Eddy Current - What Is It? Where Is It Used?

EDDY CURRENT TESTING (ECT) IS A COMMONLY USED AND VERSATILE ELECTROMAGNETIC NONDESTRUCTIVE TESTING (NDT) TECHNIQUE. 

ECT uses electromagnetic induction to detect and indicate surface and sub-surface flaws in conductive materials, including both ferromagnetic and non-ferromagnetic materials. It can also be used to detect coating thickness.

SPECIFIC APPLICATION AREAS INCLUDE in-service inspection of tubing at nuclear and fossil fuel power utilities, at chemical and petrochemical plants, on nuclear submarines, and in air conditioning systems. 

Here are some other areas where ECT comes in handy: 

  • Electromagnetic braking
  • Repulsive effects and levitation
  • Attractive elements
  • Identification of metals
  • Vibration and position sensing
  • Structural testing