基于形貌的结构钢锈蚀评价指标及提取方法

doi:10.11896/cldb.20070143

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Abstract Through summarizing and analyzing the existing corrosion evaluation indicators, an evaluation indicators system for corrosion degree of structural steel were put forward. A three-dimensional non-contact profiler was employed to measure the surface morphology of artificially accele-rated corroded steel plates, and a morphology-based method to extract the corrosion indicators was proposed accompanied with a corresponding calculation algorithm. Through the statistical analysis of extracted results, it was found that with the increase of corrosion age, the corrosion da-mage parameter D_n gradually increased, and the minimum cross-sectional area A_ma and the corrosion grade parameter φ gradually decreased. All test pieces were in the state of “slight corrosion”. Besides, the mean value of corrosion depth Δt_ave, the standard deviation of corrosion depth t_sd, the pit depth h and its distribution range were gradually increased, and the pit density P_d was gradually reduced. Meanwhile, the shape of pits was gradually changed from a cylinder or hemisphere to a cone.

Key words： corrosion structural steel morphology evaluation indicators extraction method

Published: 07 September 2021

CLC number:

TU511.3

Fund:Natural Science Foundation of China (51908455), the China Postdoctoral Science Foundation (2021M692511) and the Scientific Research Project of Shaanxi Education Department (19JS042).

About author:: Youde Wangreceived his Ph.D. degree in 2018 from Xi'an University of Architecture and Technology. He is currently an associate professor and a young core member of the research team of “Engineering Structure Durability and Lifetime Maintenance” of Xi'an University of Architecture and Technology. His research focuses on the durability of steel structure, seismic and fatigue performance of corrosion damaged steel structures, and new technology to improve the performance of existing steel structure. He has taken charge of several scientific research projects, including one Youth Project of National Natural Science Foundation of China and two General Project of China Postdoctoral Science Foundation. He has published more than 30 journal papers, and won two first-class prizes of Ministerial and Provincial-Level Science and Technology Awards and two first-class prizes of Department-Level Science and Technology Awards.

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	WANG Youde
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Cite this article:

WANG Youde,SHI Tao,XIA Min, et al. Corrosion Evaluation Indicators and Extraction Method of Structural Steel Based on Morphology[J]. Materials Reports, 2021, 35(16): 16138-16143.

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http://www.mater-rep.com/EN/10.11896/cldb.20070143 OR http://www.mater-rep.com/EN/Y2021/V35/I16/16138

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