LUO Cong,MA Shuo *.Effect of Chromium-Free Sealing Treatment on Corrosion Resistance of Anodic Oxide Films on ZL101A Aluminum Alloy[J].Plating & Finishing,2022,(2):46-50.[doi:10.3969/j.issn.1001-3849.2022.02.010]
无铬封闭处理对ZL101A铝合金阳极氧化膜耐蚀性能的影响
- Title:
- Effect of Chromium-Free Sealing Treatment on Corrosion Resistance of Anodic Oxide Films on ZL101A Aluminum Alloy
- 分类号:
- TQ153.6
- 文献标志码:
- A
- 摘要:
- 对汽车用 ZL101A 铝合金进行阳极氧化，并分别采用热水封闭、钴盐封闭、锆盐封闭和铈盐封闭等无铬封闭工艺对阳极氧化膜进行封闭处理。表征了封闭前后阳极氧化膜的形貌，并测试分析了封闭前后阳极氧化膜的厚度和耐蚀性能。结果表明：与未封闭阳极氧化膜相比，封闭处理后阳极氧化膜的孔隙率降低，表面平整度和致密性改善，耐蚀性能有不同程度提高，但厚度变化不大。铈盐封闭阳极氧化膜表面平整度和致密性最好，粗糙度为 0.216 μ m ，电荷转移电阻达到 1.93×105 Ω ·cm 2 ，腐蚀质量损失为 1.79 g/m 2 ，其耐蚀性能优于热水封闭、钴盐封闭和锆盐封闭阳极氧化膜。铈盐封闭是效果最好的无铬封闭工艺。
- Abstract:
- Anodic oxidation of ZL101A aluminum alloy for automobile was carried out ， and the anodic oxidation film was sealed by chrome-free sealing process of hot water sealing ， cobalt sealing ， zirconium sealing and cerium salt sealing ， respectively. The morphology of the anodic oxide films before and after sealing was characterized ， and the thickness and corrosion resistance of the anodic oxide films before and after sealing were tested and analyzed. The results showed that compared with the unsealed anodic oxide film ， the porosity of the anodic oxide film after sealing treatment was decreased ， the surface roughness and compactness were improved ， and the corrosion resistance was improved to different degrees ， but the thickness was almost unchanged. The surface roughness and densification of the anodic oxide film sealed with cerium salt was 0.216 μ m ， the charge transfer resistance reached 1.93×10 5 Ω ·cm 2 and the corrosion loss was 1.79 g/m 2 . The corrosion resistance of the anodic oxide film sealed with cerium salt was better than that of the anodic oxide films sealed with hot water ， cobalt salt and zirconium salt. Cerium salt sealing was the best chrome-free sealing process.
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备注/Memo
收稿日期： 2021-06-17 修回日期： 2021-07-27 作者简介： 骆骢（ 1976 —），男，本科，教授， email ： Luo_7878@126.com 通信作者： 马硕（ 1981 —），男，博士，讲师，主要研究方向：汽车材料、表面工程应用等， email ： mashuo@whut.edu.cn 基金项目： 2013 新疆维吾尔自治区教育厅课题（新教职成 18 号）