Oxidation and the Testing of Turbine Oils by ASTM International, C.A. Migdal, A. B. Wardlow, J.L. Ameye
By ASTM International, C.A. Migdal, A. B. Wardlow, J.L. Ameye
Ten peer-reviewed papers disguise the newest tendencies on agony issues, evolving lubricant /antioxidant additive applied sciences, and altering gear designs and working stipulations, with a spotlight on how those elements impression oxidation. It addresses how one can enhance present ASTM bench checks used as predicative instruments for measuring oxidative degradation, together with: D 943 Oxidation features of Inhibited Mineral Oils; D 4310 Sludge Tendency; D 2272 Oxidation balance of Steam Turbine Oils by way of Rotating strain Vessel. STP 1489 is a necessary source to these within the lubricant and turbine undefined, together with unique gear brands, finish clients, lubricant manufacturers, lubricant additive providers, attempt gear brands, and traditional try procedure builders.
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Additional resources for Oxidation and the Testing of Turbine Oils
Sample text
Maintaining and enhancing oxidative/thermal stability and especially long-term deposit control in turbine oils continues to be a fundamental area of Shell’s turbine oil R&D effort, and will be the subject of future publications. RPVOT Oil Condition Monitoring of Used Turbine Oils ASTM D 2272 is routinely used in the laboratory to give an overall estimate of the remaining oxidative stability of turbine oils, because it is relatively quick, uses a small volume of oil, and for trending oils in the field over extended periods is reliable.
After the first week, there was a high level of insolubles as measured by QSAsm. • The level of insolubles built to a very high level throughout the experiment. • The QSAsm membrane had a very dark hue. • While in the 120° C bath, this oil quickly became dark and continued to darken throughout the experiment. Discussion of Sample D The high level of insolubles in this sample throughout the experiment indicates that a fluid’s potential to produce deposits may be unrelated to the RPVOT value of the oil, as this oil had the highest RPVOT value in the group.
The majority of these byproducts are carboxylic acids but were undetected by acid number titrations. Oxidation byproducts are electrochemically polar and have a natural attraction to each other, as well as other polar compounds. The accumulation of several byproducts of lower molecular weight can form a higher molecular weight, long-chained molecule called an oligomer ͓5͔. Due to its increased mass and electronegative properties, an oligomer molecule has limited solubility in a lubricant and contributes to deposit formations.