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Positive Material Indentification

Positive Material Identification (PMI) is one of the more specialized non-destructive testing methods. With Positive Material Identification the alloy composition of materials can be determined. If a material certificate is missing or it is not clear what the composition of a material is, then PMI offers the solution. PMI is particularly used for high-quality metals like stainless steel and high alloy metals.

The XRF-principle (x-ray fluorescence) is one of the methods for PMI. Equipment used contains low radioactive sources (isotopes) or x-ray tubes. The exposed material reflects the radiation, generating energy. As every element has it’s own atomic structure, this reflection will generate a different energy level for every element. This energy is measured and detected, thus identifying the alloy elements.