Magnetic particle inspection is a nondestructive inspection method that provides detection of discontinuities located at or near the surface of ferromagnetic materials such as iron, nickel, cobalt, and some of their alloys. The test article is prepared by removing surface irregularities that can mask indications of unacceptable discontinuities. The item is then magnetized with direct or indirect magnetization creating lines of force also known as flux lines within the test article. Magnetic ferrous iron particles are applied to the part either dry or in a wet suspension. Imperfections in the item distort the flux lines causing them to ‘leak’ out. These areas of leakage create regions of magnetic polarity on the surface of the item, and the magnetic particles applied to the surface collect at these areas forming a visible indication of a flaw or imperfection.