Tham khảo tài liệu 'materials handbook 15th ed - g. brady_ h. clauser_ j. vaccari (mcgraw-hill_ 2011) ww part 9', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 560 LUBRICATING OILS for marine engine oil call for 15 to 20 blown refined rapeseed or peanut oil. This lubricating oil has a flash point of 350 F 177 C . Steam cylinder oil has 5 to 10 fatty acid vegetable oils and the flash point is 450 F 232 C . Absorbed oil is a name of a combination oil of E. F. Houghton Co. which acts as both film and lubricant. Amlo is a trade name of a mineral oil refined wax-free used for low-temperature lubrication. The silicones are now often used to replace lubricating oils for very high and very low temperature conditions but in general the lubricating value is not high. Antioxidants used in oils to reduce oxidation and minimize sludging and acid formation are usually tin compounds such as tin dioxide tin tetraphenyl and tin ricinoleate. Tin dust alone also has an inhibitory action. Detergents are compounded in lubricating oils for internal combustion engines in order to prevent and break down carbon and sludge deposits. High percentages of animal or vegetable oils may be added to lubricating oils for use on textile machinery. They are called stainless oils for this purpose since such oils wash out of the textile more easily than mineral oils do. They also give lower coefficients of friction. The high lubricating qualities of the vegetable oils without the disadvantage of gumming can be obtained with mineral oils by the addition of an oiliness agent such as cetyl piperidine ricinoleate. The EP lubricants extreme pressure for heavy-duty gear lubrication are made with a high-quality oil compounded with a lead-sulfonated soap. For extreme high pressure and high temperatures where oils and greases oxidize molybdenum disulfide MoS2 is used alone or mixed with oils or silicones. It is a fine black powder available in particle sizes as small as 30 in m which adheres strongly to metal surfaces gives a low coefficient of friction and permits operation up to 750 F 399 C but it has an acid reaction and is corrosive to metals. MoS2 resembles
