中性盐雾环境下钢板表面锈蚀深度随机场模型

doi:10.11896/cldb.20100284

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Abstract The stochastic model of corrosion depth of steel plate in neutral salt spray environment was studied. 10 groups of specimens were subjected to accelerated corrosion by the neutral salt spray test. The surface topography of corroded steel plate and the 3D data of corrosion depth were measured. The probability distribution characteristics of corrosion depth were investigated and the relationship between the mean and stan-dard deviation of corrosion depth and corrosion rate were analyzed. The corrosion depth was tested for ergodicity and stationary and the autocorrelation function model of corrosion depth random field was proposed. The results of the study show that the corrosion depth of steel plate in neutral salt spray environment fitted the normal distribution. With the increase of corrosion rate, the mean and standard deviation of the corrosion depth increase. The corrosion depth on surface of steel plate has the ergodicity and stationary. The stochastic model of cosine trigonometric function can accurately characterize the distribution of corrosion depth.

Key words： neutral salt fog environment corrosion depth stochastic field surface topography normal distribution

Published: 12 November 2021

CLC number:

TU511.3+5

Fund:National Natural Science Foundation of China (51678477), the National Natural Science Foundation Youth Fund of China (51908455).

Corresponding Authors: xushanhua@163.com

About author:: Deliang Kong, graduated from Xi’an University of Architecture & Technology with a master’s degree in structural engineering in June 2014. Now studying for a doctorate degree in structural engineering from Xi’an University of Architecture & Technology, mainly engaged in the research of steel structure durability.
Shanhua Xu obtained his Ph. D. degree in structure engineering from Xi’an University of Architecture and Technology in 2003. He is currently a professor,doctoral 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 scienti-fic 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.

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Cite this article:

KONG Deliang,NIE Biao,XU Shanhua. Stochastic Model of Corrosion Depth on Surface of Steel Plate in Neutral Salt Fog Environment[J]. Materials Reports, 2021, 35(20): 20099-20105.

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http://www.mater-rep.com/EN/10.11896/cldb.20100284 OR http://www.mater-rep.com/EN/Y2021/V35/I20/20099

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