ASTM D1743-2013(2018) Standard Test Method for Determining Corrosion Preventive Properties of Lubricating Greases.pdf

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1、Designation: D1743 13 (Reapproved 2018)Standard Test Method forDetermining Corrosion Preventive Properties of LubricatingGreases1This standard is issued under the fixed designation D1743; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revis

2、ion, 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 U.S. Department of Defense.1. Scope1.1 This test metho

3、d covers the determination of the corro-sion preventive properties of greases using grease-lubricatedtapered roller bearings stored under wet conditions. This testmethod is based on CRC Technique L 412that shows correla-tions between laboratory results and service for grease lubri-cated aircraft whe

4、el bearings.1.2 Apparatus DimensionsThe values stated in SI unitsare to be regarded as standard. The values given in parenthesesare for information only.1.3 All Other ValuesThe values stated in SI units are to beregarded as standard. No other units of measurement areincluded in this standard.1.4 Thi

5、s standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 Th

6、is international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade

7、 (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:3D1193 Specification for Reagent WaterD5969 Test Method for Corrosion-Preventive Properties ofLubricating Greases in Presence of Dilute Synthetic SeaWater Environments3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 cor

8、rosion, nthe chemical or electrochemical reac-tion between a material, usually a metal, and its environmentthat produces a deterioration of the material and its properties.3.1.1.1 DiscussionIn this test method, corrosion is mani-fested by red rust or black stains on the bearing race. Stains,through

9、which the underlying metal surface is still visible, arenot considered corrosion in Test Method D1743 and shall beignored.4. Summary of Test Method4.1 New, cleaned, and lubricated bearings are run under alight thrust load for 60 s 6 3 s to distribute the lubricant in apattern that might be found in

10、service. The bearings areexposed to water, then stored for 48 h 6 0.5 h at 52 C 6 1C(125 F 6 2 F) and 100 % relative humidity. After cleaning,the bearing cups are examined for evidence of corrosion.5. Significance and Use5.1 This test method differentiates the relative corrosion-preventive capabilit

11、ies of lubricating greases under the condi-tions of the test.6. Apparatus6.1 BearingsTimken bearing cone and roller assemblyLM11949, and cup LM11910.4,56.2 Motor, 1750 r min 6 50 r min speed,115 hp (min).6.3 Bearing Holder, consists of a 1 kg 6 0.10 kg weight,upper and lower plastic collars for the

12、bearing cone (Parts Aand B), a metal screw, and a plastic collar for the cup (Part C).(See Fig. 1.)1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility ofSubcommittee D02.G0.06 on Functional Tests - Cont

13、amination.Current edition approved April 1, 2018. Published May 2018. Originallyapproved in 1960. Last previous edition approved in 2013 as D1743 13. DOI:10.1520/D1743-13R18.2“Research Technique for Determining Rust-Preventive Properties of Lubricat-ing Greases in the Presence of Free Water,” L-41-9

14、57, undated, CoordinatingResearch Council, Inc., 219 Perimeter Center Parkway, Atlanta, GA 30346.3For 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 Docum

15、ent Summary page onthe ASTM website.4The sole source of supply of the apparatus known to the committee at this timeis The Timken Co., Canton, OH 44706.5If you are aware of alternative suppliers, please provide this information toASTM International Headquarters. Your comments will receive careful con

16、sider-ation at a meeting of the responsible technical committee,1which you may attend.Copyright 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 principles on

17、 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.1KEY DESCRIPTION QUANTITY1PISTON 12 O RING 13 WEIGHT 14 UPPER FLANGE 15 LOWER FLANGE

18、 1614 201-14 FILLISTER HD. MACH. SCREW S.S. 17 O RING 18 BEARING HOLDER 19 PLASTIC JAR 110 O RING 1FIG. 1 Bearing Holder AssemblyD1743 13 (2018)26.4 Plastic Test Jar, as shown in Fig. 2.6.5 Run-in Stand, as shown in Fig. 3.6.6 Spindle/Thrust Loading Device, as shown in Fig. 4. (SeeTable 1 for metric

19、 equivalents.)6.7 Mechanical Grease Packer, as shown in Fig. 5 and Fig.6.6.8 Pliers,5,6as shown in Fig. 7.6.9 Syringe, of at least 100 mL volume and with a needle ofat least 16 gauge and a minimum length of 100 mm (4 in.).6.10 Timer, capable of measuring a 60 s 6 3 s interval.6.11 OvenA laboratory o

