NDT Testing with Magnetic Particle Inspection
Magnetic Particle Inspection (MPI) or Magnetic Particle Testing (MPT) is a non-destructive testing process that is used to detect cracks in parts that are made out of magnetic materials such as iron, nickel, cobalt and alloys. The magnetic material is often referenced as ferromagnetic, which means it has a high susceptibility to magnetization. Magnetic Particle Inspection is the process of using a magnetic field to determine where a crack may be on a part.
MPI is a very sensitive test method and can be a quick way to determine if a part has a crack. It is typically used on forgings, castings, fasteners, weldments, machined or stamped parts.
The Steps of Magnetic Particle Inspection:
1. Surface of the part is cleaned.
2. Magnetic Field is applied to the part.
3. Iron particles are applied and gather at cracks where the magnetic field is ‘leaking’ from.
4. Inspection and documentation of cracks on part.
The NDT Resource Center provides the above photo and more information around the basic principles of MPI.
Magnetic Particle Inspection can be done on a product that is dry or wet. Wet fluorescent magnetic particle inspection is used to detect very fine defects. In the inspection process, LED UV-A lamps are used to help view the magnetic particles gathered at the surface of the cracks on the part.
REL provides LED UV-A Inspection Lamps for FPI and MPI inspection testing. REL’S Glo-Black lights are portable or can be set up for booth lighting.
Specifications of our Mag Particle Inspection Lamps:
– Tested to ASTM E3022 Standards
– Tests to comply with Rolls-Royce RRES 90061 Requirements
– Serialized Certificate of Conformance
– Refurbishable, Service as Needed
– 1-Year Warranty
Learn more about our Glo-Black LED UV-A Inspection Lamps.