摘要
为推广新一代铁路车辆用耐候钢,采用周期浸润腐蚀试验方法,对2种铁路用耐候钢Q450AWR5和Q450NQR1进行了腐蚀性能测试,分析了2种耐候钢腐蚀后的失重率,并通过XRD对腐蚀产物进行了物相分析;对二者的裸钢进行了腐蚀磨损试验,并利用白光干涉对腐蚀磨损后的磨痕进行形貌表征,研究了2种钢的耐腐蚀性能及腐蚀环境中的耐磨性能;通过电化学试验方法,对2种耐候钢裸钢进行了电化学腐蚀研究,得到各自的交流阻抗及自腐蚀电流、自腐蚀电压。结果表明:Q450AWR5钢的失重率较小,Q450NQR1钢的失重率较大;在腐蚀环境中,Q450AWR5钢的体积损失率小于Q450NQR1钢,即Q450NQR1钢在同样环境下的耐磨性能更差;电化学试验证明Q450AWR5钢的交流阻抗较大、自腐蚀电流较小,耐腐蚀性能更好,Q450NQR1钢的交流阻抗较小、自腐蚀电流较大,耐腐蚀性能相对较差。
In order to popularize a new generation of weathering steel for railway vehicle,the corrosion properties of two kinds of weathering steel Q450AWR5 and Q450NQR1 for railway were tested by periodic infiltration corrosion test method.The weight loss rate of two kinds of weathering steels after corrosion was analyzed,and the phases of the corrosion products were analyzed by XRD.The corrosion wear tests were carried out on the two bare steels,and the wear marks were characterized by white light interference,the corrosion resistance and wear resistance of two kinds of steel in corrosive environment were studied.The electrochemical corrosion of two kinds of bare weathering steel was studied by electrochemical test method,and the AC impedance,self-corrosion current and self-corrosion voltage were obtained respectively.The results show that the weight loss rate of Q450AWR5 steel is lower than that of Q450NQR1 steel;In the corrosion environment,the volume loss rate of Q450AWR5 steel is lower than that of Q450NQR1 steel,Q450NQR1 steel has the worst wear resistance in the same environment;Electrochemical experiments show that Q450AWR5 steel has the highest AC impedance,the lowest self-corrosion current,and the best corrosion resistance,Q450NQR1 steel has the lowest AC impedance,the highest selfcorrosion current,and the worst corrosion resistance.
作者
吴斯
于惟彬
丛韬
张关震
吴毅
王剑宇
高天硕
王佳音
WU Si;YU Weibin;CONG Tao;ZHANG Guanzhen;WU Yi;WANG Jianyu;GAO Tianshuo;WANG Jiayin(Metals and Chemistry Research Institute,China Academy of Railway Sciences Corporation Limited,Beijing 100081,China;Collaborative Innovation Center of Steel Technology,University of Science and Technology Beijing,Beijing 100083,China;Beijing Freight Transport Center,China Railway Beijing Group Co.,Ltd.,Beijing 100067,China)
出处
《高速铁路新材料》
2023年第2期50-57,共8页
Advanced Materials of High Speed Railway
基金
中国铁道科学研究院集团有限公司科研开发基金项目(2020YJ115)
中国国家铁路集团有限公司科技研究开发计划(J2021J008)。
关键词
铁路车辆
耐候钢
耐腐蚀性能
腐蚀磨损
电化学试验
railway vehicles
weathering steel
corrosion resistance
corrosion wear
electrochemical test
