Liu Yanfen,Chen Zhaoyi *.Study on preparation and properties of composite anodized film on surface of construction aluminum[J].Plating & Finishing,2024,(8):83-90.[doi:10.3969/j.issn.1001-3849.2024.08.013]
建筑铝材表面复合阳极氧化膜的制备及其性能研究
- Title:
- Study on preparation and properties of composite anodized film on surface of construction aluminum
- 关键词:
- 复合阳极氧化膜; 建筑铝材; PTFE 乳液体积分数; 耐腐蚀性能; 抗磨损性能
- Keywords:
- composite anodized film ; construction aluminum ; volume fraction of PTFE emulsion ; corrosion resistance ; wear resistance
- 分类号:
- TQ153.6
- 文献标志码:
- A
- 摘要:
- 为进一步提高建筑铝材表面性能，以满足苛刻的应用要求，采用添加 PTFE （ Polytetrafluoroethylene ，简写为 PTFE ）乳液的电解液在铝材表面制备复合阳极氧化膜，研究了 PTFE 乳液体积分数对复合阳极氧化膜的微观形貌、成分、厚度、耐腐蚀与抗磨损性能的影响。结果表明，复合阳极氧化膜表面吸附一些白色 PTFE 颗粒，孔洞和凹坑的数量与常规阳极氧化膜相比有所减少，但 PTFE 乳液体积分数变化会对复合阳极氧化膜的形貌特征、吸附的 PTFE 颗粒的分布状况、成分、厚度、耐腐蚀与抗磨损性能造成一定影响。添加 12 mL/L PTFE 乳液制备的复合阳极氧化膜致密性较好，并且表面吸附较多 PTFE 颗粒（含量接近 3% ），其厚度约为 20 μ m ，腐蚀电流密度仅为 9.07×10 - 7 A/cm 2 ，并且在相同腐蚀介质中浸泡 14 d 后整体腐蚀程度最轻，耐腐蚀性能明显好于常规阳极氧化膜和其它复合阳极氧化膜。该复合阳极氧化膜还具有良好的抗磨损性能，磨损量和摩擦系数仅为 8.4 mg 和 0.52 ，与常规阳极氧化膜相比分别降低 45% 和 29% 。
- Abstract:
- ： In order to further improve the surface properties of construction aluminum to meet the demanding application requirements ， a composite anodized film was prepared on the surface of aluminum from the electrolyte containing PTFE （ Polytetrafluoroethylene ， abbreviated as PTFE ） emulsion ， and the effect of volume fraction of PTFE emulsion on the microstructure ， composition ， thickness ， corrosion resistance and wear resistance of the composite anodized film was studied. The results show that some white PTFE particle is adsorbed on the surface of composite anodized film ， and the number of holes and pits is decreased compared with that of conventional anodized film. However ， the variation of volume fraction of PTFE emulsion has certain effect on the morphology characteristics ， distribution of adsorbed PTFE particle ， composition ， thickness ， corrosion resistance and wear resistance of composite anodized film. The composite anodized film prepared from the electrolyte containing 12 mL/L PTFE emulsion has good compactness and more PTFE particle adsorbed on the surface （ the content of particle is close to 3% ）， its thickness is about 20 μ m ， the corrosion current density is only 9.07×10 - 7 A/cm 2 ， and the overall corrosion degree is the lowest after soaking in the same corrosive medium for 14 days ， indicating that the corrosion resistance of the composite anodized film is obviously better than that of conventional anodized film and other composite anodized films. Moreover ， the composite anodized film also has good wear resistance ， and the abrasion loss and friction coefficient are only 8.4 mg and 0.52 ， which are 45% and 29% lower than that of conventional anodized film ， respectively.
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备注/Memo
收稿日期： 2023-12-06 修回日期： 2024-01-13 作者简介： 刘艳芬（ 1984 ―），讲师，研究方向为建筑结构材料， email ： Liuyfen123@163.com * 通信作者： 陈昭怡（ 1956 ―），教授，研究方向机械材料、特种加工技术等， email ： Edu_030619@163.com 基金项目： 山西省自然科学基金项目（ 2019011007 ）