金属热处理 ›› 2021, Vol. 46 ›› Issue (3): 28-32.DOI: 10.13251/j.issn.0254-6051.2021.03.006

• 工艺研究 • 上一篇    下一篇

瓷质氧化预处理对6061铝合金弱酸性介质中微弧氧化膜的影响

伍宇昊, 魏晓伟, 谢晓伟   

  1. 西华大学 材料科学与工程学院, 四川 成都 610039
  • 收稿日期:2020-11-20 出版日期:2021-03-25 发布日期:2021-05-08
  • 通讯作者: 魏晓伟,教授,博士,E-mail:weixiaowei90@yeah.net
  • 作者简介:伍宇昊(1990—),男,硕士研究生,主要研究方向为铝合金微弧氧化膜层,E-mail:wuyh002@163.com。
  • 基金资助:
    四川省重点学科材料加工工程项目(SZD0502-09);四川省重点学科平台项目(SZD1112-1)

Effect of ceramic anodizing pretreatment on micro-arc oxidation film of 6061 aluminum alloy in weak-acid electrolyte

Wu Yuhao, Wei Xiaowei, Xie Xiaowei   

  1. School of Materials Science and Engineering, Xihua University, Chengdu Sichuan 610039, China
  • Received:2020-11-20 Online:2021-03-25 Published:2021-05-08

摘要: 以6061铝合金为研究对象,对其在弱酸性介质中的微弧氧化膜的成分及性能进行了分析,探讨瓷质氧化预处理对微弧氧化膜的影响。结果表明:在弱酸性介质中,6061铝合金瓷质氧化预处理+微弧氧化膜的主要成分是γ-Al2O3和α-Al2O3,同时由于残留的瓷质氧化膜,无定型的Al2O3也存在于氧化膜中;其厚度和硬度分别为25.3 μm、1690 HV0.1,对比未预处理的微弧氧化膜,瓷质氧化预处理可显著提高氧化膜的厚度、硬度及耐腐蚀性。

关键词: 微弧氧化, 6061铝合金, 瓷质氧化预处理

Abstract: Taking 6061 aluminum alloy as the research object, the composition and performance of its micro-arc oxidation (MAO) film in weak-acid electrolyte were analyzed, and the influence of ceramic anodizing pretreatment on the MAO film was discussed. The results show that in weak-acid electrolyte, the 6061 aluminum alloy MAO film with ceramic anodizing pretreatment is mainly composed of γ-Al2O3 and α-Al2O3, while amorphous Al2O3 also exists due to the residual ceramic anodizing film. Compared with the non-pretreated MAO film, the ceramic anodizing pretreatment can significantly increase the thickness, hardness and corrosion resistance of the oxidation film, of which the thickness and hardness after the pretreatment are 25.3 μm and 1690 HV0.1, respectively.

Key words: micro-arc oxidation, 6061 aluminum alloy, ceramic anodizing pretreatment

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