Accession Number : ADA192971

Title :   Calibration of the Portable Wear Metal Analyzer.

Descriptive Note : Final rept. Mar 85-Dec 86,

Corporate Author : AIR FORCE WRIGHT AERONAUTICAL LABS WRIGHT-PATTERSON AFB OH

Personal Author(s) : Quinn, Michael J

PDF Url : ADA192971

Report Date : Dec 1987

Pagination or Media Count : 63

Abstract : The Portable Wear Metal Analyzer (PWMA), a graphite furnace atomic absorption (AA) spectrometer, developed under a contract for this laboratory, was evaluated using powdered metal particles suspended in oil. The PWMA is a microprocessor controlled automatic sequential multielement AA spectrometer designed to support the deployed aircraft requirement for spectrometric oil analysis. The PWMA will analyze for nine elements (Ni, Fe, Cu, Cr, Ag, Mg, Si, Ti, Al) at a rate of 4 min per sample. The graphite tube and modified sample introduction system increase the detection of particles in oil when compared to the currently used techniques of flame AA or spark atomic emission (AE) spectroscopy. The PWMA shows good-to-excellent response for particles in sizes of 0 to 5 and 5 to 10 micrometers and fair response to particles of 10 to 20 and 20 to 30 micrometers. All trends in statistical variations are easily explained by system considerations. Correction factors to the calibration curves are necessary to correlate the analytical capability of the PWMA to the performance of existing spectrometric oil analysis (SOA) instruments. Keywords: Turbine engine lubricants, Wear metal analysis, Atomic absorption spectrometer, Magnesium, Silicon, Titanium, Aluminum.

Descriptors :   *CALIBRATION, *METALS, *SPECTROMETERS, *WEAR, *LUBRICATING OILS, ABSORPTION, AIRCRAFT, ALUMINUM, ANALYZERS, ATOMIC PROPERTIES, CORRECTIONS, DEPLOYMENT, DETECTION, FURNACES, GRAPHITE, LUBRICANTS, MAGNESIUM, OILS, PARTICLES, PATTERNS, PORTABLE EQUIPMENT, POWDER METALS, REQUIREMENTS, SILICON, SPECTROMETRY, SPECTROSCOPY, STATISTICAL ANALYSIS, TITANIUM, TUBES, TURBINES, VARIATIONAL METHODS

Subject Categories : Lubricants and Hydraulic Fluids
      Properties of Metals and Alloys
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE