Glossary

What the meanig of «Oxidative stability»?


The service life of industrial oils mainly depends on their resistance to oxidation when heated in the presence of air, water, and certain metals (eg. copper) acting as catalysts. Oxidation leads to the formation of sediment (sludge) and acidic products. The standard method for determining antioxidant properties is the Turbine Oil Stability Test (TOST), in which the oil is heated to 950 °C in the presence of water, oxygen, and iron and copper catalysts. The test results are expressed in hours during which the acid number of the oil reaches 2 mgKOH/g.