Magnetoscopic Testing is a Non-Destructive Test that is based on the deviation that the magnetic field lines induced in a ferromagnetic material undergo in the presence of a discontinuity.
The fields of application of magnetoscopic inspection are numerous, with the only condition being that the elements being inspected consist of ferromagnetic metals.
Magnetoscopy is particularly useful for inspecting welds, including those that cannot be radiographed, for examining hot or cold plastic deformations (bending, bowing, die-casting, etc.) of items such as pipes and sheets, for checking that machining has not caused micro-cracking, especially in the most stressed areas of the forming process, and in searching for any defects due to heat treatment.
There are a variety of equipment available, ranging from lightweight and portable to stationary and automated, and can be used safely even inside large metal artifacts such as boilers, tanks, and viaducts.
Magnetoscopic inspection can be applied in a variety of industries such as steel, electromechanical, aerospace, civil, power, off-shore, transportation, petrochemical, nuclear, art, and virtually all other industries where the integrity status of nonmagnetic metal artifacts needs to be verified.
Dispersed magnetic flux due to surface or sub-surface discontinuities such as cracks , cavities and inclusions.
Sensitive to both surface and sub-surface defects.
Ferromagnetic materials – surface cleaning – demagnetization.