WANG Hong*,LIU Jichao.Effect of Sealing Treatment on Corrosion Resistance of Electroless Ni-Co-P Coating on NdFeB Permanent Magnetic Material[J].Plating & Finishing,2020,(11):5-9.[doi:10.3969/j.issn.1001-3849.2020.11.0020]
封孔处理对钕铁硼永磁材料化学镀Ni-Zn-P镀层耐蚀性的影响
- Title:
- Effect of Sealing Treatment on Corrosion Resistance of Electroless Ni-Co-P Coating on NdFeB Permanent Magnetic Material
- 关键词:
- 封孔处理; 化学镀Ni-Zn-P镀层; 钕铁硼永磁材料; 耐蚀性
- Keywords:
- sealing treatment electroless Ni-Zn-P coating NdFeB permanent magnet material corrosion resistance
- 文献标志码:
- A
- 摘要:
- 在钕铁硼永磁材料表面化学镀Ni-Zn-P镀层，为了进一步提高镀层耐蚀性，镀后进行封孔处理。在封孔过程中，采用不同方式搅拌封孔液，表征了封孔处理前后镀层的表面形貌和孔隙率，并测量了封孔处理前后镀层的极化曲线和阻抗谱。结果表明：采用磁力和超声波搅拌封孔液，封孔处理后镀层与未封孔镀层相比表面的微孔数量明显减少，孔隙率降低，对腐蚀介质的敏感性和腐蚀倾向性减弱，耐蚀性明显提高。相比之下，在封孔过程中采用超声波搅拌封孔液能实现更好的封孔效果，封孔处理后镀层的孔隙率最低，约为1.04%，其耐蚀性更好。
- Abstract:
- Electroless Ni-Zn-P coating was deposited on the surface of NdFeB permanent magnet material, and sealing treatment was carried out in order to further improve the corrosion resistance of the coating. Different methods were used to stir the sealing solution in the process of coating sealing. The surface morphology and porosity of the coating before and after sealing treatment were characterized, and the polarization curve and impedance spectrum of the coating before and after sealing treatment were measured. The results showed that when the sealing solution was stirred by magnetic force and ultrasonic wave, the number of micropores on the surface of the coating and the porosity of the coating after sealing treatment were significantly reduced compared with that of the coating before sealing treatment. The sensitivity and corrosion tendency to corrosive medium were weakened, indicating that the corrosion resistance of the coating after sealing treatment was obviously improved. In contrast, using ultrasonic to stir the sealing solution can achieve better sealing treatment effect, the coating after sealing treatment possessed the lowest porosity about 1.04% and much better corrosion resistance.
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备注/Memo
收稿日期： 2020-05-27；修回日期： 2020-07-04
通信作者： 王宏，wanghong0607@126.com
基金项目： 河北省青年