Course Summary

Magnetic Particle Testing


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MPI Principle

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MPI Result


Magnetic particle testing or MPT is a nondestructive testing method for locating surface and near surface discontinuities in ferromagnetic materials. It depends for its operation on the fact that when the material or part under test is magnetized, discontinuities that lie in a cause leakage field to the direction of the magnetic field will cause a leakage field to be formed at and above the surface of the part. The presence of this leakage field, and therefore the presence of the discontinuity, is detected by the use of finely divided ferromagnetic particle applied over the surface, some of the particle being gathered and held by the leakage field. This magnetically held collection of particle forms an outline of the discontinuity and generally indicates its location, size, shape and extent. Magnetic particles are applied over a surface as dry particles, or as wet particle in a liquid.

The principal industrial uses of magnetic article testing are final inspection, receiving inspection, in process inspection and quality control, maintenance and overhaul in the transportation industries, plant and machinery maintenance and inspection of large components.


  • Certification/Awarding Body:
  • • CSWIP

    • Course Content:
    • • Principles of magnetism; magnetic fields; induction; permeability and reluctance; magnetisation; lines of force, methods of testing; interpretation of indications; demagnetisation; practical exercises; methods of assessing sensitivity; instruction writing.
    • • During the Level 2 instruction writing and application, attendees requiring only Level 1 training will carry out practical applications to written instructions.
    • • The course ends with the certification examination.
    • • Training in accordance with the requirements of ISO 9712.

    • Course Objectives:
    • • To explain the basic principles of magnetic particle inspection methods
    • • To carry out magnetic particle inspection
    • • To write clear and concise inspection instructions and test report