何成刚,刘海乔,俞茹昕,王欣纪,刘吉华,黄光润,宋智博

• 1:五邑大学轨道交通学院
• 2:江门市轨道交通智能运维与应急管理重点实验室
• 3:五邑大学机械与自动化工程学院

摘要(Abstract)：

为了解高速车轮材料在服役中的大气腐蚀机理，采用中性盐雾试验模拟海洋大气环境研究了ER8车轮的初期腐蚀行为，采用便携式显微镜，扫描电镜(SEM)、X射线衍射仪(XRD)和电化学测试等表征了中性盐雾试验后ER8车轮的腐蚀产物形貌、腐蚀速率及电化学行为。结果表明：ER8车轮试样在24～48 h腐蚀前期以均匀腐蚀为主，48 h后的腐蚀中后期以点蚀为主。通过质量损失测试可知随着腐蚀时间的增加，ER8车轮的平均腐蚀速率呈持续增加的趋势，但在144 h后趋于稳定。试样表面腐蚀产物以γ-FeOOH、α-FeOOH和Fe_3O_4为主，144 h前腐蚀产物对基体不具备保护作用，而144 h后腐蚀产物层结构逐渐稳定保护作用得到提升。电化学阻抗谱(EIS)与极化曲线(Tafel)的测量结果表明ER8车轮在中性盐雾环境下耐腐蚀性能呈先减小后增加的趋势，与上述结果有较好的一致性。

关键词(KeyWords)： 高速车轮;盐雾试验;腐蚀行为;腐蚀产物;电化学

Abstract:

Keywords:

基金项目(Foundation): 广东省基础与应用基础研究基金项目(2024A1515011409);; 广东省教育厅普通高校特色创新项目(2023KTSCX151);; 五邑大学创新创业基金项目(2023CX13);; 江门市基础与理论科学研究类科技计划项目(2023JC01027)

作者(Author): 何成刚,刘海乔,俞茹昕,王欣纪,刘吉华,黄光润,宋智博

DOI: 10.13289/j.issn.1009-6264.2024-0164

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