Relevant for all kinds of companies wishing to control the quality of materials.
Some applications:

  • Weld inspection: detection of all volumetric defects such as gas and slag inclusions, surface and alignment defects, insufficient penetration and, provided an appropriate radiation angle is chosen, of cracks and fusion deficiencies.
  • Detection of cavities and shrinkage cracks in castings.
  • Determination of the nature and location of embedded elements.
  • Detection of internal corrosion.
  • Detection of corrosion under insulation.

What you need to know

X-rays are produced in an X-ray tube, an electrical device that generates X-rays using high voltage.
Gamma rays are produced by radioactive elements (isotopes). The most commonly used isotopes are cobalt-60, iridium-192 and selenium-75. Isotopes are stored in a radiation-proof container. A radioactive source can be removed from the container using a remote control to radiograph a part.
All defects on an irradiated part are recorded on film.
Interpreting X-ray images requires a great deal of experience.
Indeed, it is difficult for a novice to interpret an X-ray film. That's why this operation is carried out by experienced operators. All the more so as the transport and use of radioactive material require extra precautions and personal qualifications. People must remain at a safe distance during film exposure.

Limitations of the method
  • Flat defects are more difficult to detect than volumetric defects.
  • The maximum thickness that can be irradiated is limited to ± 200 mm.
  • Due to the time required for development and interpretation, results are not immediately available.
  • This inspection technique requires operators such as those at Vinçotte, who have been specifically trained in radiographic techniques, film development and safety issues.
  • They must also have the necessary experience to interpret the films correctly.

Advantages

Vinçotte (member of  Kiwa Group) has the required expertise, which guarantees you a number of advantages:

  • You can see through a material.
  • You can examine different types of materials and products.
  • Surface condition has only a limited impact on sensitivity.
  • You get tangible, objective results in the form of clearly identifiable films.