Ti纳米颗粒浓度对AZ91D镁合金表面微弧氧化膜层耐蚀性的影响

doi:10.13251/j.issn.0254-6051.2025.03.042

金属热处理 ›› 2025, Vol. 50 ›› Issue (3): 263-269.DOI: 10.13251/j.issn.0254-6051.2025.03.042

Ti纳米颗粒浓度对AZ91D镁合金表面微弧氧化膜层耐蚀性的影响

邹琛, 周凡, 周根树

西安交通大学金属材料强度国家重点实验室, 陕西西安 710049

收稿日期:2024-10-22 修回日期:2025-01-09 出版日期:2025-03-25 发布日期:2025-05-14
通讯作者: 周根树,教授,博士,E-mail:zhougs@mail.xjtu.edu.cn
作者简介:邹琛(1998—),男,硕士,主要研究方向为镁合金的腐蚀与防护,E-mail:zou18437903120@163.com。
基金资助:
西安市科技创新计划(201805064ZD15CG48);陕西省重点研发计划(2021GY-253)

Effect of Ti nanoparticle concentration on corrosion resistance of micro-arc oxidation film on AZ91D magnesium alloy

Zou Chen, Zhou Fan, Zhou Genshu

State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an Shaanxi 710049, China

Received:2024-10-22 Revised:2025-01-09 Online:2025-03-25 Published:2025-05-14

摘要/Abstract

摘要： 采用SEM、EDS、电化学测试和析氢测试等方法,研究硅酸盐电解液中添加不同浓度Ti纳米颗粒对AZ91D镁合金微弧氧化膜层的形貌结构和耐蚀性的影响。研究结果表明,添加0.25~1.00 g/L Ti纳米颗粒时,随着Ti纳米颗粒浓度增加,微孔数量减少,膜层厚度增加、致密性提高,耐蚀性先升高后降低。微弧氧化过程中生成TiO₂填充了微弧氧化膜层的部分孔洞,改善膜层质量。当Ti纳米颗粒浓度为0.50 g/L时耐蚀性最好,该含Ti微弧氧化膜层能够在0.6 mol/L氯化钠溶液中将膜层阻值提高3个数量级以上,并使析氢速率大大降低。

关键词: AZ91D镁合金, 微弧氧化, 耐蚀性, 钛纳米颗粒

Abstract: Effect of adding different concentration of Ti nanoparticles in silicate electrolyte on the morphology, structure and corrosion resistance of AZ91D magnesium alloy micro-arc oxidation film were studied by SEM, EDS, electrochemical workstation and hydrogen evolution test. The results show that with the addition of 0.25-1.00 g/L Ti nanoparticles, the number of micropores decreases, the film thickness increases, the compactness increases, and the corrosion resistance firstly increases and then decreases with the increase of concentration of Ti nanoparticles. In the process of micro-arc oxidation, TiO₂ is generated to fill some holes in the micro-arc oxidation film and improve the quality of the film. When the concentration of Ti nanoparticles is 0.50 g/L, the corrosion resistance of the Ti micro-arc oxide film can be increased by more than 3 orders of magnitude in 0.6 mol/L sodium chloride solution, and the hydrogen evolution rate can be reduced greatly.

Key words: AZ91D Mg alloy, micro-arc oxidation, corrosion resistance, titanium nanoparticles

中图分类号:

TG178

邹琛, 周凡, 周根树. Ti纳米颗粒浓度对AZ91D镁合金表面微弧氧化膜层耐蚀性的影响[J]. 金属热处理, 2025, 50(3): 263-269.

Zou Chen, Zhou Fan, Zhou Genshu. Effect of Ti nanoparticle concentration on corrosion resistance of micro-arc oxidation film on AZ91D magnesium alloy[J]. Heat Treatment of Metals, 2025, 50(3): 263-269.

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Ti纳米颗粒浓度对AZ91D镁合金表面微弧氧化膜层耐蚀性的影响

Effect of Ti nanoparticle concentration on corrosion resistance of micro-arc oxidation film on AZ91D magnesium alloy

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