复合剂与抗氧剂对煤基汽油机油氧化安定性的影响

以煤基费-托合成油为API III+润滑油基础油，利用高压差式扫描量热仪（PDSC）和热氧化模拟试验（TEOST MHT-4）测定配制煤基汽油机油样品的起始氧化温度和高温沉积物生成量，考察了复合剂和抗氧剂对煤基润滑油基础油起始氧化温度和高温沉积物的影响。结果表明：复合剂与抗氧剂的加入量不会持续增强油品的氧化安定性，过量的抗氧剂反而会因其自身氧化而增加高温沉积物生成量；全配方煤基5W-30汽油机油样品PDSC测试起始氧化温度为259.94 ℃，TEOST MHT-4试验高温沉积物为18 mg；与某品牌石油基5W-30汽油机油相比，煤基汽油机油具有更好的氧化安定性和更少的高温沉积物生成量。

EFFECT OF COMPLEX AGENT AND ANTIOXIDANT ON OXIDATION STABILITY OF COAL BASED GASOLINE ENGINE OIL

Taking coal based APIIII+ lube base oil from F-T synthesis as raw material, the initial oxidation temperature and high temperature deposit of the obtained formula oil were determined by high pressure differential scanning calorimeter (PDSC) and TEOST MHT-4 test device. The influences of complex agent and antioxidant on initial oxidation temperature and high temperature deposit of coal based base oil were studied. The results showed that the oxidation stability of base oil was not enhanced by the addition of complex agent and antioxidant. On the contrary, excessive antioxidant increased the formation of high temperature deposits due to its own oxidation. By testing the fully-formulated coal based gasoline engine oil, it could be seen that the initial oxidation temperature and the high temperature deposit were 259.94 ℃ and 18 mg, respectively. Compared with a certain brand of petroleum based 5W-30 gasoline engine oil, the coal based 5W-30 gasoline engine oil had better oxidation stability and lower high temperature deposit generation.