Magnetic Particle Examination

An examination conducted on metals that can be magnetized, i.e., iron, steel, nickel. A solution (usually of kerosene) containing very fine particles of iron oxide. When the metal is magnetized using an external magnetic field a “flux leakage bridge” will occur at cracks and flaws that egress the surface (also they are only slightly subsurface). The fine oxide particles are attracted to the flex leakage and are detected with “black light”, ultraviolet illumination.