Eddy Current Testing (ECT)
Eddy current testing is a non-destructive testing (NDT) method that can be used for various inspection and detection applications. Eddy current inspections work using an electromagnetic field to measure the response from a material.
Eddy Current Testing instruments are run by magnetism just like relay speakers and electric motors. Eddy current tests are run on thin metal appliances, especially in aerospace and other manufacturing and service environments to check for structural flaws or any quality-related problem. Additionally, eddy current tests can be used for various metal thickness measurements such as identifying rust and corrosion under jets skin. Both portable and fixed system instruments are available to meet the varying test needs.
At the same time, eddy current works best on electric conductors and thus cannot be used on plastics or wood. In some cases, eddy current and ultrasonic testing are used side by side as complementary techniques. Eddy current has an advantage for quick surface testing and ultrasonic having better depth penetration.