Eddy Current Testing (ECT) is a Non-Destructive Testing (NDT) method that uses electromagnetic induction to detect surface and near-surface defects in conductive materials. It is widely used in aerospace, automotive, and manufacturing industries.
Testing Process
- An alternating current flows through a coil, producing a changing magnetic field.
- When brought near a conductive surface, this field induces circulating currents called eddy currents.
- These currents react to discontinuities like cracks or material changes by altering the magnetic field.
- The probe detects these variations, which are displayed on the screen for analysis.
- This method is highly sensitive and does not require contact or surface cleaning in many cases.
- Level-II Qualification is generally required to perform and interpret Eddy Current inspections.