Fu Guangyan,Zhai Zhaoxin*,Ren Lei,et al.Effect of polyaspartic acid on properties of anodic oxide film of AZ91D magnesium alloy[J].Plating & Finishing,2023,(4):26-30.[doi:10.3969/j.issn.1001-3849.2023.04.005]
聚天冬氨酸对AZ91D镁合金阳极氧化膜性能的影响
- Title:
- Effect of polyaspartic acid on properties of anodic oxide film of AZ91D magnesium alloy
- Keywords:
- AZ91D magnesium alloy ; anodic oxidation ; polyaspartic acid ; corrosion resistance
- 分类号:
- TG174.4
- 文献标志码:
- A
- 摘要:
- 为提高 AZ91D 镁合金耐蚀性且满足绿色环保要求，在阳极氧化电解液中添加环保型添加剂聚天冬氨酸（ PASP ）制备阳极氧化膜，研究添加剂聚天冬氨酸对阳极氧化过程、氧化膜的形貌及组成和耐腐蚀性能的影响。采用光学显微镜、带能谱的扫描电镜及 X 射线衍射仪，观察分析添加聚天冬氨酸前后阳极氧化膜的形貌及组成，利用动电位极化及浸泡腐蚀等方法，研究分析阳极氧化后 AZ91D 镁合金的耐腐蚀性能。结果表明：聚天冬氨酸通过与镁合金表面的吸附作用，使膜层阻抗增大，阳极氧化成膜电压升高，膜厚增大，膜层致密、均匀、平整，微孔和裂纹减少，提高了氧化膜的耐腐蚀性能。
- Abstract:
- ： In order to improve the corrosion resistance of AZ91D magnesium alloy and meet the requirements of environmental protection ， an environmentally friendly additive ， polyaspartic acid （ PASP ） was added to the anodizing electrolyte to prepare an anodic oxide film. The effects of PASP on the anodizing process ， the morphology and composition of the oxide film and the corrosion resistance were studied. The morphology and composition of anodic oxide film before and after adding polyaspartic acid were observed and analyzed by optical microscope ， scanning electron microscope with energy spectrum and X-ray diffractometer. The corrosion resistance of AZ91D magnesium alloy after anodic oxidation was studied and analyzed by potentiodynamic polarization and immersion corrosion. The results show that polyaspartic acid can increase the impedance of the film ， increase the anodic oxidation voltage ， increase the film thickness ， make the film compact ， uniform and smooth ， reduce micropores and cracks ， and improve the corrosion resistance of the oxide film.
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备注/Memo
收稿日期： 2023-02-13 修回日期： 2023-02-27 作者简介： 付广艳（ 1965 —），女，博士，教授， email ： fu_guangyan@126.com * 通信作者： 翟召鑫， email ： 1546726609@qq.com 基金项目： 辽宁省教育厅科学研究项目（ LJ2020015 ）?/html>