ASTM D1264-2012 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: D1264 12Standard Test Method forDetermining the Water Washout Characteristics ofLubricating Greases1This standard is issued under the fixed designation D1264; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of

2、 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.1. Scope*1.1 This test method covers the evaluat

3、ion 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. Precision and bias wasdetermined using grease ranging from NLGI 3

4、to 0 grades inthe research report (see Section 10).1.2 This test method may not be suitable for some greasescontaining highly volatile components. This test method doesnot attempt to account for sample evaporation. It is the usersresponsibility to determine if evaporation of the sample is asignifica

5、nt contributor to mass loss at the required dryingtemperature.1.3 The values state in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is th

6、eresponsibility 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, Determinatio

7、n 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 testtemperature, imping

8、es 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 conditions of the te

9、st.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 equivalent to those sh

10、own in Fig.1.5.4 Heating Source, to maintain the water temperature at38C 6 1.7C (100F 6 3F) or 79C 6 1.7C (174F 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

11、 or Thermocouple , 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 that1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Produ

12、cts and Lubricants and is the direct responsibility of SubcommitteeD02.G0.06 on Functional Tests - Contamination.Current edition approved Dec. 1, 2012. Published March 2013. Originallyapproved in 1953. Last previous edition approved in 2011 as D126411. DOI:10.1520/D1264-12.2Available from ASTM Inter

13、national Headquarters. Order Adjunct No.ADJD3336. Original adjunct produced in 1984.3ADJD6300 is no longer available.*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 States1in.

14、mm in. mm F C0.010 0.25 0.875 22.22 100 3 38 1.70.015 0.38 0.938 23.81 174 3 79 1.70.031 0.79 214 57.118 3.18 6 152532 3.97316 4.7614 6.35FIG. 1 Water Washout Characteristics of Lubricating Grease ApparatusD1264 122all reagents shall conform to the specifications of the commit-tee on Analytical Reag

15、ents of the American 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

16、 of sufficiently cleaning thetest bearing for use in the test. Either reagent grade Stoddardsolvent, also known as Mineral Spirits, (WarningCombustible. Vapor harmful), or American Chemical Societyreagent grade n-heptane4(WarningFlammable. Harmful ifinhaled) has been found suitable for use.7. Prepar

17、ation 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 grease

18、.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 divert

19、ing 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 testtemperatures of 38C 6 1.7C (100F 6 3F) or 79C 6 1.7C(174F 6 3F), it will be n

20、ecessary to heat the water to thespecified temperature by a previously selected 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 t

21、he bypass valve to give a 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.

22、 Start the bearing.NOTE 2Sufficient 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 S

23、hut off the motor and heating 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 2C(

24、170 6 4F), and then weigh to determine the grease loss (Note3). 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

25、 oils because of evaporation during drying.NOTE 4Some greases contain components that make it difficult tocompletely dry the sample at 77 6 2C (170 6 4F). If a weight gain isobserved after drying for 15 h at 77 6 2C (1706 4F), then the sampleshould be dried for an additional 15 h at 93 6 2C (200 6 4

26、F). If aweight gain is still observed after drying for 15 h at 93 62C (200 6 4F),then the sample should be dried for an additional 15 h at 1156 2C (2396 4F). If needed, each additional drying step should commence on thesame day that the previous drying step completed. Between drying steps,the sample

27、 should be kept in a desiccator, and great care should be usedwhen handling the sample to avoid removing any material.9. Report9.1 Report the average of duplicate tests as the percentageweight of grease washed out at the test temperature, andindicate the temperature at which the bearing assembly and

28、grease were dried.10. Precision and Bias510.1 The precision of this test method was obtained usingADJD6300 (D2PP).310.2 The precision of this test method was determined bydrying the bearing assembly and grease at 77C (170F). Theprecision statement does not apply to samples which are driedat the high

29、er temperatures given in Note 4.10.3 RepeatabilityThe difference 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 fo

30、llowing values only in one casein twenty.Repeatability38C r = 0.8 (X +2)79C r = 0.6 (X + 4.6)where: X is the average of two results in %.10.3.1 Reproducibility The difference between two singleand independent results obtained by different operators work-ing in different laboratories on identical tes

31、t material would, inthe long run, exceed the following values 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 %.10.4 BiasThe procedure in this test method has no biasbecause the value of grease washout can be defined only inte

32、rms of a test method.4Reagent Chemicals, American Chemical Society 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 Uni

33、ted States Pharmacopeiaand National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,MD.5Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR:D02-1272 and RR:D02-1434.D1264 12311. Keywords11.1 grease; washout; waterSUM

34、MARY OF CHANGESSubcommittee D02.G0.06 has identified the location of selected changes to this standard since the last issue(D126411) that may impact the use of this standard.(1) Added 1.2.(2) Revised 8.6.(3) Revised Note 4.(4) Added 10.2.ASTM International takes no position respecting the validity o

35、f any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to

36、 revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters.

37、Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is c

38、opyrighted 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D1264 124