Influence of Ultraviolet Light and Alternating Wet-Dry Environments on the Corrosion Behavior of Weathering Steels

被引：0
|
作者：
Yang, Ying [1 ,2 ]
Wang, Yubo [1 ,2 ]
Du, Xinyu [3 ]
Lin, Tianzi [1 ,2 ]
Wang, Han [3 ]
Meng, Fandi [3 ]
Wang, Fuhui [3 ]
机构：
[1] State Key Lab Met Mat Marine Equipment & Applicat, Anshan 114009, Peoples R China
[2] Iron & Steel Res Inst, Anshan Iron & Steel Grp, Anshan 114009, Peoples R China
[3] Northeastern Univ, Shenyang Natl Lab Mat Sci, Wenhua Rd 3-11, Shenyang 110819, Peoples R China
来源：
MATERIALS | 2024年 / 17卷 / 15期
基金：
中国国家自然科学基金;
关键词：
weathering steel; ultraviolet; alternating wet and dry conditions; ATMOSPHERIC CORROSION; CARBON-STEEL;
D O I：
10.3390/ma17153870
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The corrosion behaviors of two bridge steels (Q345q and Q500q) under simulated ultraviolet irradiation and a wet-dry alternating (UVWD) environment were studied. Weight loss measurement, stereomicroscope observation, SEM, XRD, and electrochemical impedance spectroscopy (EIS) were performed to investigate the influence of the coupled environment. The results revealed that the corrosion rates of Q345q and Q500q were significantly accelerated by the synergistic effect of UV light exposure and alternating wet-dry conditions. Numerous voids and cracks could be observed throughout the thickened rust layers, enabling the corrosive substances to easily penetrate through the rust layer. Q500q exhibited better corrosion resistance than Q345q due to the addition of Mo, Cr, and Ni as corrosion-resistant elements, which tended to transform the rust layer into alpha-FeOOH rather than gamma-FeOOH during later stages of corrosion.
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页数：15
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