20、ven, essentially free of vibration,capable of maintaining 52 C 6 1 C.7. Reagents7.1 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 Ame

21、rican Chemical Society,where such specifications are available.7Other 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.7.2 Purity of WaterUnless otherwise indicated, referencesto wa

22、ter shall be understood to mean freshly boiled doubledistilled water, or water conforming to Specification D1193,Type II.7.3 Isopropyl Alcohol. WarningFlammable.7.4 Solvent Rinse Solution of the following composition byvolume:7.4.1 Isopropyl Alcohol, 90 %.7.4.2 Distilled Water, 9%.7.4.3 Ammonium Hyd

23、roxide, 1%. WarningPoison.Causes burns. Vapor extremely irritating. Can be fatal ifswallowed. Harmful if inhaled.7.5 Mineral Spirits, reagent grade, minimum purity.(WarningCombustible. Vapor harmful.)8. Standardization of Thrust Loading Device8.1 Pack a bearing, install it into the holder and place

24、theassembly into a plastic jar as described in 10.1 through 10.4.Place the jar onto the base of the motor drive spindle and centerit under the indexing pin of the drive. Lower the drive until theO ring just contacts the 1 kg weight. Run the bottom nut of thedepth gage (see Fig. 3) down to the stop.

25、Place a 3 mm spaceron top of this nut. Bring the top nut down to the spacer. Whileholding the top nut in position, remove the spacer and run thebottom nut up and tighten it against the top nut. When the Oring is compressed against the 1 kg weight until the adjustmentnut hits the stop, there will be

26、a 29 N load added, giving a totalload of 39 N on the bearing. (The loads described are providedby the forces of the spring in the thrust loading spindle and sumof the 1 kg weight and spring, respectively. These loads areapproximate. The 1 kg weights should be within 0.010 kg oftheir stated values. T

27、he thrust loading spindle should becalibrated by some suitable method when it is first put intoservice, recalibrated periodically, and replaced if its springdoes not provide sufficient force to spin the test bearingswithout slippage during the 60 s run to distribute the grease.)Examine the O ring pe

28、riodically and replace it if it shows anycracks or other signs of deterioration.8.2 The thrust loading device should be standardized beforeuse, once per day if used daily, and again if there is reason tobelieve that the standardization has changed. The thrust load-ing device may be standardized usin

29、g one of the greases to betested.9. Preparation of Bearings9.1 Examine the test bearings carefully and select onlybearings that have outer races (cups) and rollers entirely free ofcorrosion. During the bearing preparation handle the bearingswith tongs or rubber or plastic gloves. Do not touch bearin

30、gswith the fingers at any time.9.2 Wash the selected bearing thoroughly in hot (52 C to66 C) mineral spirits, reagent grade (WarningCombustible.Vapor harmful.) to remove the rust preventive. Wipe thebearing cone and cup with tissue moistened in hot solvent to6The sole source of supply of the Waldes

31、Truarc Plier No. 4 modified as in Fig.7 known to the committee at this time is TRUARC Company LLC, 70 East WillowStreet, Millburn, NJ 07041.7Reagent Chemicals, American Chemical Society Specifications, AmericanChemical Society, Washington, DC. For Suggestions on the testing of reagents notlisted by

32、the American Chemical Society, see Annual Standards for LaboratoryChemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeiaand National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,MD.Test Jar SpecificationsInner Diameter Range: 3.11 in. 3.31 in. (79 mm 84 mm)I

33、nner Height Range: 3.5 in. 4.0 in. (89 mm 102 mm)FIG. 2 Plastic Test JarD1743 13 (2018)3FIG. 3 Run-in Stand DrawingFIG. 4 Spindle/Thrust Loading DeviceD1743 13 (2018)4remove any remaining residue. Rinse the bearing a second timein fresh, hot mineral spirits, reagent grade.NOTE 1The washing temperatu

34、res specified are considerably abovethe flash point of the mineral spirits, reagent grade. Accordingly, thewashing operation should be carried out in a well-ventilated hood whereno flames or other ignition sources are present.9.3 Transfer the bearing from the mineral spirits, reagentgrade to the sol

35、vent rinse solution (WarningPoison. Causesburns. Vapor extremely irritating. Can be fatal if swallowed.Harmful if inhaled.) to remove the mineral spirits, reagentgrade and any fingerprints that are present. Then rinse thebearing and slowly rotate in fresh hot (66 C 6 5 C) solventrinse solution.NOTE

