TRIBOLOGICAL PROPERTIES AND MECHANISM OF LUBRICATING OIL CONTAINING NANO-COPPER IN MAGNETIC FIELD

Petroleum Processing and Petrochemicals ›› 2019, Vol. 50 ›› Issue (11): 73-78.

TRIBOLOGICAL PROPERTIES AND MECHANISM OF LUBRICATING OIL CONTAINING NANO-COPPER IN MAGNETIC FIELD

Received:2019-03-26 Revised:2019-07-01 Online:2019-11-12 Published:2019-11-29
Contact: fang jianhua E-mail:fangjianhua71225@sina.com
Supported by:

Abstract

Abstract: The nano-copper lubricating oil additive modified by oleic acid was synthesized. The tribological properties of nano-Cu lubricating oil in different magnetic fields were investigated by modified four-ball machine. The results showed that the wear spot diameter and friction coefficient of the steel ball in the lubricating oil containing nano-Cu were smaller than those in the environment without magnetic field. Scanning electron microscopy (SEM) and X ray photoelectron spectroscopy (XPS) were used to analyze the wear spots, and the tribological mechanism of nano-Cu in magnetic field was discussed. It is concluded that on the one hand, induced current caused by external magnetic field promotes the softening of Cu; on the other hand, the applied magnetic field may promote the participation of Cu in the tribochemical reaction to form CuO.

Key words: nano-copper, magnetic filed, lubrication mechanism, surface analysis

CLC Number:

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