Deng Mingyang*,Li Ruijin,Zhang Nanrui,et al.Effect of graphene additive and current density on corrosion resistance of anodized coatings on aluminium-lithium alloys[J].Plating & Finishing,2024,(2):101-106.[doi:10.3969/j.issn.1001-3849.2024.02.015]
石墨烯添加剂与电流密度对铝锂合金阳极氧化膜层耐蚀性能的影响
- Title:
- Effect of graphene additive and current density on corrosion resistance of anodized coatings on aluminium-lithium alloys
- Keywords:
- aluminium-lithium alloys ; anodizing ; graphene ; corrosion resistance
- 分类号:
- TQ153.2
- 文献标志码:
- A
- 摘要:
- 本文以 Al-Li-Cu-Mg 合金为研究对象，在混酸电解液体系下进行阳极氧化处理，制备不同电流密度以及石墨烯掺入后的氧化膜。通过 SEM 、 XRD 、 EDS 等分析测试手段分析了各参数下膜层的表面与截面形貌、元素、物相组成等，并通过电化学工作站等仪器分别分析了膜层的耐蚀等性能。研究不同电流大小与石墨烯掺入后对膜层性能的影响机制。结果表明：电流密度的增加会使得材料膜层的厚度先增后减、缺陷增加，耐蚀性能先增后减，阳极氧化 膜耐蚀性能最佳电流密度为 15 A/dm 2 。同时石墨烯的掺入会降低膜层耐蚀性，阳极氧化膜腐蚀电流密度为 4.898×10 -7 A·cm -2 。
- Abstract:
- ： Al-Li-Cu-Mg alloy was anodized in mixed acid electrolyte system to prepare oxide films with different current densities and graphene infiltration. The surface and cross-sectional morphology ， elemental composition ， and phase composition of the film layer under various parameters were analyzed using SEM ， XRD ， EDS and other analysis and testing methods. The corrosion resistance and other properties of the film layer were also analyzed using electrochemical workstations and other instruments. The influence mechanism of different current and graphene penetration on the film properties was studied. The experimental results show that an increase in current density will first increase and then decrease the thickness of the material film layer ， increase defects ， and increase and then decrease the corrosion resistance. The optimal current density for corrosion resistance of anodic oxide film is 15 A/dm 2 . At the same time ， the inclusion of graphene will reduce the corrosion resistance of the film ， and the corrosion current density of the anodized film is 4.898×10 -7 A·cm -2 .
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备注/Memo
收稿日期： 2023-05-15 修回日期： 2023-07-05 * 通信作者： 邓名洋（ 2001 —），男，本科生， email ： 2696714349@qq.com?/html>