METHOD FOR DETERMINING THERMAL-OXIDATIVE STABILITY OF LUBRICATING MATERIALS Russian patent published in 2008 - IPC G01N25/00 

FIELD: analysis of materials.

SUBSTANCE: in accordance to the invention, a specimen of lubricating material is tested during constant time starting at maximal temperature which exceeds the temperature at which oxidation begins, with its following reduction down to value at which light stream absorption coefficient is stabilized, then lubricating material testing temperature is increased in steps up to maximal temperature and then reduced repeatedly until stabilization of light stream absorption coefficient. Set cycle of temperature alternation is repeated until accepted value of light stream absorption coefficient is reached. Thermal-oxidative stability is determined on basis of number of cycles of oxidation speed increment oscillations and limitary serviceability temperature.

EFFECT: possible production of additional information when determining thermo-oxidizing stability of lubricating materials in broad range of oxidation.

9 dwg