Stochastic Model of Corrosion Depth on Surface of Steel Plate in Neutral Salt Fog Environment
KONG Deliang1,2, NIE Biao1,2, XU Shanhua1,2
1 School of Civil Engineering, Xi’an University of Architecture & Technology, Xi’an 710055, China 2 Key Lab of Engineering Structural Safety and Durability(XAUAT), Xi’an 710055, China
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.
孔德亮, 聂彪, 徐善华. 中性盐雾环境下钢板表面锈蚀深度随机场模型[J]. 材料导报, 2021, 35(20): 20099-20105.
KONG Deliang, NIE Biao, XU Shanhua. Stochastic Model of Corrosion Depth on Surface of Steel Plate in Neutral Salt Fog Environment. Materials Reports, 2021, 35(20): 20099-20105.
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2021, Vol. 35 
