Enhancing Corrosion Detection and Characterization: An Innovative Approach With Pot-Cored Eddy Current Probe

This article presents an innovative approach to enhance the detection and characterization of atmospheric corrosion states using a pot-cored eddy current (EC) probe, which offers significant improvements in sensitivity and spatial resolution. The effectiveness of the proposed EC probe was validated through numerical simulations and experimental tests on various probe configurations and corroded samples at different stages of aging. The proposed EC probe efficiently detects and characterizes superficial corrosion, hidden corrosion, and corrosion beneath insulation layers. The results highlight the robust metrological performance of the probe, which effectively identifies corrosion states through single- and multifrequency approaches. The pot-core structure significantly improves signal power and noise reduction, confirming its potential for advanced nondestructive testing (NDT) applications.