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Related Experiment Video

Updated: Feb 28, 2026

Applicability Analysis of Assessment Methods for Morphological Parameters of Corroded Steel Bars

Applicability Analysis of Assessment Methods for Morphological Parameters of Corroded Steel Bars

Published on: November 1, 2018

Experimental and Localisation Method for Non-Destructive Testing of Cable Corrosion Based on Weak Magnetic Imaging.

Yujie Wu^1,2, Runchuan Xia^1,2, Yuanzheng Feng^1,2

¹State Key Laboratory of Mountain Bridge and Tunnel Engineering, Chongqing Jiaotong University, Chongqing 400074, China.

Sensors (Basel, Switzerland)

|February 27, 2026

Summary

This study introduces a new weak magnetic imaging method to precisely detect and quantify corrosion in steel wire cables. The technique accurately measures axial length and circumferential width of corrosion, aiding in structural integrity assessments.

Keywords:

corrosion parallel steel wire rope spontaneous magnetic leakage threshold weak magnetic imaging

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Last Updated: Feb 28, 2026

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Area of Science:

Engineering
Materials Science
Non-Destructive Testing

Background:

Accurate identification of corrosion extent in parallel steel wire cables is crucial for structural integrity.
Existing methods may lack precision in quantifying corrosion severity.

Purpose of the Study:

To develop and validate a novel weak magnetic imaging method for precise corrosion detection in parallel steel wire cables.
To establish quantitative relationships between magnetic signal characteristics and corrosion parameters.

Main Methods:

Collected weak magnetic signals using a 12-channel Hall array from corroded parallel wire bundles.
Analyzed the influence of corrosion severity on magnetic leakage signal distributions (Bx, Bz).
Developed a fusion imaging method combining adaptive threshold K and linear interpolation, validated with 3D finite element modeling.

Main Results:

A strong linear relationship (R² = 0.998) was found between axial corrosion length and the peak-to-trough distance of the Bz component.
A positive correlation was observed between circumferential corrosion width and the circumferential distribution range of Bz.
Adaptive threshold K segmentation effectively delineated corrosion boundaries for precise localization.

Conclusions:

The proposed weak magnetic imaging method enables accurate visualization and quantitative assessment of cable corrosion.
The technique provides reliable technical support for structural health monitoring of steel wire cables.
This method enhances the precision of non-destructive testing for corrosion in critical infrastructure.