Magnetic Particle Inspection

Magnetic particle inspection (MPI) is a relatively simple process for finding surface cracks and near-surface discontinuities in parts made from ferromagnetic materials such as iron, steel and nickel.

The first step in the process involves inducing a magnetic field in the part undergoing inspection. Once the field is induced, a powder containing iron particles is sprinkled on the part. The iron particles will congregate at the site of any surface or near-surface discontinuities. After inspection the part is demagnetized and handled accordingly with the inspection results.

The speed and relative simplicity of this technology make it ideal for high volume applications as well as on-site inspection of welded or brazed joints.

Magnetic Particle Inspection at Hammitt & Associates

Magnetic particle inspection at Hammitt & Associates encompassed both laboratory and field services. Our state-of-the-art equipment includes a high volume Decacoil system that uses a series of powerful coils to induce multi-directional magnetic fields in the parts undergoing inspection. Inspection rates for this equipment typically ranges up to 10,000 parts per shift.

We also use a Magnaflux MD1030 MPI system with an attached conveyor unit for increased inspection rates, generally 3,000 – 4,000 parts per shift.

Field inspection assignments are conducted by highly skilled and qualified technicians using portable MPI equipment. Our service area includes the entire Midwest.