Magnetic Particle Inspection (MPI) Services
Magnetic Testing (MT), or Magnetic Particle Inspection/Wet-Bench Method, is a non-destructive method for detecting defects in ferrous metals. A magnetic field created with AC or DC current is applied through the material, revealing flux leakage at surface or near-surface flaw.
Our magnetic particle inspection (MPI) services involve fine magnetic iron oxide particles, coated with a fluorescent dye and held in a suspension liquid, are attracted to the magnetic (flux) field in the area of the defect and to reveal it as a build-up of particles. The photograph at left shows an airplane crank-shaft being viewed with ultraviolet light (blacklight) as part of the magnetic testing process. The zoomed-view shows the presence of fatigue cracks on the plate around the crank shaft.
SJTI has the capability to test parts up to:
- 6 inches in diameter
- 90 inches in length
- two tons in weight