What is Magnetic Particle Testing (MPT)?

Magnetic particle testing is a non-destructive testing (NDT) method used to detect surface and near-surface cracks in ferromagnetic materials (such as steel). The aim is to reveal defects that are invisible to the naked eye.

How is it done? (Briefly)

Magnetization

The part to be tested is magnetized with an electric current or a magnet.

Magnetic particle application

Iron powder or liquid magnetic particles are applied to the part.

Defect detection

The magnetic field is disrupted in the cracked area.

Particles accumulate in this area, and the defect becomes visible.

Evaluation

The resulting traces are evaluated.

The part is demagnetized after the test.

Where is it used?

Weld seams

Shafts, gears, spindles

Pressure vessels and steel structures

Advantages

Fast and reliable

Detects subsurface cracks

Does not damage the material

Who should do it?

Certified NDT personnel