2024

电镀与涂饰
广州市二轻工业科学技术研究所

电镀与涂饰

CSTPCD北大核心
影响因子:0.47
ISSN:1004-227X
年,卷(期):2024.43(6)
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