Eddy current testing is a non-destructive testing method used to detect flaws in conductive materials. It works by inducing electrical currents, known as eddy currents, in the material using a coil. When these currents encounter a flaw, such as a crack or corrosion, they change in magnitude and phase, which can be measured to assess the integrity of the material. This technique is commonly used in industries like aerospace, automotive, and manufacturing to ensure safety and quality. Eddy current testing is effective for inspecting surface and near-surface defects without damaging the component being tested.