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Fe_(2)O_(3)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。
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 Fe_(2)O_(3) and someγ-FeOOH.With the extension of corrosion time,the content ofγ-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.
作者
李宾
吴毅
尹鸿祥
金莹
朱金阳
LI Bin;WU Yi;YIN Hongxiang;JIN Ying;ZHU Jinyang(National Center for Materials Service Safety,Beijing 100083,China;Metal and Chemistry Research Institute,China Academy of Railway Sciences Co.,Ltd.,Beijing 100081,China)
出处
《腐蚀与防护》
CAS
CSCD
北大核心
2023年第6期47-54,共8页
Corrosion & Protection
基金
国家重点研发计划课题资助项目(2017YFB0304605)。
关键词
耐候钢
车体钢
锈层
大气腐蚀
weathering steel
train body steel
rust layer
atmospheric corrosion
