Lanthanum-organic acid composite sealing technique of aluminum alloy anodized film at room temperature?/html>[J].Plating & Finishing,2024,(8):91-97.[doi:10.3969/j.issn.1001-3849.2024.08.014]
常温下铝合金阳极氧化膜的镧-有机酸复合封闭技术
- Title:
- Lanthanum-organic acid composite sealing technique of aluminum alloy anodized film at room temperature?/html>
- Keywords:
- aluminium alloy ; anodic oxidation ; seal at normal temperature ; nickel free sealing
- 分类号:
- TG174.4
- 文献标志码:
- A
- 摘要:
- 为实现铝合金阳极氧化膜的常温快速封闭，将硫酸镧与单宁酸、酒石酸、硼酸和柠檬酸分别复配，对阳极氧化膜进行封闭。利用 X 射线光电子能谱（ XPS ）和能量色散 X 射线谱仪（ EDS ）谱图对表面及断面进行元素分析，电化学阻抗谱、 Tafel 试验进行耐蚀性能分析。结果表明，采用硫酸镧 1 g/L 、单宁酸 5 g/L ，在 25 ℃ 、 25 min 条件下能够得到平整、致密的封闭效果，其耐蚀性能显著提升；并根据以上结果分析了镧 - 有机酸复合封闭的机理。
- Abstract:
- ： Studied the rapid sealing technology of aluminum alloy anodizing film at room temperature. Lanthanum sulfate was mixed with tannic acid ， tartaric acid ， boric acid and citric acid respectively ， and the anodic oxide film was sealed by these four sealing methods. The element composition of surface and cross section was analyzed by X-ray photoelectron spectroscopy （ XPS ） and energy dispersive X-ray spectrometer （ EDS ） spectrum. Electrochemical impedance spectroscopy and Tafel test were used to analyze the corrosion resistance performance. The results showed that using 1 g/L lanthanum sulfate and 5 g/L tannic acid ， a flat and dense sealing effect can be achieved under 25 ℃ and 25 min. The corrosion resistance of the sample has significantly improved. Based on the above results ， the mechanism of lanthanum organic acid composite sealing was analyzed.
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备注/Memo
收稿日期： 2024-02-22 修回日期： 2024-03-30 作者简介： 李贝贝（ 1997 —），女，硕士研究生，研究方向为阳极氧化膜制备， email ： lbb19980626@163.com * 通信作者： 李冰， email ： lbing@hfut.edu.cn?/html>