Magnetic particle testing (MT) is used to locate surface and slight subsurface discontinuities or defects in ferromagnetic materials. Such flaws present in a magnetized part will cause a  magnetic field (i.e. flux) to leave the part. If magnetic particles are applied to this surface, they will be held in place by the flux leakage to give a visual indication. NDTG provides the following services with this technique:MT1

Yokes

  • Direct current (AC) yokes
  • Portable Alternated Current (AC) yokes

Magnetic Particles

  • Dry powder
  • Wet system particles (Fluorescent, Color Contrast)