The ester content of the oil sample is assessed when working with synthetic oils or esters in biodegradable lubricants. Esters have unique properties such as high film strength and natural cleansing effect, but they are also sensitive to hydrolysis and oxidation.
FTIR spectroscopy is used to identify and monitor esters. The analysis provides answers as to whether the oil still contains sufficient ester proportion and whether the esters are intact.
The customer gains insight into the lubricity and stability of the oil over time — crucial in critical applications such as hydraulics in sensitive environments.