Greases with two different thickeners, namely lithium complex (LiX) and polypropylene (PP), three base oil viscosities were investigated in fretting varying displacement amplitude applied normal load. The material combinations silver-coated copper/silver-coated copper (Ag/Cu vs Ag/Cu) steel/steel investigated. Fretting maps of four the six evaluated greases constructed as a tool to better under...

The tribological behavior of novel 7.5 wt% carbon nanotube-based lubricant greases in PAO (polyalphaolefin) oil with and without 1.0 MoS2, together several other commercial such as calcium, lithium, were studied. test results showed a marked reduction frictional coefficient achieved by the CNTs based grease samples an average benefit around 30% compared to conventional greases. steady state und...

Fats, oils and greases in waste water frequently cause serious environmental problems. A commercial preparation was tested for its ability to degrade oil grease wastewater. As substrates, two fats (lard beef fat) four (rape seed oil, sunflower palm olive oil) were chosen. The degradation of different substrates investigated by the determination lipid at pH 7, temperature 25 °C, aerobic conditio...

Chunnakam and Vadamaradchi are two major aquifer systems in Jaffna Peninsula, Sri Lanka. This study was performed to compare water quality in the domestic wells in these aquifers and to assess the efficacy of household water treatments for treating contaminated water. Replicate well water samples were collected from each aquifer and pH, dissolved oxygen (DO), conductivity, total dissolved solid...

Vegetable oil–based cutting fluids are a relatively recent development in large-scale metal machining. A metal machining factory in Wales that switched from mineral oil-based to vegetable oil-based cutting fluids has experienced the occurrence of a problematic floating sludge within the settling and holding tanks at the on-site effluent treatment plant. Physicochemical analyses have found that ...

Degradation mechanisms for lubricating grease are categorized and described. An extensive survey of the available empirical and analytical grease life estimation models including degradation monitoring standards and methods are presented. A summary of the important contributions on grease degradation is presented.

A unique membrane filtration system has been installed at several major waste oil hauling operations and manufacturing plants that handle or produce oily wastewater. The system manufactured by New Logic, of Emeryville California near San Francisco, is also being used to process used crankcase waste oil and produce filtrate that can be sold as a higher value bunker oil. The V✧SEP, (Vibratory She...