ABSTRACT
In this study, a non-destructive quantitative characterization method for the probability distribution of minimum cross-sectional areas of corroded steel bars was proposed based on the dynamic linkage mechanism of the induced magnetic and self-magnetic flux leakage fields variation of steel bars. The experiment data of 28 corroded steel bars were employed to verify this method. The results indicate that the quantitative self-magnetic flux leakage variation ratio dH had a linear correlation with the cross-sectional area unevenness degree dSn with a ratio of about 1. Based on the index dSn and cross-sectional area ratio K that obey the Weibull distribution and Gamma distribution, respectively, the probability distribution of minimum cross-sectional area Smin in a certain segment of corroded steel bars can be confirmed.
