ASTM D4049-2016 Standard Test Method for Determining the Resistance of Lubricating Grease to Water Spray《润滑脂抗水喷雾性测定法》.pdf
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1、Designation: D4049 16Standard Test Method forDetermining the Resistance of Lubricating Grease to WaterSpray1This standard is issued under the fixed designation D4049; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、 revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This test method2covers the ability of a grease to adhereto a metal surface when subjected to a water spray underprescrib
3、ed laboratory conditions.1.2 The values stated in SI units are to be regarded asstandard.1.2.1 ExceptionThe values given in parentheses are forinformation only.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the use
4、r of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:3D217 Test Methods for Cone Penetration of LubricatingGreaseD1742 Test Method for Oil Separation from Lubricating
5、Grease During StorageE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method3. Terminology3.1 Definitions:3.1.1 lubricating grease, na semi-fluid to solid product ofa dispersion of a thickener in a liquid lubricant.3.1.1.1 DiscussionThe dispersion of the thic
6、kener forms atwo-phase system and immobilizes the liquid lubricant bysurface tension and other physical forces. Other ingredients arecommonly included to impart special properties. D2173.1.2 oil separation, nthe appearance of a liquid fractionfrom an otherwise homogeneous lubricating composition.D17
7、423.1.3 thickener, nin lubricating grease, a substance com-posed of finely divided particles dispersed in a liquid lubricantto form the products structure.3.1.3.1 DiscussionThe thickeners can be fibers (such asvarious metallic soaps) or plates or spheres (such as certainnon-soap thickeners), which a
8、re insoluble or, at most, only veryslightly soluble in the liquid lubricant. The general require-ments are that the solid particles be extremely small, uniformlydispersed, and capable of forming a relatively stable, gel-likestructure with the liquid lubricant. D2174. Summary of Test Method4.1 The gr
9、ease to be tested is coated on a stainless steelpanel and sprayed with water at the specified test temperatureand pressure. The amount of grease remaining on the panelafter 5 min 6 15 s is a measure of the resistance of the greaseto water spray.5. Significance and Use5.1 This test method is used to
10、evaluate the ability of agrease to adhere to a metal surface when subjected to directwater spray. The results obtained from the use of this testmethod suggest correlation in operations involving direct waterspray impingement such as steel mill roll neck bearing ser-vice.4This test method is used for
11、 quality control and purchasespecifications.6. Apparatus56.1 Stainless Steel Test Panel, 18-8 (chromium-nickel)stainless steel, as shown in Fig. 1.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility ofS
12、ubcommittee D02.G0.06 on Functional Tests - Contamination.Current edition approved Dec. 1, 2016. Published January 2017. Originallyapproved in 1981. Last previous edition approved in 2011 as D4049 06 (2011).DOI: 10.1520/D4049-16.2The development of this test method is described in Musilli, T. G., “W
13、aterSpray-Off Characteristics of Lubricating Grease,” NLGI Spokesman, December1982, pp. 323326.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Documen
14、t Summary page onthe ASTM website.4Cichelli, A. E. “Evaluation of Greases for Steel Mill Service,” NLGISpokesman, August 1973, and A. E. Cichelli, “Grease Lubrication in Steel Millswith Emphasis on Roll Neck Bearings,” NLGI Spokesman, April 1980.5The sole source of supply of the apparatus known to t
15、he committee at this timeis Koehler Instrument Co., Inc., 1595 Sycamore Ave., Bohemia, NY 11716. If youare aware of alternative suppliers, please provide this information to ASTMInternational Headquarters. Your comments will receive careful consideration at ameeting of the responsible technical comm
16、ittee,1which you may attend.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized princi
17、ples on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.16.1.1 Grease Application Jig, for applying grease to panel;Fig. 2.6.2 Water
18、Spray Apparatus, as shown in Fig. 3.6.3 Spray Nozzle, as shown in Fig. 4.6.4 Thermometer or Thermocouple , capable of measuring38 C 6 0.5 C, to determine the temperature of the waterspray, positioned to prevent breaking the spray pattern.7. Reagents and Materials7.1 Purity of ReagentsReagent grade c
19、hemicals shall beused in all tests. Unless otherwise indicated, it is intended thatall reagents shall conform to the specifications of the commit-tee on Analytical Reagents of the American Chemical Society,where such specifications are available.6Other grades may beused, provided it is first ascerta
20、ined that the reagent is ofsufficiently high purity to permit its use without lessening theaccuracy of the determination.7.2 Mineral Spirits, reagent grade, minimum purity.(WarningCombustible. Vapor harmful.)7.3 n-Heptane, reagent grade, minimum purity.(WarningFlammable. Harmful if inhaled.)8. Sampl
21、ing8.1 Each test will require a quantity sufficient to cover thesteel panel (approximately 4 g to 12 g).8.2 Supply a 25 g (minimum) representative sample.8.3 Examine for any indication of nonhomogeneity, such asoil separation, phase changes, or gross contamination. If anyabnormal conditions are foun
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