The Magnetic Particle Inspection is another Non-Destructive testing method used by EWF Group for locating surface and subsurface discontinuities in ferromagnetic material such as Iron, Nickel, Cobalt & some of their alloys. Depending on its operation on the face when the material or part under test is magnetized, discontinuities that lie in a direction generally transverse to the direction of the magnetic field. This causes a leakage field, and therefore, the presence of the discontinuity is detected by using finely divided ferromagnetic particles applied over the surface, some of these particles being gathered and held by the leakage field. This magnetically held collection of particles forms an outline of the discontinuity and indicates its location, size, shape, and extent.