ASTM D1264-2003(2008) Standard Test Method for Determining the Water Washout Characteristics of Lubricating Greases《确定润滑脂抗水洗特性的标准试验方法》.pdf

1、Designation: D 1264 03 (Reapproved 2008)An American National StandardStandard Test Method forDetermining the Water Washout Characteristics ofLubricating Greases1This standard is issued under the fixed designation D 1264; the number immediately following the designation indicates the year oforiginal

2、adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense

3、.1. Scope1.1 This test method covers the evaluation of the resistanceof a lubricating grease to washout by water from a bearing,when tested at 38 and 79C (100 and 175F) under theprescribed laboratory conditions. It is not to be considered theequivalent of service evaluation tests. This test method m

4、ay notbe suitable for some greases containing highly volatile com-ponents.1.2 The values state in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its u

5、se. It is theresponsibility of the user this standard to establish appropriatesafety and health practices and determine the applicability ofregulatory limitations prior to use. For specific warningstatements, see 6.3.2. Referenced Documents2.1 ASTM Adjuncts:Standard Ball Bearing2D2PP, Version 4.43,

6、Determination of Precision and BiasData for Use in Test Methods for Petroleum Products33. Summary of Test Method3.1 The grease is packed into a ball bearing, the bearing isthen inserted in a housing with specified clearances, androtated at 600 6 30 rpm. Water, controlled at the specified testtempera

7、ture, impinges on the bearing housing at a rate of 5 60.5 mL/s. The amount of grease washed out in 60 6 1 min isa measure of the resistance of the grease to water washout.4. Significance and Use4.1 This test method estimates the resistance of greases towater washout from ball bearings under conditio

8、ns of the test.No correlation with field service has been established.5. Apparatus5.1 Ball Bearing, ASTM test bearing size 6204 (seeADJD3336).25.2 Bearing Housing and Shield with dimensions as shownin Fig. 1.5.3 Reservoir, Bearing-Housing Mount, Circulating Pump,and Drive Motor, similar or equivalen

9、t to those shown in Fig.1.5.4 Heating Source, to maintain the water temperature at 796 1.7C (175 6 3F).NOTE 1Suitable temperature control may be obtained by the use ofimmersion heaters, steam coils, or infrared heat lamps, in conjunction withtransformers or thermostats.5.5 Thermometer or Thermocoupl

10、e, to determine the tem-perature of the water reservoir.6. Materials and Reagents6.1 Purity of ReagentsReagent grade chemicals 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 Am

11、erican Chemical Society,where such specifications are available.4Other grades may beused, provided it is first ascertained that the reagent is ofsufficiently high purity to permit its use without lessening theaccuracy of the determination.6.2 Distilled Water.6.3 Cleaning SolventCapable of sufficient

12、ly cleaning thetest bearing for use in the test. Either reagent grade Stoddard1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.G0.06 on Functional Tests - Contamination.Current edition approved D

13、ec. 1, 2008. Published February 2009. Originallyapproved in 1953. Last previous edition approved in 2003 as D 1264031.2Available from ASTM International Headquarters. Order Adjunct No.ADJD3336. Original adjunct produced in 1984.3ADJD6300 is no longer available.4Reagent Chemicals, American Chemical S

14、ociety Specifications, AmericanChemical Society, Washington, DC. For Suggestions on the testing of reagents notlisted by the American Chemical Society, see Annual Standards for LaboratoryChemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeiaand National Formulary, U.S. Pharmaco

15、peial Convention, Inc. (USPC), Rockville,MD.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.solvent, also known as Mineral Spirits, (WarningCombustible. Vapor harmful), or American Chemical Societyreagent grade n-heptane4(WarningFlam

16、mable. Harmful ifinhaled) has been found suitable for use.in. mm in. mm F C0.010 0.25 0.875 22.22 100 6 5 37.8 6 30.015 0.38 0.938 23.81 175 6 3 79.4 6 20.031 0.79 214 57.118 3.18 6 152532 3.97316 4.7614 6.35FIG. 1 Water Washout Characteristics of Lubricating Grease ApparatusD 1264 03 (2008)27. Prep

