Magnetic Particle Inspection
Magnetic Particle Inspection (MPI) is a
non-destructive testing (NDT) process for
detecting surface and slightly subsurface
discontinuities in ferroelectric materials such as
iron, nickel, cobalt, and some of their alloys.
The piece can be magnetized by direct or indirect
Direct magnetization occurs when the electric current is passed through the test
object and a magnetic field is formed in the material. Indirect magnetization occurs
when no electric current is passed through the test object, but a magnetic field is
applied from an outside source.
Galvanized welds can be reliably tested with geometrically optimized attachment
poles, which assures a reliable magnetic particle testing.
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