Quantitative evaluation of corrosion in conductors under stress via GPEC

Author:

Ren Shuting1,Li Yong1,Liu Zhengshuai1,Zainal Abidin Ilham Mukriz2,Chen Zhenmao1

Affiliation:

1. State Key Laboratory for Strength and Vibration of Mechanical Structures, Shaanxi Engineering Research Centre of NDT and Structural Integrity Evaluation, School of Aerospace Engineering, Xi’an Jiaotong University, , China

2. , , , Malaysia

Abstract

Macroscopic defects such as corrosion in nonmagnetic Conductors Under Stress (CUS) are more universal than those within the zero-stress environment, and result in complicated characteristics regarding the electrical properties of the conductors. In this paper, Gradient-field Pulsed Eddy Current technique (GPEC) is intensively investigated for imaging and evaluation of corrosion in CUS. The influence of stress on electrical properties of nonmagnetic CUS with corrosion is analysed via multi-physics simulations and experiments. The correlations between characteristics of corrosion in CUS and the GPEC signal and its features are established and scrutinised. An image processing method reproducing defect images for quantitative assessment of detected corrosion in CUS is proposed.

Publisher

IOS Press

Subject

Electrical and Electronic Engineering,Mechanical Engineering,Mechanics of Materials,Condensed Matter Physics,Electronic, Optical and Magnetic Materials

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