What are the main components of MPI equipment?

The main components of Magnetic Particle Inspection (MPI) equipment include a magnetic yoke or coil, a power supply, magnetic particles, and a method for developers. The magnetic yoke or coil generates the magnetic field necessary to magnetize the test specimen, which is essential for detecting surface and near-surface discontinuities. The power supply provides the necessary electric current to energize the yoke or coil, enabling the effective creation of the magnetic field.

Magnetic particles are critical because they are used to reveal defects; when the magnetic field is disrupted by a flaw, the particles cluster to indicate its presence. Finally, a method for developers is necessary to enhance the visibility of the magnetic particle indications, allowing for easier and more accurate inspection of the test specimen.

The inclusion of these specific components is what makes the MPI process effective for non-destructive testing, ensuring that any potential defects are properly identified during the inspection process.