Eddy Current Testing – ECT
Eddy current testing is a non-destructive material examination technique frequently used to detect near-surface defectsof conductive materials. Surface inspection and tube inspection are the two main uses of eddy current testing. A change in eddy current and a corresponding change in phase and amplitude are caused by variations in physical properties, such as the electrical conductivity and magnetic permeability of the test object, as well as the presence of defects. These variations can be identified by measuring the impedance changes in the coil and can be seen on an instrument's screen. ... Read More