S450AW与Q450NQR1在酸性环境中的腐蚀行为  

Corrosion Behaviors of S450AW and Q450NQR1 in Acidic Medium

作　　者：郭晓宏 张哲 张瑞琦 刘志伟 刘贤斌[2] 韩恩厚[2,3] GUO Xiao-hong;ZHANG Zhe;ZHANG Rui-qi;LIU Zhi-wei;LIU Xian-bin;HAN En-hou(Ansteel Group Research Institute,Anshan 114021,China;Laboratory for Corrosion and Safety Assessment of Petrochemical Materials Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;National Center for Materials Service Safety,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]鞍钢集团钢铁研究院,辽宁鞍山114021 [2]中国科学院金属研究所石油化工材料腐蚀安全评价实验室,辽宁沈阳110016 [3]北京科技大学国家材料服役安全科学中心,北京100083

出　　处：《材料保护》2020年第4期23-28,共6页Materials Protection

基　　金：国家重点研发计划(2017YFB0304600);国家自然科学基金(51501199)资助。

摘　　要：S450AW是继Q450NQR1后新开发的屈服强度为450 MPa级的耐蚀铁路车辆用钢,为考察其主要性能指标——耐腐蚀性能,采用全浸试验、电化学测试和扫描电镜观察对比研究了耐蚀钢S450AW和Q450NQR1在饱和氧酸性环境介质中的腐蚀行为。结果表明:浸泡24 h,S450AW钢的平均腐蚀速率是Q450NQR1钢的43%,良好的耐蚀性能归功于其致密的腐蚀产物膜层和锑元素与其他耐蚀合金元素的综合作用。在饱和氧酸性介质中S450AW和Q450NQR1钢表面腐蚀产物膜层经过48 h浸泡达到稳定,致使S450AW和Q450NQR1的腐蚀速率均有所降低。S450AW is a new developed anti-corrosion steel with a yield strength of 450 MPa instead of Q450NQR1 that used in railway vehicles. In order to evaluate the corrosion resistance (main performance index),the corrosion behaviors of S450AW and Q450NQR1 in saturated oxygen acid medium were studied by immersion test,electrochemical measurement and scanning electron microscope observation.Results showed that the average corrosion rate of S450AW steel was 43% of that of Q450NQR1 steel after 24 h immersion,and the good corrosion resistance was due to its dense corrosion product film layer and the combination of antimony and anti-corrosion alloy elements in S450AW steel. Moreover,in saturated oxygen acid medium,the surface corrosion product films of S450AW and Q450NQR1 became stable after 48 h immersion,and therefore the corrosion rates of S450AW and Q450NQR1 both decreased.

关 键 词：耐候钢 耐腐蚀性能 饱和氧酸性环境 电化学 全浸试验 SEM XPS 

分 类 号：TG174.3[金属学及工艺—金属表面处理]