NDT Method
How Eddy Current Works
An explanation of how eddy current testing uses electromagnetic induction to detect surface cracks.
Overview
Eddy current testing works by passing alternating current through a coil, which creates a changing magnetic field. When the coil is placed near a conductive material, it induces circulating eddy currents in the surface.
A defect such as a crack disrupts the flow of these eddy currents, changing the coil's impedance. The instrument detects this change and alerts the inspector.
The Process
- Energise the probe coil
- Induce eddy currents in the material
- Detect impedance changes from defects
- Interpret signals to locate cracks
Frequently Asked Questions
An explanation of how eddy current testing uses electromagnetic induction to detect surface cracks. Contact our team on 0416 689 689 to discuss the equipment, location and inspection scope.
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