Eddy Current Testing (ET) is a non-destructive testing (NDT) technique that uses electromagnetic induction to detect surface and sub-surface defects in conductive materials.
This method works by inducing a magnetic field in the material being tested, which in turn generates eddy currents. The eddy currents create a secondary magnetic field that interacts with the primary magnetic field, causing a change in the electrical impedance of the material.
By measuring the change in impedance, technicians can identify any anomalies in the material that may indicate defects, such as cracks or voids. ET is commonly used in industries such as aerospace, automotive, and power generation to ensure the safety and reliability of critical components.