Positive Material Identification (PMI)

Last updated: April 10, 2019

What Does Positive Material Identification (PMI) Mean?

Positive material identification (PMI) refers to the industrial inspection analysis method of determining the composition of a given alloy to determine the constituent elements present in the alloy.


Corrosionpedia Explains Positive Material Identification (PMI)

Positive material identification (PMI) is widely performed using two main inspection approaches:

  • X-ray fluorescence (XRF)
  • Optical emission spectrometry (OES)

Either approach can determine the constituent elements in a given alloy. Having this information readily available provides the following key benefits:

  • Improved equipment upgrades, repairs and replacement-in-kind for chemically-sensitive functions such as pipelines or refineries
  • The ability to customize facility operations to meet any temperature, heat resistance or durability requirements
  • Enhance safety and efficiency in chemical plants by ensuring that the correct alloy with the required properties is selected

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