17、aration of Apparatus7.1 Clean the reservoir and water passages by flushing withdistilled water. Wipe off any oil scum which has been depositedon the surfaces of the reservoir. Clean the test bearing withcleaning solvent (see 6.3).8. Procedure8.1 Pack the tared bearing with 4.00 6 0.05 g of test grea

18、se.Insert the bearing and tared shields into the housing, andassemble the unit in the test apparatus.8.2 Add a minimum of 750 mL of preheated distilled waterto the reservoir, but keep the water level below the bearinghousing. Without starting the bearing, start the water circulat-ing pump while dive

19、rting the water spray from the housing bymeans of a piece of tubing attached to the capillary dischargetube or with a deflecting metal shield until equilibrium tem-perature is attained. When the test is to be made at the highertemperature of 79 6 1.7C (175 6 3F), it will be necessary toheat the wate

20、r to the specified temperature by a previouslyselected source of heat.8.2.1 If the rig has one motor driving both pump and testbearing, remove the belt from the test bearing spindle pulleyduring water warm-up time.8.3 When the water reaches the specified temperature,adjust the bypass valve to give a

21、 water-flow rate, through therubber tubing and into a glass graduate, of 5 6 0.5 mL/s (Note2). Remove the rubber tubing from the capillary dischargetube, and adjust the water jet so that it impinges on the endplate 6 mm (14 in.) above the outer opening of the bearinghousing. Start the bearing.NOTE 2

22、Sufficient experience should be obtained with a particulartester to make sure that the water-flow rate can be maintained within thespecified limits for a 60 6 1 min test run.8.4 With the bearing operating at a speed of 600 6 30 rpm,continue the operation for 60 6 1 min.8.5 Shut off the motor and hea

23、ting source, if used. Removethe test bearing and shields and place them on a tared watchglass, with the shields being separated from the bearing andplaced with their inner faces upward to expose the wet greaseto the air.8.6 Dry the bearing and shields for 15 6 0.25hat776 6C(170 6 10F), and then weig

24、h to determine the grease loss(Note 3). The grease remaining on the shields, and any leakageoccurring during the drying period, should not be considered asgrease lost. Duplicate tests shall be run.NOTE 3Some weight loss may be experienced for greases containinghighly volatile oils because of evapora

25、tion during drying.NOTE 4Some greases may contain components which make it diffi-cult to completely dry the sample at 77 6 6C (170 6 10F). For thosegreases, the drying temperature may be increased to 93 6 3C (200 65F) to facilitate removal of water during the time specified.9. Report9.1 Report the a

26、verage of duplicate tests as the percentageweight of grease washed out at the test temperature, andindicate the temperature at which the bearing assembly andgrease were dried.10. Precision and Bias510.1 The precision of this test method was obtained usingADJD6300 (D2PP).310.2 RepeatabilityThe differ

27、ence between successive re-sults obtained by the same operator with the same apparatusunder constant operating conditions on identical test materialwould, in the long run, in the normal and correct operation ofthe test method, exceed the following values only in one casein twenty.Repeatability38C r

28、= 0.8 (X +2)79C r = 0.6 (X + 4.6)where: X is the average of two results in %.10.2.1 Reproducibility The difference between two singleand independent results obtained by different operators work-ing in different laboratories on identical test material would, inthe long run, exceed the following value

29、s only in one case intwenty.Reproducibility38C R = 1.4 (X +2)79C R = 1.1 (X + 4.6)where: X is the average of two results in %.10.3 BiasThe procedure in this test method has no biasbecause the value of grease washout can be defined only interms of a test method.11. Keywords11.1 grease; washout; water

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33、ee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).5Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR: D02-1272 and D021434.D 1264 03 (2008)3