Analysis of the Reasons of Turbine Oil Discoloration and Evaluation of Remaining Service Life

Regarding the discoloration of turbine oil in a power plant, the reasons of discoloration and the remaining service life of the oil were analyzed through acid value testing, infrared and emission spectroscopy. The results showed that no obvious oxidation products appeared in the oil, and the acid value was in the acceptable range. Whereas the remaining content of the antioxidant in the oil was only about 22%, which was already on the verge of danger to use. The results of accelerated aging test showed that the remaining service life of the operating oil was about 15.4%, and the service life was less than one year. If the oil continued to be used, it was recommended to closely follow the changes in oil quality and regularly test whether the acid value was within the acceptable range.