Taking the phosphoricester fire-resistant oil treated with different measures as the research object

the aging tests were carried out to study the influence of treatment measures on hydrolytic stability of the oil. Each sample was open-cup aging tested and detected in the aging process and the changes of rotary oxygen bomb value

sludge content and p H value were analyzed. The results show that

at the same aging time

the rotary oxygen bomb value of the oil with composite additives was better than that without additives. The acid value increase of the oil after regeneration treatment and adding composite additives was the minimum. During the prophase of aging period

the detection results of sludge content were similar

but the detection result of sludge content of the oil with composite additives was significantly lower than that without additives in the late stage. After treatment and adding compound additives

the hydrolytic stability of the oil was the best. These results proved that the deterioration trend of index could be decelerated

and the stability of the treated fire-resistant oil could be enhanced by regenerating the fire-resistant oil and adding antioxidants in the aging process.