摘要
为了得到中性盐雾环境下钢板表面锈蚀深度随机场模型,采用中性盐雾循环试验对10组试件进行加速锈蚀,获得了锈蚀钢板表面轮廓图及锈蚀深度三维坐标数据。研究了锈蚀深度概率分布特性,分析了锈蚀深度均值、标准差与锈蚀率的关系。对锈蚀深度进行了平稳性与各态历经性检验,提出了锈蚀深度随机场自相关函数模型。结果表明:钢板表面锈蚀深度符合正态分布;随锈蚀率的增大,锈蚀深度均值、标准差也增大;钢板表面锈蚀深度具有平稳性与各态历经性;余弦三角函数随机场模型能较精确地表征锈蚀深度分布特征。
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.
作者
孔德亮
聂彪
徐善华
KONG Deliang;NIE Biao;XU Shanhua(School of Civil Engineering,Xi’an University of Architecture&Technology,Xi’an 710055,China;Key Lab of Engineering Structural Safety and Durability(XAUAT),Xi’an 710055,China)
出处
《材料导报》
EI
CAS
CSCD
北大核心
2021年第20期20099-20105,共7页
Materials Reports
基金
国家自然科学基金(51678477)
国家自然科学基金青年基金(51908455)。
关键词
中性盐雾环境
锈蚀深度
随机场
形貌图
正态分布
neutral salt fog environment
corrosion depth
stochastic field
surface topography
normal distribution
