For industrial samples, quality control or failure analysis is vital to future product improvements. This polypropylene coated metal sample failed quality control tests due to poor coating adhesions. A section of the coating was removed and the entire sample was inserted in the MiniFlex for testing.
The answer was rust! A thick layer of corrosion was forming between the metal substrate and the polypropylene.
Non-destructive failure analysis is one of the benefits of X-ray diffraction.