Corrosion characteristics of Q690qE high-strength bridge steel in simulated coastal-industrial environment and its influence on mechanical and corrosion fatigue behaviors

被引：30
作者：
Cai, Jiaxing [1 ,2 ]
Sun, Liyang [1 ]
Ma, Hongchi [1 ]
Li, Xiaogang [1 ]
机构：
[1] Univ Sci & Technol, Inst Adv Mat & Technol, Natl Mat Corros & Protect Data Ctr, Key Lab Corros & Protect MOE, Beijing 100083, Peoples R China
[2] Nanjing Iron & Steel United Co Ltd, Nanjing 210035, Jiangsu, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2022年 / 341卷
基金：
中国国家自然科学基金;
关键词：
Q690qE; High-strength bridge steel; Coastal-industrial environment; Wet-dry alternating corrosion; Corrosion fatigue; LIFE PREDICTION; ATMOSPHERIC CORROSION; WEATHERING STEEL; CRACKING BEHAVIOR; PITTING CORROSION; CARBON-STEEL; E690; STEEL; EVOLUTION; MODEL;
D O I：
10.1016/j.conbuildmat.2022.127830
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
The corrosion behavior of Q690qE high-strength bridge steel in simulated coastal-industrial environment was investigated through accelerated corrosion, and the corrosion features under different corrosion times were characterized. The effect of pre-corrosion level on mechanical and corrosion fatigue behaviors was also studied by using pre-corroded fatigue samples. Results show that corrosion pits were more likely to form in this environment, with chloride ions concentrating at the bottom of the pits, resulting in significant loss of the mechanical property and corrosion fatigue life. The corrosion fatigue initiation mechanism was proposed, and a prediction model for the residual corrosion fatigue life of corroded Q690qE steel was developed.
引用
收藏
页数：17
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