一种新开发的车体钢S500AW在户外大气环境中的腐蚀行为及寿命预测
Corrosion Behavior and Life Prediction of A Newly Developed Train Body Steel S500AW in Outdoor Atmospheric Environment
摘 要
通过大气暴晒试验结合室内加速腐蚀试验,研究了新开发的车体钢S500AW和用于对比的传统Q450NQR1钢及Q345B钢的早期腐蚀行为,采用扫描电镜(SEM)、拉曼光谱仪,分析了试验前后试样表面的腐蚀形貌和腐蚀产物成分。结果表明:在北京大气环境暴露初期,S500AW钢表面更为平整光洁,仅有少量尘埃颗粒附着物,耐蚀性更优异;腐蚀产物为Fe2O3和一定量的γ-FeOOH,随着腐蚀时间的延长,γ-FeOOH含量逐渐增加,钢的耐蚀性逐渐提高;以腐蚀质量损失数据为参照,建立铁路车辆车体用钢腐蚀试验方法和腐蚀寿命预测模型,通过灰色关联度分析方法,证实了周期浸润试验与户外自然环境大气暴露试验良好的相关性。
车体钢
锈层
大气腐蚀
weathering steel
train body steel
rust layer
atmospheric corrosion
Abstract
The early corrosion behavior of newly developed train body steel S500AW and traditional Q450NQR1 steel and Q345B steel for comprision was studied by atmospheric exposure test combined with indoor accelerated corrosion test. The corrosion morphology and corrosion product composition on surface of the sample before and after the test were analyzed by scanning electron microscopy ( SEM ) and Raman spectrometer. The results showed that the surface of S500AW steel was smoother and cleaner in the early stage of exposure in Beijing atmospheric environment, with only a small amount of dust particles attached, and the corrosion resistance was better. The corrosion product was Fe2O3 and some γ-FeOOH. With the extension of corrosion time, the content of γ-FeOOH increased gradually, and the corrosion resistance of steel increased gradually. Based on the data of corrosion mass loss, the corrosion test method and corrosion life prediction model of steel for railway vehicle body were established. Through the grey correlation analysis method, the good correlation between periodic wetting test and outdoor natural environment atmospheric exposure test was confirmed.
中图分类号 TG174.4 DOI 10.11973/fsyfh-202306008
所属栏目 试验研究
基金项目 国家重点研发计划课题资助项目(2017YFB 0304605)
收稿日期 2021/7/12
修改稿日期
网络出版日期
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联系人作者吴毅(wuyi930@163.com)
引用该论文: LI Bin,WU Yi,YIN Hongxiang,JIN Ying,ZHU Jinyang. Corrosion Behavior and Life Prediction of A Newly Developed Train Body Steel S500AW in Outdoor Atmospheric Environment[J]. Corrosion & Protection, 2023, 44(6): 47
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