Magnetic Particle Inspection (MPI)

Magnetic particle inspection, commonly known as magnetic testing, is used for locating surface and near to surface discontinuities in ferromagnetic material.

Leakage is detected by use of fine ferromagnetic particles applied over the surface, this technique is called magnaflux testing and will magnetise a small part of the area or overall. If the material is complete the magnetic flux will be mainly inside the material. If there is a surface-breaking flaw, the magnetic field will be distorted, causing local magnetic flux leakage around the flaw. The magnetically charged particles form an outline of the discontinuity and indicate: –

  • Location
  • Size
  • Shape

Magnetic Particle Inspection is an excellent method of detecting discontinuities in raw materials or finished product (prior to final inspection) and more commonly, organisations undertake an MPI test for welding.

Format NDT have a fully equipped laboratory operated by a qualified team of inspectors in this discipline. Magnetic particle testing can give instant results and is easily transportable, and with our magnetic particle inspection equipment the testing can be used on and off a site.

To complement this method of magnetic particle inspection we can also provide our customers with Liquid Penetrant and Visual Inspection for surface defects on non-ferromagnetic materials, and for internal defects, we can provide Radiographic Ultrasonic and Eddy Current Inspections from our range of NDT services.

Want more information? Call us on 01744 816225 or contact us below!

Do you need more information about anything said about this service? Please call us on 01744 816225 or contact us below and we will be happy to explain in further detail.