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- Eddy current coil generates primary magnetic field
- Primary magnetic field induces eddy currents in the material
- Eddy currents generate secondary magnetic field in the opposite direction
- Coil impedance changes, as a result
- Impedance change is measured, analyzed and correlated with defect dimensions
Advantages of ECT
- ECT can be used to inspect Non-Ferrous Tubes ( eg. SA249-TP304L, SA249-TP316, Brass, Titanium, Inconel, Monel, Cupro-Nikel, etc. )
- Eddy Current testing is suitable for detection, sizing and quantified, affordable and quick method of inspection.
- Can detect ID / OD pitting, fretting, stress cracks, localized corrosion
- Fast method inspection. Able to inspect 700 tubes with 6m length per day, subjected to tubes conditions.
- It’s possible to detect and quantify defects under support plates
