1、Designation: D1743 10D1743 13Standard 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 revision, the y
2、ear 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.1. Scope*1.1 This test method covers the d
3、etermination of the corrosion preventive properties of greases using grease-lubricated taperedroller bearings stored under wet conditions. This test method is based on CRC Technique L 412 that shows correlations betweenlaboratory results and service for grease lubricated aircraft wheel bearings.1.2
4、Apparatus DimensionsThe values stated in SI units are to be regarded as standard. The values given in parentheses arefor information only.1.3 All Other ValuesThe values stated in SI units are to be regarded as standard. No other units of measurement are includedin this standard.1.4 This standard doe
5、s not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations prior to use.2. Referenced Documents2.1 ASTM Standa
6、rds:3D1193 Specification for Reagent WaterD5969 Test Method for Corrosion-Preventive Properties of Lubricating Greases in Presence of Dilute Synthetic Sea WaterEnvironments3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 corrosion, nthe chemical or electrochemical reaction betw
7、een a material, usually a metal, and its environment thatproduces a deterioration of the material and its properties.3.1.1.1 DiscussionIn this test method, corrosion is manifested by red rust or black stains on the bearing race. Stains, through which the underlyingmetal surface is still visible, are
8、 not considered corrosion in Test Method D1743 and shall be ignored.4. Summary of Test Method4.1 New, cleaned, and lubricated bearings are run under a light thrust load for 60 6 3 s to distribute the lubricant in a patternthat might be found in service. The bearings are exposed to water, then stored
9、 for 48 6 0.5 h at 52 6 1C (125 6 2F) and 100 %relative humidity. After cleaning, the bearing cups are examined for evidence of corrosion.1 This test method is under the jurisdiction of ASTM Committee D02 on Petroleum Products and Lubricants and is the direct responsibility of Subcommittee D02.G0.06
10、on Functional Tests - Contamination.Current edition approved May 1, 2010May 1, 2013. Published June 2010May 2013. Originally approved in 1960. Last previous edition approved in 20052010 asD1743D1743 10.05a1. DOI: 10.1520/D1743-10.10.1520/D1743-13.2 “Research Technique for Determining Rust-Preventive
11、 Properties of Lubricating Greases in the Presence of Free Water,” L-41-957, undated, Coordinating ResearchCouncil, Inc., 219 Perimeter Center Parkway, Atlanta, GA 30346.3 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annua
12、l Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be t
13、echnically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of t
14、his standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15. Significance and Use5.1 This test method differentiates the relative corrosion-preventive capabilities of lubricating greases under the conditions ofthe test.6. Apparatus6
15、.1 BearingsTimken bearing cone and roller assembly LM11949, and cup LM11910.4 ,56.2 Motor, 1750 6 50-rpm speed, 115 hp (min).6.3 Bearing Holder, consists of a 1 6 0.10 kg weight, upper and lower plastic collars for the bearing cone (Parts A and B), ametal screw, and a plastic collar for the cup (Par
16、t C). (See Fig. 1.)6.4 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. (See Table 1 for metric equivalents.)6.7 Mechanical Grease Packer, as shown in Fig. 5 and Fig. 6.6.8 Pliers, 5,6 as shown in Fig. 7.6.9 Syringe, of
17、at least 100-mL volume and with a needle of at least 16 gage and a minimum length of 100 mm (4 in.).6.10 Timer, capable of measuring a 60 6 3-s interval.6.11 OvenA laboratory oven, essentially free of vibration, capable of maintaining 52 6 1C.7. Reagents7.1 Purity of ReagentsReagent grade chemicals
18、shall be used in all tests. Unless otherwise indicated, it is intended that allreagents shall conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society, wheresuch specifications are available.7 Other grades may be used, provided it is first ascertained th
19、at the reagent is of sufficiently highpurity to permit its use without lessening the accuracy of the determination.7.2 Purity of WaterUnless otherwise indicated, references to water shall be understood to mean reagent freshly boiled doubledistilled water, or water conforming to Specification D1193,
