Microstructure and Rust Layer of Bridge Weathering Steels Containing Mn and Ni under the Condition with Cl-1(Z290)

摘要：

　　Optical microscope together with alternative wet-dry cyclic accelerated corrosion tests and XRD,SEM were employed on bridge weathering steel samples with different Mn and Ni contents which were vacuum induction melted and rolled to study their effects on the microstructure and rust layer evolution in Cl-1 containing condition.The results show that the microstructure is mainly ferrite and pearlite when Mn and Ni contents are 0.75%,0.42%,respectively.Both the increase of Mn and Ni contents will make pearlite disappear while granular bainite appear,meanwhile the grain size decreases.With the increase of Mn content,the corrosion rate decreases in the initial stage,but the effect becomes little in the later stage.The increase of Ni not only improves the corrosion resistance of steel base at the initial stage but also hinders the tendency of further corrosion.As Mn content increases,α-FeOOH contents in rust layer decreases.With increase of Ni content,the content of α-FeOOH in the rust increases while that of γ-FeOOH decreases.

关键词： weathering steel marine atmosphere microstructure corrosion resistance performance rust layer

作者: FU Gui-qin JIN Duo GAO Xin-liang WANG Li ZHU Miao-yong

作者单位: School of Materials and Metallurgy,Northeastern University,Shenyang 110819,China

会议类型: 国际会议

会议名称: Asia Steel International conference 2012(第五届亚洲钢铁大会)

会议地点: 北京

会议语种:英文

页码: 1-6

在线出版日期: 2012-09-23（万方平台首次上网日期，不代表论文的发表时间）