Magnetic Particle Inspection
Delta Flux designs and manufactures machines and systems for surface magnetoscopic Non-Destructive Testing, also called MAGNAFLUX, for all test and verification applications in industry. With the magnetic control system it is possible to detect defects or indications such as cracks or discontinuity of the piece, located in the surface or sub-surface area.
Delta Flux’s magnetic particle surface inspection machines
The range of Magnetic Particle Inspection equipment custom designed by Delta Flux for the execution of Non-Destructive surface magnetic checks covers all possible areas of application, with both fixed and mobile devices, also including accessories, tools and consumables:
Contact us for more information on our magnetic surface control systems:
How the systems for Non-Destructive surface magnetic inspections work
The magnetic testing of surface defects (procedure indicated with the initials MT) is used exclusively in the examination of components or structures made of ferromagnetic material; in the absence of this requirement, it is necessary to focus on methods such as Penetrating Liquids. This characteristic is due to the operating principle of this verification method, which is precisely based on the exploitation of magnetic fields.
In practice, the piece to be examined is first of all subjected to a magnetic field (ideally perpendicular to the direction of the presumed discontinuity in the material), and then sprayed with suitable magnetic liquids; these magnetic particles can be of the dry type or, more commonly, of the wet type, suspended in a suitable fluid. If color contrasting powders are used, the discontinuity will be visible to the naked eye, while in the case of fluorescent products these will be visible when illuminated by special ultraviolet ray Wood lamps.
The magnetization of the piece causes the magnetic particles with which it was sprinkled to orient themselves along the flux lines of the magnetic field. Since the magnetic field is deformed in any crack or discontinuity of the surface, the particles will thicken in a very visible way in correspondence with these defects, allowing their detection during the simultaneous visual inspection of the piece by the operator.
Subsequently, by means of special devices, the demagnetization of the piece can be carried out, freeing it from any residual magnetic field left over from the test. Finally, at the user’s discretion, the final cleaning of any remaining traces of the product sprinkled on the surface makes the piece ready for use.