Eddy Current Inspection

Eddy Current Testing (ECT) is the best way of inspecting tubing made of non-ferrous materials such as austenitic stainless steel, brass, Inconel™, titanium, and copper, for example. Eddy Current Testing (ECT) is based on the use of a probe made of a single coil in which, an alternating current is sent. This generates a circular magnetic field around the coil which then induces eddy currents of the opposite direction into the pipe wall. Discontinuities or loss of wall thickness alter the eddy current flow which translates into a change of impedance in the coil. This can be visualized by the operator giving the indication of a potential flaw.