Difference in Surface Characteristics of Corroded Steel Under Simulated Marine and General Atmosphere Environment
XU Shanhua1, SONG Cuimei1,2, LI Han1
1 School of Civil Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China; 2 Wuhan Zhenghua Architectural Design Co., Ltd., Wuhan 430000, China
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 Ar, the pit density Pd and calculating the corrosion parameters such as the root mean square height Sq、the developed interfacial area ratio Sdr 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 Ar, which refers to shallower and narrower pits; the roughness parameters Sq, Sdr 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.
徐善华, 宋翠梅, 李晗. 模拟海洋和一般大气环境下锈蚀钢材表面形貌差异研究[J]. 材料导报, 2021, 35(2): 2125-2132.
XU Shanhua, SONG Cuimei, LI Han. Difference in Surface Characteristics of Corroded Steel Under Simulated Marine and General Atmosphere Environment. Materials Reports, 2021, 35(2): 2125-2132.
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2021, Vol. 35 
