the sample is filtered, all traces of that solvent must be removed before the sample is eluted from the disc. Oil vs Grease. Pouring aliquots of sample out for analysis will not give a representative sub-sampling in most cases. The ancient Romans and Egyptians are both believed to have been among the first to create real grease by combining olive oil with lime (calcium carbonate) to make calcium-based grease. Depending on the specific origin of The history of lubricating grease dates back to Egyptian times or even beyond. Grease, thick, oily lubricant consisting of inedible lard, the rendered fat of waste animal parts, or a petroleum-derived or synthetic oil containing a thickening agent. to remove grease, oil, or the like, from, especially by treating with a chemical. Anything left over after silica gel treatment is a non-polar material. Find more ways to say grease, along with related words, antonyms and example phrases at Thesaurus.com, the world's most trusted free thesaurus. It assigns a single multi-part code to each grease based on its operational properties (including temperature range, effects of water, load, etc.) This can cause significant delays in the extraction process. materials’) and fatty compounds of animal or vegetable origin. A few greases are rheotropic, meaning they become more viscous when worked. to separate. 1664B simply says to adjust the temperature as appropriate. Silicone-based greases are cheaper than fluoroether-based greases. [2] It is often applied using a grease gun, which applies the grease to the part being lubricated under pressure, forcing the solid grease into the spaces in the part. Because the HEM constituents If using solid phase discs that require activation (typically with methanol) before ... Any discussion of lubrication inevitably leads to a comparison between oil and grease lubricants, and a discussion of the pros and cons of each type. Method Summary – Hexane is used to extract material (ideally just oil and grease) from an acidified aliquot of the sample stream. Another commonly used poly-α olefin base oil as well The United States Department of Agriculture (USDA) has three food-grade designations: H1, H2 and H3. This sudden drop in shear force means that grease is considered a plastic fluid, and the reduction of shear f… The most important one is the solvent of choice. oil phrase. oil definition: 1. petroleum (= the black oil obtained from under the earth's surface from which petrol comes): 2…. Carboxymethyl cellulose, or CMC, is one popular material used to create a water-based analog of greases. In some cases, the lubrication and high viscosity of a grease are desired in situations where non-toxic, non-oil based materials are required. Oil and grease in the form of motor oil and fuel are commonly found in stormwater runoff. [6], Some greases are labeled "EP", which indicates "extreme pressure". The NLGI grade is a measure of a greases consistency. The molecules that make up the thickener will align themselves in such a way that they create a sort of structure with spaces in between, and the oil … Fats, Oil and Grease. The nature of the soaps influences the temperature resistance (relating to the viscosity), water resistance, and chemical stability of the resulting grease. Definitions by the largest Idiom Dictionary. Learn more. Standard Methods recommends 85 °C while 1664A says 70 ± 2 °C. The grease helps to prevent joints from "freezing", as well as ensuring high vacuum systems are properly sealed. Learn more. Lithium-based grease has a dropping point at 190 to 220 °C (350 to 400 °F). CMC serves to both thicken the solution and add a lubricating effect, and often silicone-based lubricants are added for additional lubrication. Oil and grease can deteriorate wires, belts, and hoses. Silicone greases are generally thickened with silica. International Organization for Standardization, Society of Tribologists and Lubrication Engineers, 10.2993/0278-0771(2006)26[299:BSAAAG]2.0.CO;2, https://en.wikipedia.org/w/index.php?title=Grease_(lubricant)&oldid=998648631, Articles with unsourced statements from November 2020, Articles with unsourced statements from June 2012, Wikipedia articles incorporating text from Grocer's Encyclopedia, Creative Commons Attribution-ShareAlike License, LA and LB: chassis lubricants (suitability up to mild and severe duty respectively), GA, GB and GC: wheel-bearings (suitability up to mild, moderate and severe duty respectively), This page was last edited on 6 January 2021, at 11:01. Calcium sulphonates and polyureas are increasingly common grease thickeners not based on metallic soaps.[4][5]. EP2 Grease. Greases are usually shear-thinning or pseudo-plastic fluids, which means that the viscosity of the fluid is reduced under shear. Oil separation, also known as oil puddling or oil bleed, is a common phenomenon that occurs naturally when storing grease. Use of ozone depleting substances in laboratories. The method does allow Another word for grease. 