Abstract:Hgydrocarbon aviation lubricating oil was oxidized under the catalysis of metal sheet (Cu and Fe) at different temperatures by using high temperature oxidation accelerators.The correlation of kinematic viscosity,acid value and pour point of high temperature oxidation products was studied,and the change mechanism of them was analyzed by GC/MS.The results show that the greater the oxidative cracking of the lubricating oil,the greater the absolute value of the pearson correlation coefficient (r),and the stronger the correlation between kinematic viscosity,acid value and pour point of the oxidation product.The decay of kinematic viscosity and pour point is mainly caused by thermal cracking reaction,while the increase of acid value is mainly caused by thermal oxidation reaction.