高环烷烃铝材轧制基础油氧化安定性能的研究

选用了一种低硫、低芳烃铝材轧制基础油，在GCMS-QP2010型气相色谱质谱联用仪上分析了它的化学组成，并采用紫外分光光度法测定其芳烃含量，在SH0206变压器油氧化安定仪上测定油品的氧化安定性，运用红外光谱分析法测定了油品氧化前后官能团的变化。试验结果表明：该基础油为高环烷烃基础油，其氧化安定性较差，在氧化过程中产生了酸、酯；在基础油中添加酚类抗氧剂和金属减活剂能明显提高油品的氧化安定性，且两种抗氧剂有着良好的协同作用。

STUDY ON THE OXIDATION STABILITY OF HIGH CYCLOALKANE BASE OIL FOR ROLLING ALUMINUM MATERIAL

Two kinds of oils, both low in sulfur and aromatics contents but various in cycloalkane contents, were selected to be used as base oils for rolling aluminum material. Their chemical compositions were analyzed by gas chromatograph-mass spectrometer, and the aromatic hydrocarbons content was tested according to the ultraviolet prismatic luminosity method. The oxidation stability of these samples was tested by an oxidation stability tester (for SH0206 transformer oil). The differences of function groups between base oil prior and post to oxidation test were determined by FT-IR. Results indicated that the oxidation stability of base oil with high cycloalkane content was inferior: acid and ester were formed during the oxidizing process, yet adding phenol antioxidant and metal deactivator into said base oil could significantly improved its oxidation stability, and positive synergistic effect between these two additives was observed.