2 : wool as it comes from the sheep retaining the natural oils or fats. When performing an analysis for HEM you must always use whole volume samples. Care must be taken to carefully vent during the agitation to avoid potentially It is a general purpose lithium-soap thickened grease for extreme pressures. n. 1. the melted or rendered fat of animals, esp. Until the discovery of crude oil in the 19th century, progress in greases was not well-documented. “Oil and grease” is defined as any material recovered as a substance soluble in the solvent. some dyes, sulfur, and substituted hydrocarbons but does not include some heavier petroleum residuals. Jointly developed by ASTM International, the National Lubricating Grease Institute (NLGI) and SAE International, standard ASTM D4950 “standard classification and specification for automotive service greases” was first published in 1989 by ASTM International. What You Should Know – As mentioned previously, a better name for this test is HEM. They also impact grease consistency, which is measured in NLGI (National Lubricating Grease Institute) Grades. Food-grade greases are those greases that come in contact with food. (Entry 1 of 2) 1 a : rendered animal fat. Almost all Grease is an oil to which a thickening base has been added so that the end product is semi-solid. Whether you choose liquid-liquid, Soxhlet, or some sort of SPE method you must use n-hexane and If these compounds are not removed before discharge of treated wastewater, oil and grease can interfere with biological life in surface waters and create unsightly films. Once again, these two To put it simply, grease is oil mixed with a thickener and other additives. It is quite easy to understand why many people tend to interchange oil and grease. It may be used inside the household. in the grease. However the maximum usable temperature for lithium-based grease is 120 °C. Copyright © 2021 Environmental Express - All Rights Reserved. It includes other material extracted by the solvent from an acidified sample (such as sulfur compounds, certain organic dyes, and chlorophyll) and not volatilized during the test. Lithium grease is a thickener used to thicken oil content. Grease (lubricant), a type of industrial lubricant Grease, any petroleum product or fat (including cooking fat) that is a soft solid at room temperature . 3. Once it has thickened it is a “grease” and no longer an “oil." grease fire definition in English dictionary, grease fire meaning, synonyms, see also 'grease',grease cup',grease gun',grease monkey'. H3 lubricants are food-grade lubricants, typically edible oils, used to prevent rust on hooks, trolleys and similar equipment. Oil bleed is a term used to explain the separation of oil or seepage of oil during normal grease operating conditions. For reasons Understanding lube oil and its job functions: There are several jobs that the lube oil is designed to perform. EP greases have increased resistance to film breakdown, form sacrificial coatings on the metal surface to protect if the film does break down, or include solid lubricants such as graphite or molybdenum disulfide to provide protection even without any grease remaining. H1 lubricants are food-grade lubricants used in food-processing environments where there is the possibility of incidental food contact. Method 1664 specifically deals with a liquid-liquid extraction procedure. Cork grease is a lubricant used to lubricate cork, for example in musical wind instruments. Powdered solids may also be used as thickeners, especially as clays. Fats and oils are contributed to domestic wastewater in butter, lard, recovery as you have less of a chance of volatilizing some of the lighter weight organics. After all, they are both lubricants that are used to minimize friction in most machineries, tools and equipment. The DIN standard V 0010517, 2000-08 has also been adopted by the European Lubricating Grease Institute (ELGI) and National Lubricating Grease Institute (NLGI) as their guideline. The HEM is than extracted by rinsing with solvent to carry the HEM into a grease definition: 1. animal or vegetable fat that is soft after melting, or more generally, any thick oil-like…. COBUILD Key Words for Automotive Engineering . For example, petroleum jellies such as Vaseline are not generally classified as greases. Approved Methods – There are only two, EPA 1664 and SM5520 B/F. Oil and grease can deteriorate wires, belts, and hoses. mix of solvents in the procedure. A common feature of greases is that they possess a high initial viscosity, which upon the application of shear, drops to give the effect of an oil-lubricated bearing of approximately the same viscosity as the base oil used in the grease. Fluoroether-based greases are inert to many substances including solvents, acids, bases, and oxidizers. They also act as sealants to prevent ingress of water and incompressible materials. Brown grease, waste vegetable oil, animal fat, grease, etc. NSF 116-2000 Draft Standard in Detail [citation needed], Grease from the early Egyptian or Roman eras is thought to have been prepared by combining lime with olive oil. Oil - Idioms by The Free Dictionary ... the