模拟海洋和一般大气环境下锈蚀钢材表面形貌差异研究

doi:10.11896/cldb.19110139

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Abstract In order to investigate the difference in surface characteristics of corroded steel under simulated marine atmosphere and simulated general atmosphere environment, two accelerated corrosion tests were carried out. The corrosion morphology was obtained by a non-contact 3D profiler PS50. By extracting the average pit depth h, the average aspect ratio A_r, the pit density P_d and calculating the corrosion parameters such as the root mean square height S_q、the developed interfacial area ratio S_dr and the fractal dimension D, the evolution of corrosion and the environment effects were studied. The results show that compared with the specimens in the simulated general atmosphere environment, those in the simulated marine atmosphere environment have a smaller h and a larger A_r, which refers to shallower and narrower pits; the roughness parameters S_q, S_dr and D of the specimens in the simulated marine atmosphere environment are larger than those in the simulated general atmospheric environment, which means a greater height difference, fold area and more significant changes in topographic amplitude; the specimens in the simulated marine atmosphere environment have concentrated pits and local corrosion is significant while the specimens in the simulated general atmosphere environment have scattered pits and are more inclined to overall corrosion.

Key words： surface morphology non-uniform volume loss ratio pit analysis roughness parameter

Published: 28 January 2021

CLC number:

TU511

Fund:The National Natural Science Foundation of China (51678477).

About author:: Shanhua Xuobtained his Ph.D. degree in structure engineering from Xi’an University of Architecture and Technology in 2003. He is currently a professor,docto-ral supervisor and academic leader in structural engineering of Xi’an University of Architecture and Technology. He is mainly engaged in the study of durability of concrete structures and steel structures, and he has published more than 100 journal papers. He has taken charge of several scientific research projects, including 4 scientific research projects financially supported by National Natural Science Foundation of China,1 project financially supported by National Key Research and Development Program of China,and 1 project financially supported by Chinese Postdoctoral Science Foundation,and so on.
Han Li, doctoral candidate of structural engineering, School of Civil Engineering, Xi’an University of Architecture and Technology, mainly studying the corroded surface evaluating, the CFRP reinforced corroded steel structures and the durability of CFRP-steel reinforcement systems.

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Cite this article:

XU Shanhua,SONG Cuimei,LI Han. Difference in Surface Characteristics of Corroded Steel Under Simulated Marine and General Atmosphere Environment[J]. Materials Reports, 2021, 35(2): 2125-2132.

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http://www.mater-rep.com/EN/10.11896/cldb.19110139 OR http://www.mater-rep.com/EN/Y2021/V35/I2/2125

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