Magnetic Particle Inspection is used to detect discontinuities on and near the surface of ferromagnetic materials. The process involves magnetizing the test object. A discontinuity in the metal's surface will cause the magnetic field flowing through to be interrupted, causing a leak. Small iron shavings are applied to the test object, and they will gather in the leaks. This allows people to see where the indications are on the test object. Magnetic Particle Inspection is commonly used to test welds, tools, castings, and more for quality control, code compliance, and surface integrity purposes.
The iron particles used in MT can be wet or dry. Dry particles are easy to transport, but they are not as effective. Wet particles are suspended in a liquid. Combining the wet particles with a black light makes the indications clearly visible. This option is usually used in a laboratory setting.
Hello! My name is Melanie Boop, and I am the Communication Specialist at AER.