Abstract: A series of lubricating oils containing different mass fractions of anticorrosive and antiwear additives are confected. The corrosion simulating experiments of bearing in those lubricating samples are performed using an axletree balls corrosion simulating assessment equipment，and the laboratory findings are quantitatively processed according to the corrosion grade criterion. The result shows that both the anticorrosive and antiwear additives can affect the anticorrosive property of lubricating oil. The ultra-voilet absorbency of the lubricating oil is measured before and after the addition of antiwear additive, and the mass fraction change of anticorrosive additive in interfacial film is calculated. The calculated result is compared with the anticorrosive property change between the lubricating oils before and after the addition of antiwear additive. It is found that the change in the absorbability of anticorrosive additive in the interfacial film is consistent with the anticorrosive property change of lubricating oil, which indicates that the sorption between antiwear and anticorrosive additive on the surface of axletree is interactive, and the anticorrosion effect of lubricating oil is determined by the quantity of anticorrosion additive adsorbed on the interface of axletree balls.

Key words: petro-chemistry engineering, antiwear additive, anticorrosion additive, anticorrosion ability, lubricating oil, absorbency