Study on Serpentine Particles as Lubricating Oil Additives

The reason why equipment failure is that wear bring on friction and lubrication is the mostly effective measure that decrease friction and wear. Rational design of lubricating oil can meet the needs of machine and parts about anti-wear and friction reduction. The key of the lubrication effect depends on lubricating additives to a great extent. How to on-line self-repair the early wear and prolong lifetime of machines and equipments has more and more attracted much attention recently. As the main kind of self-repair material, the research of serpentine particle is becoming the focus of tribologic because of its particular microstructure and properties.In this thesis, serpentine particles have been prepared by adopting wet method on planetary ball mill. Lipophilic degree tests showed that:as the modification agent, the optimum dosage of oleic acid is when the volume ratio of oleic acid and serpentine particles is 2, and the optimum time of milling (modification) is 24h. Added serpentine particles into 4012 maritime lubricating oil sample, by using reciprocating friction and wear tester, measuring the friction coefficient and the wear loss of test samples, studied its anti-wear and friction reduction properties with different density in different load conditions. The results showed that:4012 maritime lubricating oil with serpentine particles has obvious anti-wear and friction effect. After discussing the relationship of friction coefficient and density, wear loss and density, so as to find out that the optimum dosage range of serpentine particles is 0.9%～1.0%. According to the results of metallurgical microscope observation and electron microprobe analysis, the conclusion can be drawn:during the process of friction and wear, serpentine particles brought on physical or chemical reactions with the surface of test samples, create a layer of protective film, thus this kind of lubricating oil has filling function to the furrow of friction pair surface, so as to decrease the surface roughness, decrease the degree of friction and wear.