南海洋,刘慧丛,李卫平,朱立群,张健,杜凡.烧结NdFeB 材料镀层失效的分析和预防[J].表面技术,2017,46(4):12-15.
NAN Hai-yang,LIU Hui-cong,LI Wei-ping,ZHU Li-qun,ZHANG Jian,DU Fan.Failure Analysis and Prevention of Coating on Sintered NdFeB[J].Surface Technology,2017,46(4):12-15 |
| 烧结NdFeB 材料镀层失效的分析和预防 |
| Failure Analysis and Prevention of Coating on Sintered NdFeB |
| 投稿时间：2016-12-29 修订日期：2017-04-20 |
| DOI：10.16490/j.cnki.issn.1001-3660.2017.04.003 |
| 中文关键词: NdFeB 镀层 植酸衍生物 腐蚀 缓蚀 吸附 |
| 英文关键词:NdFeB coating phytic acid derivatives corrosion corrosion inhibition adsorption |
| 基金项目:国家自然科学基金资助项目（U1637204） |
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| Author | Institution |
| NAN Hai-yang | Beihang University, Beijing 100191, China |
| LIU Hui-cong | Beihang University, Beijing 100191, China |
| LI Wei-ping | Beihang University, Beijing 100191, China |
| ZHU Li-qun | Beihang University, Beijing 100191, China |
| ZHANG Jian | Jingci Material Science Co., Ltd, Beijing 101300, China |
| DU Fan | Jingci Material Science Co., Ltd, Beijing 101300, China |
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| 中文摘要: |
| 目的 研究烧结NdFeB材料镀层失效的问题。方法 通过SEM和电化学的测试方法，包括极化曲线、交流阻抗和零电荷电势等确定失效的主要原因是镀层内部NdFeB的腐蚀，降低了镀层结合力。结果 植酸衍生物可以有效抑制镀层内部的腐蚀。吸附能 为27.93 kJ/mol，表明这种吸附是以物理吸附为主，化学吸附为辅。结论 缓蚀作用机制主要是植酸衍生物分子吸附在NdFeB表面，阻止了腐蚀的发生。 |
| 英文摘要: |
| The work aims to study failure of coating on sintered NdFeB. Aided by SEM and electrochemical test methods including polarization curves, AC impedance and zero charge potential, main reason was testified to be NdFeB corrosion inside the coating, which reduced the coating adhesion. Phytic acid derivatives could efficiently inhibit corrosion inside the coating. The was 27.93 kJ/mol. The was mainly physical adsorption and partly chemical adsorption. The corrosion inhibition mechanism is the adsorption of phytic acid derivatives on NdFeB, which prevents the occurrence of corrosion. |
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