新型低碳贝氏体钢在含氯离子环境中的腐蚀行为和表观力学性能的变化  

CORROSION BEHAVIOR AND VARIATION OF APPARENT MECHANICAL PROPERTY OF A NOVEL LOW CARBON BAINITIC STEEL IN ENVIRONMENT CONTAINING CHLORIDE IONS

作　　者：王树涛[1] 杨善武[1] 高克玮[1] 沈晓安[2] 贺信莱[1] 

机构地区：[1]北京科技大学材料物理与化学系,北京100083 [2]浙江工业大学浙西分校,衢州324000

出　　处：《金属学报》2008年第9期1116-1124,共9页Acta Metallurgica Sinica

基　　金：国家重点基础研究发展计划项目2004CB619102;新世纪优秀人才支持计划项目资助~~

摘　　要：利用周浸加速腐蚀实验与力学性能实验对比研究了新型低碳贝氏体钢、超低碳铁素体钢以及09CuPCrNi钢这3种钢在含氯离子环境中的耐腐蚀性能与拉伸性能的变化.与超低碳铁素体钢和09CuPCrNi钢相比,新型低碳贝氏体钢不仅力学性能提高了,而且耐腐蚀性能亦得到改善,其腐蚀速率明显低于其余2种对比钢,并且随着腐蚀时间的延长其优势更加明显.3种钢的锈层具有相近的相组成,但新型低碳贝氏体钢的腐蚀产物颗粒最细小且锈层最致密,同时在接近钢基体的锈层处Cr和Cu的富集程度最明显且Cl的含量最低.新型低碳贝氏体钢锈层阻碍氯离子透过能力高于其余2种对比钢锈层.The corrosion resistances of a novel low carbon bainitic steel, ultra-low carbon ferritic steel and 09CuPCrNi steel were studied in environment containing chloride ions through alternate wet-dry accelerated corrosion test, while mechanical properties were also tested after corrosion. The bainitic steel possesses not only excellent mechanical property but also excellent corrosion resistance. The corrosion rate of the bainitic steel is obviously lower than that of the other two steels and its advantage is increasing with corrosion time. The phase constituents of the rust layers of the three kinds of steels are similar, while corrosion products of the bainitic steel consist of the finest and most compact particles. The enrichments of Cr and Cu in the rust layer near the matrix of the bainitic steel are the most obvious, while the content of chloride is the lowest in the same location. The ability of rust layer in the bainitic steel to block permeation of chloride ions is higher than those of the other two steels.

关 键 词：低碳贝氏体钢 含氯离子的环境 耐腐蚀性能 力学性能 

分 类 号：TG172.3[金属学及工艺—金属表面处理]