Positive Material Identification (PMI) is a non-destructive testing (NDT) technique used to determine the composition of materials, primarily in industrial settings. PMI is essential in various industries, including manufacturing, construction, oil and gas, aerospace, and petrochemical, to ensure that materials meet specified quality and safety standards.
The primary purpose of PMI is to verify that the materials used in a particular component or structure are consistent with the specified material grade and composition. It helps prevent material mix-ups, ensures compliance with safety and regulatory requirements, and maintains product quality.
PMI is typically performed using handheld or portable instruments known as PMI analyzers or X-ray fluorescence (XRF) spectrometers. These devices analyze the chemical composition of materials by measuring the characteristic X-ray emissions produced when the material is exposed to X-ray radiation.
