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评估超导MagLev原型的NdFeB轨道中的腐蚀

Ana Laura D M Campista¹, Richard M Stephan², Simone L D C Brasil¹

¹School of Chemistry, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro 21941-909, Rio de Janeiro, Brazil.

|November 24, 2025

概括

研究了磁铁轨道中铁 (NdFeB) 磁铁的腐蚀. 形成了一层保护层,但在60天后脱离,导致材料损失并重新启动腐蚀过程.

科学领域:

材料科学材料科学材料科学
腐蚀工程腐蚀工程
运输技术运输技术运输技术

背景情况:

铁 (NdFeB) 磁铁是超导磁悬浮 (Maglev) 车辆轨道中的关键部件.
了解这些磁铁的长期耐用性和降解对于运行安全和维护至关重要.

研究的目的:

为了评估Maglev轨道中使用的NdFeB磁铁中腐蚀过程的进展.
确定影响磁体降解的环境因素和电解质成分.

主要方法:

定期对磁悬浮轨道进行现场检查,包括视觉分析和温度测量.
使用离子色谱,pH和导电性分析收集和描述腐蚀产品和雨水.
实验室模拟包括实验室测试,电化学极化和浸泡测试,然后对NdFeB样品进行SEM和EDS分析.

主要成果:

雨水分析确定了影响磁铁的关键电解质成分.
浸泡测试显示了 NdFeB 磁铁中的逐渐腐蚀过程.
45天后形成的一致的被动化层,但在60天后脱离,导致新的腐蚀和材料损失.

结论:

在模拟暴露条件下,NdFeB磁铁上形成的被动层是暂时的,寿命约为60天.
被动层的循环形成和脱离表明磁悬浮轨道组件的持续降解机制.
需要进一步的研究来开发针对观察到的腐蚀模式的保护策略.

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