squeaky wheel gets the grease/oil; the squeaky wheel gets the oil; tongue oil; Want to thank TFD for its existence? Introduction – Oil and Grease (O&G) is the most method defined of all method defined parameters. unpalatable. oil. Because of thiis, it had to evolve from plain grease to more specialized greases for some of today’s applications. grease phrase. Name stands for ALL PURPOSE grease. [3], Solid additives such as copper or ceramic powder are added to some greases for static high pressure and/or high temperature applications, or where corrosion could prevent dis-assembly of components later in their service life. This quality makes clean-up with pentane or hexanes trivial, but also easily leads to contamination of reaction mixtures. Oil bleed is easily identified by the presence of oily sections of greased components and/or the formation of small pools of oil around componentry. components of HEM will be found either on the surface of the sample or adhering to the walls of the container. Grease-lubricated bearings have greater frictional characteristics because of their high viscosity. Because this is a method defined parameter there are certain requirements to which one What is it ? Lithium-based greases are the most commonly used; sodium and lithium-based greases have higher melting point (dropping point) than calcium-based greases but are not resistant to the action of water. This involves transferring your sample Any of a large class of liquid or easily melted substances that are typically very slippery and greasy. Silicone-based greases are not easily removed with solvent, but they are removed efficiently by soaking in a base bath. Fomblin by Solvay Solexis and Krytox by duPont are prominent examples. Oil and grease can get into waterways when stormwater runs off any site with heavy vehicular activity such as a transportation hub, vehicle repair facility or automotive recycling facility. into large separatory funnels and adding 30 mL of hexane. These compounds are working as a release agent. The hexane is evaporated and the entire amount of residue left behind is defined as oil and grease. Apiezon, silicone-based, and fluoroether-based greases are all used commonly in laboratories for lubricating stopcocks and ground glass joints. There are two main components of oil and grease, petroleum based hydrocarbons (now referred to as ‘nonpolar Get the top F.O.G. Grease F.O.G. Still lower evaporation TemaNord 2003:516. temperatures would allow for losing less material to volatilization at the expense of longer evaporating times. This includes Lithium grease is a lubricant. Most types of oil and grease are insoluble in water. Lubrication of moving parts, cooling, cleaning, corrosion control, and etc. abbreviation related to Grease. What does oil expression mean? Soaps are the most common emulsifying agent used, and the selection of the type of soap is determined by the application. The oil companies work diligently to produce oils to meet engine manufacture's ever increasing requirements, creating better and better oils each year. There are certain Standard Methods that are not allowed because they use a than water, the entire sample volume must be drained from the funnel, usually back into the sample container, wool, as shorn, before being cleansed of the oily matter. What does it stand for? Oils are flammable, do not mix with water, and include animal and vegetable fats as well as substances of mineral or synthetic origin. They are relatively inert and generally do not affect reactions, though reaction mixtures often get contaminated (detected through NMR near δ 0[13]). They can either be determined as a whole categories are purely method defined. What does grease expression mean? H2 lubricants are industrial lubricants used on equipment and machine parts in locations with no possibility of contact. However, they dissolve in many organic solvents. a substance, as oil or grease, for lessening friction, especially in the working parts of a mechanism. Greases are applied to mechanisms that can be lubricated only infrequently and where a lubricating oil would not stay in position. Oils. A true grease consists of an oil and/or other fluid lubricant that is mixed with a thickener, typically a soap, to form a solid or semisolid. In the middle of the 19th century, soaps were intentionally added as thickeners to oils. Common uses. ing. Grease is an oil to which a thickening base has been added so that the end product is semi-solid. One final recovery of your standards. It is usually applied using small lip-balm/lip-stick like applicators. In countries where infrared is the standard method, there will be an excellent correlation. (“FOG”) shall mean a material either liquid or solid, composed primarily of fat, oil, including Floatable Oil, and/or grease from animal or vegetable sources.The terms "fats, oils, and grease, “oil and grease”, or “oil and grease substances” shall all be included within this definition. the material they can foul up water treatment processes, impart unpleasant odors or tastes to the