Standard Test Method for Oxidation and Thermal Stability Characteristics of Gear Oils Using Universal Glassware

Importancia y uso:

5.1 Degradation of gear oils by oxidation or thermal breakdown, or both, can result in sludge buildup and render the oil unsuitable for further use as a lubricant.

5.2 This is the only test method that employs glassware to measure the amount of sludge produced during oxidation and thermal degradation. This test method is a modification of Test Method D2893 which measures the viscosity increase and precipitation number of the oil stressed at 95 °C, but does not measure the amount of sludge formed.

5.3 This test method can be used to evaluate the oxidation/thermal stability of gear oils. However, the test results may not correlate with the performance of gear oils in field service.

Subcomité:

D02.09.0D

Referida por:

D4871-11R22

Volúmen:

05.02

Número ICS:

75.100 (Lubricants, industrial oils and related products)

Palabras clave:

extreme pressure gear oils; gear oil; lubricants; non-extreme pressure gear oils; oxidation; sludge; universal oxidation/thermal stability test glassware; universal oxidation test; viscosity increase;