摘要
通过运用定量金相方法得到了低合金钢A537及不锈钢1Cr18Ni9Ti在含Cl^-溶液中点蚀坑的几何参数,然后用统计回归方法对五种常见的分布函数进行了筛选。结果证明,对效正态分布是点蚀几何参数分布的最佳数学形式。根据实验结果还提出了点蚀坑产生和发展的随机过程模型,解释了点蚀统计分布及其演化规律。此外实验还证实了Pickering的点蚀演化理论。
Being immersed in aqueous solution with Cl^- ions,specimens made from a iow alloy steel (A537cl1)or from a stainless steel (1Cr18Ni9Ti)were tested under cyclic liad. Thetests were interrupted on schedule to measure the diameters and depths of the pits on the surfaces of the specimens. Then, by using non-linear regression method,these experimental data were expressed with five kinds of probability distribution functions. Among them lognormal function was demonstrated to be the optimal distribution function with the highest correlation coefficient (>0.99). Moreover, the probabilistic distributions and their evolution behaviours seem to coincide with the stochastic model proposed by the authors and pickering's evolution theory of pitting.
出处
《中国腐蚀与防护学报》
CAS
CSCD
1992年第3期227-234,共8页
Journal of Chinese Society For Corrosion and Protection
基金
国家自然科学基金
