Essential role of element Si in corrosion resistance of a bridge steel in chloride atmosphere

被引：55

作者：

Liu, Haixia ^{[1
,2
]}

Huang, Feng ^{[1
,2
]}

Yuan, Wei ^{[1
,2
]}

Hu, Qian ^{[1
,2
]}

Liu, Jing ^{[1
,2
]}

Cheng, Y. Frank ^{[3
]}

机构：

[1] Wuhan Univ Sci & Technol, State Key Lab Refractories & Met, Wuhan 430081, Hubei, Peoples R China

[2] Wuhan Univ Sci & Technol, Hubei Engn Technol Res Ctr Marine Mat & Serv Safe, Wuhan 430081, Hubei, Peoples R China

[3] Univ Calgary, Dept Mech Engn, Calgary, AB T2N 1N4, Canada

来源：

CORROSION SCIENCE | 2020年 / 173卷

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

Corrosion resistance; Si element; Chloride atmospheric; Bridge steel; LOW-ALLOY STEELS; WEATHERING STEEL; RUST LAYER; BEHAVIOR; NI; CR; CU; PERFORMANCE; SURFACE; IRON;

D O I：

10.1016/j.corsci.2020.108758

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The role of element Si in corrosion of a bridge steel was investigated in chloride atmosphere. The effect of Si addition on steel corrosion depends on the Si content and testing time. For Si-containing steels, the corrosion resistance is enhanced due to formation of SiO2 with a network structure, facilitating alpha-FeOOH formation, the reduction of the anion selectivity and enrichment of Cu and Cr in the inner rust layer. However, after long-term testing, for 0.32Si and 0.40Si steels, the unstable silicon-oxytetrahedron compound with Q(1) bond is formed, making the rust layer loose and porous, the corrosion resistance of steels reduces.

引用

页数：18

共 40 条

[1] Effect of Cu, Cr and Ni alloying elements on mechanical properties and atmospheric corrosion resistance of weathering steels in marine atmospheres of different aggressivities [J].