Synthetic lubricants wear protection

Table 2.7. Performance of synthetic and mineral lubricant oils. Relative evaluation of viscosity, stability (thermal, oxidation, hydrolytic, volatility), lubricity (wear protection and fatigue) and environmental impact...

Synthetic oils By using Table 2.7, Performance of synthetic and mineral lubricant oils , consider the benefits of using synthetic engine oils in several main aspects of (a) engine wear protection, (b) improved fuel and oil economy and (c) environmental protection. Which of the synthetic oils phosphate esters or alkylated aromatics (PAO) are the most common synthetic fluids used in automotive motor oils today ... 

The ideal diester for use in a partial synthetic lubricant, i.e. blend of diester, petroleum basestock and additives, should have the lowest viscosity at both high and low temperatures, and also be the least volatile. Of course, it would also need to be resistant to oxidation and corrosion and provide lubrication and wear protection when compounded into a finished lubricant. The low viscosity requirement of the synthetic portion of the partial synthetic lubricant is for economic reasons. The synthetic portion is substantially more expensive than the petroleum portion and the lower the amount required to achieve the low viscosity of the final oil, the better the final economics. As mentioned earlier, the low volatility is desirable to prevent carrying the... 

Synthetic oils are used in engines to lubricate moving parts and protect them from wear and high temperatures. Detergents are added to synthetic formulations to reduce the deposits of contaminants on vital engine components, and corrosion inhibitors are added to reduce the effect of rust from the water produced in the combustion process. 

It is a common practice in the manufacture of synthetic fibers to add a small amount of lubricating material to the fiber to assist its performance and runnability in downstream textile manufacturing processes [41,47 9]. The lubricating material is often referred to as finish. The three primary functions of the finish are lubrication of the fiber surface, static protection, and filament cohesion. The thin layer of finish is an interface between the fiber and other surfaces. The finish acts as a lubricant to reduce frictional wear and damage when the fiber passes over other contact surfaces. 

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