MT-Magnetic Particle Inspection

CSI utilizes a 600 amp Ardrox Magne-Tech wet horizontal unit suitable for circular or longitudinal magnetic particle inspections of small, medium and large ferrous (magnetic) parts for surface (and near surface) defects.  Large quantities of parts can quickly and accurately be processed using this system.




Bench Unit: able to test a large number of ferrous (magnetic) parts simultaneously and utilizes a Wet-Florescent bath and Ultra-Violet (black light) viewing


History of MT

  • Magnetism observed by the Chinese in Iodestone – 2700 BC
  • Magnetic Grindings observed by William Hoke – end of WWI
  • Magnetic Field Direction and Initial MT – A. V. DeForest – 1928
  • MT development and founding of Magnaflux Corporation by DeForest and F. B. Doane – 1929

Advantages of MT

  • Surface and Sub-Surface
  • Surface Preparation Not Critical
  • Ultra-Thin Coatings Possible
  • Size/Configuration of Part
  • Quick, Simple and Cost-Effective
  • Automated or Portable
  • Direct Indications
  • Minimal Post-Test Cleaning

Limitations of MT

  • Only Ferromagnetic Materials
  • Decrease in Sensitivity Under Surface
  • Electrical Contact (Some Techniques)
  • High Current – Possibility of Arc Strikes
  • Discontinuity Orientation
  • Not Reliable for Porosity