Non Destructive Testing

Penetrative Liquid” and “Magnetic Particle Inspection” are part of the integrated offering that Processi Speciali propose to the customers.

Both the processes are certified by the customers and are also Nadcap Accreditated.

Thanks to its qualified personnel and the possibility to inspect thousands of components, Processi Speciali is enhancing its experience and knowledge in NDT over a wide range of parts (plated, machined, engine parts, structural elements) and materials (Aluminum Alloy, Stainless Steel, Titanium, Magnesium, ecc).

The plant for fluorescent liquid penetrantive inspection is made up of tanks in stainless steel layed out in series and equipped with everything which is needed for the inspection (e.g. drainage system, degreasing tank, tank for hot water washing, drying, penetrative washing, UV light lamp, white light lamp, inspection station)

All the working parameters like temperature, air and water pressure, timing, light exposition are measured and monitored.

Magnetic particle inspection processes are non-destructive methods for the detection of defects in ferrous materials. They make use of an externally applied magnetic field or current through the material, and the principle that the magnetic susceptibility of a defect is markedly poorer (the magnetic resistance is greater) than that of the surrounding material.

The presence of a surface or near surface flaw (void) in the material causes distortion in the magnetic flux through it, which in turn causes leakage of the magnetic fields at the flaw. This deformation of the magnetic field is not limited to the immediate locality of the defect but extends for a considerable distance; even through the surface and into the air if the magnetism is intense enough. Thus the size of the distortion is much larger than that of the defect and is made visible at the surface of the part by means of the tiny particles that are attracted to the leakage fields.

This inspection can be applied to raw material in a steel mill (billets or slabs), in the early stages of manufacturing (forgings, castings), or most commonly to machined parts before they are put into service. It is also very commonly used for inspecting structural parts (e.g. landing gear) that have been in-service for some time to find fatigue cracks.