The coating thickness can be determined by the fluorescence
of the item induced by an X-ray source.
Our lab is equipped by a calibrated instrument for
the whole range of coatings and substrates.
In fact the coating crystalline lattice in contact
with a substrate, once irradiated by an X-ray radiation,
can re-emit an higher wave-length radiation in proportion
to its dimensions and to the type of the involved
atoms.
After a fair calibration with standard samples it
is possible to relate the emitted energy to the protective
film thickness.
The instrument presents an high resolution and an
high sensibility with very low revealing limits (about
0,20 microns for the all bands).
It does not affect nor damage the analysed item.