Zhang Ce,Zhang Dezhong*,Guo Junhao,et al.A low-temperature nickel-free sealing process for anodic oxide film on aluminum alloys and its sealing performance?/html>[J].Plating & Finishing,2024,(1):20-27.[doi:10.3969/j.issn.1001-3849.2024.01.004]
铝合金阳极氧化膜低温无镍封孔工艺及其封孔性能
- Title:
- A low-temperature nickel-free sealing process for anodic oxide film on aluminum alloys and its sealing performance?/html>
- Keywords:
- aluminum alloy ; anodizing ; nickel free sealing ; low-temperature
- 分类号:
- TQ153.6
- 文献标志码:
- A
- 摘要:
- 为克服传统沸水封孔高能耗和镍盐封孔污染环境的不足，研制了一种无镍低温封孔工艺，其工艺为：锂盐 20~30 g/L ，氟锆酸盐 3.0~5.0 g/L ，表面活性剂 1.0~2.0 g/L ，有机添加剂 N 2.0~4.0 mL/L ，温度 35~55 ℃ ， pH 5.0~5.4 ，封闭时间宜控制在 2~3 min/ μ m 。通过酸浸蚀失重试验和电化学试验法对封孔质量和封孔膜的耐蚀性进行评价。结果表明：采用配制的低温无镍封孔剂进行封闭，膜层酸浸蚀失重＜ 30 mg·dm -2 ，电化学性能明显改善，其封孔效果优于沸水封孔，略差于常温镍盐封孔。
- Abstract:
- ： In order to overcome the shortcomings of traditional boiling water sealing with high energy consumption and nickel salt sealing environment pollution ， a nickel-free low-temperature sealing process was developed ， which includes lithium salt 20 - 30 g/L ， fluorozirconate 3.0 - 5.0 g/L ， surfactant 1.0 - 2.0 g/L and organic additive N 2.0 - 4.0 mL/L. The temperature is 35 - 55 ℃ ， pH value is 5.0 - 5.4 ， and the sealing time should be controlled at 2 - 3 min/ μ m. The sealing quality was evaluated by acid etching test ， and the corrosion resistance of the sealing film was evaluated by electrochemical test. The results show that when the low-temperature nickel-free sealing process is used for sealing ， the weight loss of the anodic oxide film is less than 30 mg·dm -2 after acid etching ， and the electrochemical performance is obviously improved. The sealing quality is better than that of boiling water sealing process and slightly worse than that of normal temperature nickel salt sealing process.
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备注/Memo
收稿日期： 2023-05-10 修回日期： 2023-05-31 作者简介： 张策（ 1996 ―），男，硕士研究生， email ： 1505713001@qq.com * 通信作者： 张德忠（ 1974 ―），男，研究员，硕士生导师，主要从事轻金属表面处理技术研发及其标准化， email ： dezhong@foxmail.com?/html>