Positive Material Identification (PMI)
Definition - 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