36、2Use fresh rinse solution to avoid the selective evaporation ofthe components at the rinse temperature.9.4 Remove the bearing from the solvent rinse solution andplace on filter paper to drain. After draining, dry the bearing inan oven at 70 C 6 5 C for 15 min to 30 min.9.5 Permit the bearing to cool

37、 to room temperature andreexamine surfaces to assure that corrosion-free and free-turning specimens have been selected. (Care should be takennot to spin the bearings after cleaning and drying.)9.6 Wash and dry the bearing packer using the sametechnique as for the preparation of the bearings.10. Proc

38、edure10.1 With the reservoir of grease packer resting on a cleanbench top, and while wearing gloves, place bearing cup withsmall diameter face down into the recess of the packer. Placethe bearing cone over the cup, and while holding the bearingassembly against the packer, lift and invert the whole u

39、nit andreturn it to the bench.10.2 Fill the reservoir with the grease sample, and use theplunger to force grease through the bearing. Carefully removethe plunger from the reservoir to avoid sucking air into thebearing, and slide the packer unit over the edge of the bench.While holding the bearing as

40、sembly in the packer, invert theunit to its original position on the bench.10.3 Using a small square-ended spatula, remove excessgrease from the bearing bore and the annulus between thegrease packer and outer perimeter of the bearing cup. Thebearing is removed from the packer by either use of the pl

41、iersor by placing gloved index finger in the bore and lifting out.While holding the bearing, use the spatula to remove excessgrease above the cage on both sides of the bearing. Thisprocedure is done to ensure that approximately the samevolume of grease is used each time.10.4 Using Fig. 1 as a guide,

42、 hold the packed bearingbetween gloved fingers with large inside diameter of cupdownward and insert the small diameter plastic flange on top ofthe bore, and the larger flange into the bottom of the bore. Slidethe bearing assembly onto the 1 kg weight so that the largediameter flange fits into the re

43、cess on the top of the weight.Insert the bolt through the assembly and screw the bolt tightlyinto the weight. Lower the plastic bearing holder (Part 8) overthe bearing (the large O ring faces upward). Press down theholder so that the bearing fits squarely into the holder.NOTE 3If bearing holders and

44、 plastic test jars are used interchange-ably for Test Method D5969 and D1743, thoroughly clean the testapparatus to prevent contamination affecting the test results.10.5 Invert a plastic jar over the bearing assembly. Slide thetwo components over the edge of the bench, and with fingerspressing the w

45、eight against the inner bottom of the jar, invertthe entire assembly.10.6 Place the jar onto the base of the motor driven spindleand center under the indexing pin of the drive. Start the motorand bring the drive into the center of the 1 kg weight and loaduntil the nut hits the depth stop. Run for 60

46、 s, raise the drive,and allow the bearing to coast to a stop. Extreme care shouldbe taken not to break the contact between the races and rollersat this point and in the following steps.10.6.1 At no time during or after the 60 s run shall thegrease be redistributed or forced back into the bearing.10.

47、7 Freshly boil the distilled water for 10 min 6 5 min toremove carbon dioxide and cool to 25 C 6 5 C.10.8 Fill a clean syringe with 100 mL 6 5 mL of distilledwater from 10.7. With the run-in bearing in the jar, simultane-ously start a timer and begin adding the water into the holeprovided for this p

48、urpose in the bearing holder. Add the100 mL of water within 20 s 6 3 s. When the timer shows 50 s6 3 s start withdrawing the water. When the timer shows 60 s6 3 s, complete the withdrawal of 70 mL 6 5 mL of water.Leave the remaining 30 mL 6 5 mL of water in the jar. Makesure that water does not touc

49、h the bearing after 70 mL 6 5mLis withdrawn. It may be difficult to withdraw 70 mL 6 5mLwater in 10 s using a 16 gauge needle. A larger needle may berequired.10.9 Screw the cap on the jar and transfer to a dark ovenessentially free from vibration for 48 h at 52 C 6 1 C.TABLE 1 Metric Equivalents for Figs. 3 and 4Inches Millimetres132 0.7918 3.18532 3.97316 4.76532 7.14516 7.9438 9.53716 11.1112 12.701932 15.082132 16.6734 19.051 25.40118 28.581316 31.26114 31.7511132 34.131.495 37.971.500 38.101916 39.69114 44.451.