Magnetic particle inspection (MPI) is a nondestructive testing (NDT) method that does not harm the parts being inspected. MPI is a cost-effective and reliable testing method commonly used to identify surface and slightly subsurface discontinuities in ferromagnetic materials. The process is used on machined parts, iron and steel castings, forgings, welds, parts that undergo heat treatment, and several other applications that will be placed into service or already are in service and require maintenance. MPI is often used to locate defects in mechanical parts in the aerospace, automotive, oil & gas, welding and power generation industries.
