Small particles that possess magnetic properties and are used in magnetic particle inspection (MPI)A non-destructive examination technique used to detect surface or near-surface defects in ferromagnetic materials. MPI relies on the principle of magnetic fiel… to detectTo sense or obtain a measurable indication from a feature. surface or near-surface defects in ferromagnetic materials in non-destructive testing (NDT)Refers to a range of techniques and methods used to assess the integrity, quality, and properties of materials, components, or structures without causing damage…,