What is one of the key advantages of using MPI?

One of the key advantages of using Magnetic Particle Inspection (MPI) is its ability to detect surface and near-surface discontinuities. This method leverages magnetic fields and ferromagnetic particles to identify flaws that may not be visible to the naked eye. When a magnetic field is applied to a component, any discontinuities such as cracks, voids, or laps in the material will disrupt the flow of the magnetic field, allowing for the particles to accumulate at these flaws. This distinctive buildup highlights the presence and location of defects effectively.

Liquid penetrant testing and visual inspection may fail to reveal such defects, especially those that are not exposed on the surface. On the other hand, MPI is specifically beneficial because it can highlight these critical flaws before they become a significant issue, making it a valuable tool in ensuring the integrity and reliability of metal components in various industries.