Guo Haonan,Wang Chunxia*,Liu Hui.Effect of different sealing treatments on the corrosion resistance of zinc nickel phosphate films[J].Plating & Finishing,2024,(1):15-19.[doi:10.3969/j.issn.1001-3849.2024.01.003]
不同封闭处理对锌镍系磷化膜耐蚀性的影响
- Title:
- Effect of different sealing treatments on the corrosion resistance of zinc nickel phosphate films
- Keywords:
- phosphating film ; corrosion resistance ; sealing
- 分类号:
- TG172.8
- 文献标志码:
- A
- 摘要:
- 针对磷化膜表面具有多孔的结构，以 30CrMnSi 钢为基体材料，在经过锌 - 镍系磷化后分别浸入硅酸钠溶液、 671 乳液、市售 4210 封闭剂中进行封闭处理。实验采用电化学工作站、硫酸铜点滴测试、扫描电镜、接触角测量仪来分析封闭处理后的锌镍系磷化膜的形貌、耐蚀性和疏水性。实验结果表明：磷化后未进行封闭处理的磷化膜的膜层表面疏松多孔，这导致其耐蚀性、疏水性较差；硅酸钠封闭处理后，其膜层表面孔洞大多被有效填充且致密性也有明显提高，使磷化膜的耐蚀性略有提高，但其疏水性较差；而 4210 封闭和 671 封闭后，磷化膜表面被覆上一层薄膜，致使磷化膜的耐蚀性和疏水性都有明显提高。经过不同封闭处理后发现，采用 4210 封闭剂可使磷化膜表面覆上一层薄膜且孔洞能被有效填充，这使其耐蚀性及疏水性也较其他封闭处理后有明显改善。 3 种封闭处理都可以在一定程度上增强锌镍系磷化膜的耐腐蚀性能。
- Abstract:
- ： Due to the porous structure on the surface of the phosphating film ， 30CrMnSi steel is used as the base material ， and after zinc nickel phosphating ， 30CrMnSi steel is immersed in sodium silicate solution ， 671 lotion and commercial 4210 sealant for sealing treatment. The morphology ， corrosion resistance and hydrophobicity of zinc nickel phosphating film after sealing treatment were analyzed by electrochemical workstation ， copper （ II ） sulfate drop test ， scanning electron microscope and contact angle meter. The experimental results show that the surface of the phosphating film without sealing treatment is loose and porous ， which leads to poor corrosion resistance and hydrophobicity. After sodium silicate sealing treatment ， most of the holes on the surface of the film are effectively filled and the density is also significantly improved ， which slightly improves the corrosion resistance of the phosphating film ， but its hydrophobicity is poor. After sealing with 4210 and 671 ， the surface of the phosphating film is covered with a thin film ， which significantly improves the corrosion resistance and hydrophobicity of the phosphating film. After different sealing treatments ， it was found that using 4210 sealing agent can cover the surface of the phosphating film with a thin film and effectively fill the pores ， which significantly improves its corrosion resistance and hydrophobicity compared to other sealing treatments. All three sealing treatments can enhance the corrosion resistance of zinc nickel based phosphating films to a certain extent.
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备注/Memo
收稿日期： 2023-07-07 修回日期： 2023-07-20 作者简介： 郭浩男（ 1999 ―），男，硕士研究生， email ： 654126927@qq.com * 通信作者： 王春霞，女，硕士，高级工程师，研究方向：电镀、阳极氧化等， email ： wcx95@163.com?/html>