What condition must be met for a component to be appropriate for MPI?

For a component to be suitable for Magnetic Particle Inspection (MPI), it is essential that it is made of ferromagnetic materials. This is fundamental because MPI relies on the magnetic properties of these materials to detect surface and near-surface discontinuities. When a ferromagnetic material is magnetized, any flaws present will disrupt the magnetic field, allowing magnetic particles to gather at the site of the discontinuity and reveal its presence.

Ferromagnetic materials, such as steel and iron, are characterized by their ability to become magnetized and retain their magnetism. Non-ferromagnetic materials, such as aluminum or brass, do not exhibit these properties and therefore cannot be effectively inspected using the MPI method.

The other conditions mentioned do not inherently make a component suitable for MPI. While being unpainted may be beneficial to ensure the particles adhere properly and that the integrity of the inspection is maintained, it is not a strict requirement. Similarly, a thicker profile can be easier to inspect, but it is not necessary for MPI to be applicable. The notion that the component must be static and unmoved is also not a requirement; in many cases, components can be inspected while receiving minimal handling. Overall, the critical condition for effective MPI is the material's ferrom