water, or look abbreviation meaning defined here. They are, however, expensive, and are not easily cleaned away. most widely known and used of these alternatives. with a good scientific definition and even harder to design a selective test. I took my car to the local grease monkey, and now it runs worse than ever! Another Method Summary – Hexane is used to extract material (ideally just oil and grease) from an acidified aliquot of the sample stream. This method has the advantage of reduced solvent usage (often more than 50% less), no dangerous build up of pressure from the fumes. This trait makes it better for bearings that cannot practically receive new oil on a near-constant basis. Solid additives will cause increased wear in bearings. The degree of oil separation will depend upon the thickener, base oil and manufacturing method. This fibrous network is the thickener mentioned above. crucial step is the evaporation temperature. b : oily matter. But actually, oil and grease are two distinct compounds that … step to keep in mind is to always acidify your blanks and other standards. This is because, while the common perception of oil and grease will be recovered by this method, other materials which are not oil or grease Definitions by the largest Idiom Dictionary. a bribe. stand for in Grease? [1] Greases are usually shear-thinning or pseudo-plastic fluids, which means that the viscosity of the fluid is reduced under shear. To make matters worse, some materials that you would think should be included are not. It categorizes greases suitable for the lubrication of chassis components and wheel bearings of vehicles, based on performance requirements, using codes adopted from the NLGI's “chassis and wheel bearing service classification system”: A given performance category may include greases of different consistencies.[11]. [14], New location: Navigate to USACE Home > [Publications] > [Engineer Manuals] > [EM 1110-2-1424 Lubricants and Hydraulic Fluids]. The hexane is evaporated and the entire amount of residue left behind is defined as oil and grease. Also called grease′ wool`. the organic and aqueous layers. v.t. Grease was designed to be used in many environments that differ one from another. Because different testing methods are looking at different physical properties of oil and grease, there can be differences in the analysis. collection dish or flask. alternative extraction methods provided they adhere to the method definition. This sudden drop in shear force means that grease is considered a plastic fluid, and the reduction of shear force with time makes it thixotropic. are typically not water soluble, the sample is not homogenous with respect to the analyte of interest. SPE is accomplished by passing the sample through a material or as just the non-polar material, with the animal/vegetable material being the difference between the two. What You Should Know – As mentioned previously, a better name for this test is HEM. Grease is a solid or semisolid lubricant formed as a dispersion of thickening agents in a liquid lubricant. The amount of grease in a sample can be determined in a laboratory by extraction with a solvent followed by e.g. Yellow grease is made from darker parts of Oils are thin liquids made of long polymer chains, with additives for various extra properties. Here, soaps disperse and viscosify oil to create the stable gels of greases. Thorsten Bartels et al. The complete unit is placed into an oven at 40 °C (105 °F) for one week. The lime saponifies some of the triglyceride that comprises oil to give a calcium grease. must adhere in order to stay within that definition. of wool or fur : in the natural … The most familiar example of this type of lubricant, used as a surgical and personal lubricant, is K-Y Jelly. Often during the agitation process an emulsion will form between These thickeners impact grease capability and compatibility. c : a thick lubricant. The word grease comes from the Latin word “crassus,” meaning “fat, dense or thick,” which adequately describes its consistency. [3] Soaps include calcium stearate, sodium stearate, lithium stearate, as well as mixtures of these components. figurative (make [sth] go more smoothly) يسرّع الأمور [citation needed]. What does F.O.G. This is because, while the common perception of oil and grease will be recovered by this … The lower temperature lends itself to better standard (oil) 1. [9] Over the centuries, all manner of materials have been employed as greases. The measure of the consistency of grease is commonly expressed by its NLGI consistency number. Enrich your vocabulary with the English Definition dictionary In the context of evaluating and testing, lubricating greases would have been judged based on feel, touch, etc. Oil and Grease Analysis Oil and grease includes fats, oils, waxes, and other related constituents found in water, generally wastewater. AP Grease is a lithium based multifunctional high temperature, water resistant grease. Informal. The main elements of standard ATSM D4950 and NLGI's consistency classification are reproduced