Experimental and Localisation Method for Non-Destructive Testing of Cable Corrosion Based on Weak Magnetic Imaging
Yujie Wu, Runchuan Xia, Yuanzheng Feng, Youjia Yang, Houxuan Li, Mingyang Li
TL;DR
This paper introduces a new non-destructive method using weak magnetic imaging to detect and locate corrosion in steel cables.
Contribution
A novel weak magnetic imaging method using adaptive threshold K and linear interpolation for corrosion detection in cables.
Findings
Axial corrosion length shows a strong linear relationship (R2 = 0.998) with the peak-to-trough distance of Bz.
Circumferential corrosion width correlates with the circumferential distribution range of Bz.
Adaptive threshold K effectively delineates corrosion boundaries for precise localization.
Abstract
In order to address the challenge of accurately identifying the extent of corrosion in parallel steel wire cables, a series of corrosion detection tests were performed on parallel wire bundles with varying degrees of corrosion. Following the collection of weak magnetic signals from a 12-channel Hall array, the influence patterns of corrosion severity on the distributions (Bx, Bz) of leakage magnetic signals were analysed. The experimental results were validated by means of a three-dimensional finite element model, leading to the proposal of a novel weak magnetic imaging method based on the fusion of adaptive threshold K and linear interpolation. The findings of the study demonstrate a strong linear relationship (R2 = 0.998) between axial corrosion length and the peak-to-trough distance of the normal component Bz. Furthermore, it was determined that a positive correlation exists between…
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Taxonomy
TopicsNon-Destructive Testing Techniques · Mechanical stress and fatigue analysis · Ultrasonics and Acoustic Wave Propagation