Standard Test Method for Determination of Wear Metals and Contamination Elements in Used Industrial Oils by Sweeping Flat Electrode Atomic Emission Spectrometry

Importancia y uso:

5.1 Used Industrial Oil—The detection of large particles are important inputs for used industrial lubricant condition mornitoring. For wear metals, these particles, in size, are represented by those between 20 μm and 50 μm in engine oil, 80 μm or greater in gear-box oil. In desert or windy areas, large sand and dust particles can enter in-service lubricant. The concentrations contributed from large particles can be more sensitive to serious or catastrophic failure of industrial equipment than those from 10 μm or less. In spectroscopic analysis, excluding large particles significantly under-reports the concentrations of wear and contamination elements. The corresponding results may not represent the actual state of in-service lubricant. Because this test method posts less limitation on the size of wear metal particles while still reporting normal fine wear particles, it provides a means to assess wear and contamination elements in a comprehensive range of the size of particulates and raises the fidelity of spectroscopic analysis of in-service lubricant.

5.2 Non-suspendable Particles in Used Industrial Oil—The increase of non-suspendable particles suggests excessive wear or poor sealing of machinery, or both. Large amounts of such particulate in industrial oil bulk itself are harmful to moving parts of machinery. This test method provides another means to identify the presence or absence of the non-suspendable particles for machinery condition monitoring.

Subcomité:

D02.03

Volúmen:

05.05

Número ICS:

75.100 (Lubricants, industrial oils and related products)

Palabras clave:

additive elements; arc-spark emission spectrometry; concentration of non-suspendable particles; contaminants; emission spectrometry; graphite flat electrode; in-service lubricants testing; industrial oil; less populated particles; RDE; rod electrode; SFE; standardization; sweeping flat electrode; sweeping flat electrode spectrometer; wear metals; XY sweeping table;