and described in standard SAE J310 “automotive lubricating greases” published by SAE International. The hexane is then collected and the extraction repeated two more times. The higher the grade, the thicker the grease. only n-hexane as the active solvent. Definition. In the test, a cup is filled with a given quantity of grease (and is weighed before the test) and a 100 gram weight is placed on top of the grease. that we will explore later, a better name for this particular test would be HEM (Hexane Extractable Material). After sufficient force to shear the grease has been applied, the viscosity drops and approaches that of the base lubricant, such as the mineral oil. … White grease is made from inedible hog fat and has a low content of free fatty acids. They are more flexible and often used in demanding environments due to their inertness. AP Grease. Grease is sometimes used to describe lubricating materials that are simply soft solids or high viscosity liquids, but these materials do not exhibit the shear-thinning properties characteristic of the classical grease. Grease is oil stored in a fibrous network that functions like a sponge. Anything that is soluble in hexane will be counted as ‘oil and grease’ for the purpose of this testing. Household Uses. Failure to do so will result in incomplete adjective capable of lubricating ; used to lubricate . Standard ISO 6743-9 “lubricants, industrial oils and related products (class L) — classification — part 9: family X (greases)”, first released in 1987 by the International Organization for Standardization, establishes a detailed classification of greases used for the lubrication of equipment, components of machines, vehicles, etc. For example, black slugs Arion ater were used as axle-grease to lubricate wooden axle-trees or carts in Sweden.[10]. While dangerous pressure build up, and avoiding the formation of emulsions. Lithium greases are non-corrosive and adhere very well to metal. Apiezon or similar hydrocarbon based greases are the cheapest, and most suitable for high vacuum applications. Because hexane is lighter grease the wheels, grease the way, grease the skids v expr verbal expression: Phrase with special meaning functioning as verb--for example, "put their heads together," "come to an end." A true grease consists of an oil and/or other fluid lubricant that is mixed with a thickener, typically a soap, to form a solid or semisolid. will also be detected. and its NLGI consistency number.[12]. Click here to download a pdf of Understanding Oil & Grease. Definition of grease. One type of lubricant grease used in automobiles is EP2 lithium grease. The differentiation between the two is done by adding an extra step involving silica gel. Silicone grease is based on a silicone oil, usually thickened with amorphous fumed silica. Food-grade lubricant base oil are generally low sulfur petrochemical, less easily oxidized and emulsified. … 2. fatty or oily matter in general; lubricant. which retains the HEM components. it is somewhat easy to say “oil and grease” and have a good idea of what is meant, it is quite difficult to come up when in a soft state. Grease is essentially oil held in a viscous gel or cream whose viscosity is used to hold the oil over time in places where oil alone cannot be supplied constantly enough, and would quickly drip away without the viscous suspension. before the hexane can be collected. 5. to put grease on: to grease the axle of a car. Fluoropolymers containing C-O-C (ether) with fluorine (F) bonded to the carbon. [7][8] Solid additives cannot be used in bearings because of tight tolerances. Definition of oil in the Idioms Dictionary. It is used on sliding doors, windows, hinges, garage door tracks and chains. n., v. greased, greas•ing. Oil separation occurs in reaction to stress, which is a good thing because this is precisely the mechanism that allows oil to be released under … gravimetric determination. Grease generally consists of a soap emulsified with mineral or vegetable oil. Fatty oil-based greases have also been prepared with other thickeners, such as tar, graphite, or mica, which also increase the durability of the grease. The definition of oil and grease is dependent on the procedure and solvent used. Fatty acids derivatives other than stearates are also used, especially lithium 12-hydroxystearate. The sample and solvent are agitated and then allowed "Lubricants and Lubrication" in Ullmann's Encyclopedia of Industrial Chemistry, 2005, Weinheim. Under high pressure or shock loading, normal grease can be compressed to the extent that the greased parts come into physical contact, causing friction and wear. This change in viscosity is called shear thinning. 4. After sufficient force to shear the grease has been applied, the viscosity drops and approaches that of the base lubricant, such as the mineral oil. Solid phase extraction (SPE) is the All rights reserved. Definition of grease in the Idioms Dictionary. Understanding oil bleed and grease separation Tech topic Key insight

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