Cheng Zhangjianing ? Huang Kunkun.Influence of nano-La 2 O 3 particles on performance of anodic oxide films on aluminum alloy for construction[J].Plating & Finishing,2023,(2):20-26.[doi:10.3969/j.issn.1001-3849.2023.02.004]
纳米La2O3颗粒对建筑铝合金表面阳极氧化膜性能的影响
- Title:
- Influence of nano-La 2 O 3 particles on performance of anodic oxide films on aluminum alloy for construction
- 关键词:
- 阳极氧化膜; 纳米 La 2 O 3 颗粒; 掺杂; 表面润湿性; 耐蚀性
- Keywords:
- anodic oxide film ; nano-La 2 O 3 particles ; doping ; surface wettability ; corrosion resistance
- 分类号:
- TQ153.6
- 文献标志码:
- A
- 摘要:
- 以建筑行业常用的 6463 铝合金作为基材进行阳极氧化，通过共沉积技术使纳米 La 2 O 3 颗粒掺杂在阳极氧化膜中，进一步提高其耐蚀性。研究了纳米 La 2 O 3 颗粒添加浓度对阳极氧化膜的形貌、孔隙率、成分、表面润湿性和耐蚀性的影响。结果表明：不加纳米 La 2 O 3 颗粒时，阳极氧化膜不致密且孔隙率较高，表面呈亲水性，耐蚀性相对较差。适量的纳米 La 2 O 3 颗粒参与成膜过程，使阳极氧化膜的致密性逐步提高，孔隙率降低且成分发生变化，表面由亲水性转变为疏水性，耐蚀性明显提高。当纳米 La 2 O 3 颗粒浓度为 2.2 g/L 时，阳极氧化膜的孔隙率仅为 14.2 % ， La 2 O 3 颗粒含量接近 2.60 % ，表面致密且呈良好的疏水性，其腐蚀电流密度较 6463 铝合金降低了接近两个数量级，腐蚀失重仅为 1.39 g/m 2 ，可以为 6463 铝合金提供更好的防护作用。
- Abstract:
- ： The 6463 aluminum alloy commonly used in the construction industry was anodized as substrate ， and nano-La 2 O 3 particles were doped in the anodic oxide films by co-deposition technology to further improve its corrosion resistance. The influence of the concentration of nano-La 2 O 3 particles on the morphology ， porosity ， components ， surface wettability and corrosion resistance of the anodic o xide films was studied. The results show that the anodic oxide film is loosen with a relatively high porosity ， the surface is hydrophilic and the corrosion resistance is relatively poor when the nano-La 2 O 3 particles are not added. Appropriate amount of nano-La 2 O 3 particles participate in the film formation process to gradually increase the compactness of the anodic oxide film ， reduce the porosity and change the components. Moreover ， the surface wettability changes from hydrophilic to hydrophobic ， and the corrosion resistance is significantly improved. When the concentration of nano-La 2 O 3 particles is 2 .2 g/L ， the porosity of anodized film is only 14.2 % ， the content of La 2 O 3 particles is close to 2.60 % ， and the surface is compact and has good hydrophobicity. The corrosion current density decreases by nearly two orders of magnitude compared with 6463 aluminum alloy ， and the corrosion weight loss is only 1.39 g/m 2 ， indicating that the anodic oxide film can provide better protection for 6463 aluminum alloy.
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备注/Memo
收稿日期： 2021-12-18 修回日期： 2022-02-14 作者简介： 成张佳宁（ 1993 —），女，博士，高级工程师，主要研究方向：建筑结构材料、腐蚀防护。 email ： 776746576@qq.com 基金项目： 住房和城乡建设部科技计划项目（ K42014159 ）?/html>