Focus on self‐repairing performance and mechanism of Cu‐DDP additive in base lubricating oil
Abstract
Purpose
The purpose of this paper is to prove the self‐repairing Cu film of Cu‐DDP additive in base lubricating oil.
Design/methodology/approach
Cu nanoparticles coated with dialkydithiophosphate (Coded as Cu‐DDP) were synthesized in situ by redox method. The size and structure of Cu‐DDP were characterized using transmission electronic microscopy (TEM) and electronic diffraction (ED) analysis. The self‐repairing performance of Cu‐DDP as additive in base lubricating oil was evaluated by MRH‐3 stock‐on‐ring testing machine. Scanning electronic microscopy (SEM), UMT‐2 tribometer, X‐ray photoelectron spectroscopy (XPS), and energy‐dispersive spectrum (EDS) were used to study the self‐repairing Cu film on the stock.
Findings
The test results showed that the modified Cu‐DDP additive in base lubricating oil exhibited excellent anti‐wear and friction‐reducing properties, as well as good self‐repairing performance.
Research limitations/implications
The thickness of the self‐repairing Cu film was unknown, and the relationship between thickness of the Cu film and load, time, rotation velocity was still necessary to investigate.
Practical implications
The Cu‐DDP additive was involved P and S elements, therefore, it is still promising to seek environment friendly additive without P and S elements.
Originality/value
For the first time, MRH‐3 stock‐on‐ring testing machine, Scanning electronic microscopy (SEM), UMT‐2 tribometer, X‐ray photoelectron spectroscopy (XPS), and energy‐dispersive spectrum (EDS) were widely used to study the self‐repairing Cu film on the stock.
Keywords
Citation
Yidong, Z. (2012), "Focus on self‐repairing performance and mechanism of Cu‐DDP additive in base lubricating oil", Industrial Lubrication and Tribology, Vol. 64 No. 1, pp. 11-15. https://doi.org/10.1108/00368791211196844
Publisher
:Emerald Group Publishing Limited
Copyright © 2012, Emerald Group Publishing Limited