W450QN钢大气腐蚀性能  

Atmospheric Corrosion Performance of W450QN Steel

作　　者：刘建容[1] 张万灵[1] 蔡捷[1] 石争鸣[1] 陈吉清[1] 

机构地区：[1]武汉钢铁集团公司研究院,武汉430080

出　　处：《腐蚀与防护》2011年第4期305-307,共3页Corrosion & Protection

摘　　要：对武钢生产的W450QN钢进行了3年的大气暴露试验,结果表明,W450QN钢的耐蚀性优于Q345钢,在青岛站、江津站、琼海站,W450QN钢与Q345钢相比,平均腐蚀速率之比分别为1:1.48,1:1.45,1:1.44。带锈样的极化曲线测试结果显示,W450QN钢的致钝电流密度、维钝电流密度均比Q345钢小,说明其锈层致密、传质能力差,所以防护性能好。Three years atmospheric corrosion of W450QN steel made by Wuhan Iron ＆ Steel （Group） Corp was carried out. The results＇ show that the corrosion resistance of W450QN was better than that of Q345, the average corrosion rate in Qingdao, Jiangjin and Qionghai decreased by a third compared with that of Q345. The polarization curves of 3-year exposed rusty steel showed that both of the initial passivity current and maintaining passivity current of W450QN were smaller than those of Q345, indicating a better protective perfornlance of W450QN due to its compact rust layer and higher mass transfer resistance.

关 键 词：耐候钢 大气腐蚀 锈层 

分 类 号：TG172.3[金属学及工艺—金属表面处理]