20、Type III.II.7.3 Isopropyl Alcohol. WarningFlammable.7.4 Solvent Rinse Solution of the following composition by volume:7.4.1 Isopropyl Alcohol, 90 %.7.4.2 Distilled Water, 9 %.7.4.3 Ammonium Hydroxide, 1 %. WarningPoison. Causes burns. Vapor extremely irritating. Can be fatal if swallowed.Harmful if
21、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 the assembly into a plastic jar as described in 10.1 through 10.4. Placethe jar onto the base of the mot
22、or drive spindle and center it under the indexing pin of the drive. Lower the drive until the O ringjust contacts the 1-kg weight. Run the bottom nut of the depth gage (see Fig. 3) down to the stop. Place a 3-mm spacer on topof this nut. Bring the top nut down to the spacer. While holding the top nu
23、t in position, remove the spacer and run the bottom nutup and tighten it against the top nut. When the O ring is compressed against the 1-kg weight until the adjustment nut hits the stop,there will be a 29-N load added, giving a total load of 39 N on the bearing. (The loads described are provided by
24、 the forces ofthe spring in the thrust loading spindle and sum of the 1-kg weight and spring, respectively. These loads are approximate. The 1-kgweights should be within 0.010 kg of their stated values. The thrust loading spindle should be calibrated by some suitable methodwhen it is first put into
25、service, recalibrated periodically, and replaced if its spring does not provide sufficient force to spin the testbearings without slippage during the 60 s run to distribute the grease.) Examine the O ring periodically and replace it if it showsany cracks or other signs of deterioration.4 The sole so
26、urce of supply of the apparatus known to the committee at this time is The Timken Co., Canton, OH 44706.5 If you are aware of alternative suppliers, please provide this information to ASTM International Headquarters. Your comments will receive careful consideration at ameeting of the responsible tec
27、hnical committee,1 which you may attend.6 The sole source of supply of the Waldes Truarc Plier No. 4 modified as in Fig. 7 known to the committee at this time is TRUARC Company LLC, 70 East Willow Street,Millburn, NJ 07041.7 Reagent Chemicals, American Chemical Society Specifications, American Chemi
28、cal Society, Washington, DC. For Suggestions on the testing of reagents not listed bythe American Chemical Society, see Annual Standards for Laboratory Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia and NationalFormulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rock
29、ville, MD.D1743 132KEY DESCRIPTION QUANTITY1 PISTON 12 O RING 13 WEIGHT 14 UPPER FLANGE 15 LOWER FLANGE 16 14 20 1-14 FILLISTER HD. MACH. SCREW S.S. 17 O RING 18 BEARING HOLDER 19 PLASTIC JAR 110 O RING 1FIG. 1 Bearing Holder AssemblyD1743 1338.2 The thrust loading device should be standardized befo
30、re use, once per day if used daily, and again if there is reason to believethat the standardization has changed. The thrust loading device may be standardized using one of the greases to be tested.9. Preparation of Bearings9.1 Examine the test bearings carefully and select only bearings that have ou
31、ter races (cups) and rollers entirely free ofcorrosion. During the bearing preparation handle the bearings with tongs or rubber or plastic gloves. Do not touch bearings withthe fingers at any time.9.2 Wash the selected bearing thoroughly in hot (52 to 66C) mineral spirits, reagent grade (Warning Com
32、bustible. Vaporharmful.) to remove the rust preventive. Wipe the bearing cone and cup with tissue moistened in hot solvent to remove anyremaining residue. Rinse the bearing a second time in fresh, hot mineral spirits, reagent grade.NOTE 1The washing temperatures specified are considerably above the
33、flash point of the mineral spirits, reagent grade. Accordingly, the washingoperation should be carried out in a well-ventilated hood where no flames or other ignition sources are present.9.3 Transfer the bearing from the mineral spirits, reagent grade to the solvent rinse solution (Warning Poison. C
34、auses burns.Vapor extremely irritating. Can be fatal if swallowed. Harmful if inhaled.) to remove the mineral spirits, reagent grade and anyfingerprints that are present. Then rinse the bearing and slowly rotate in fresh hot (66 6 5C) solvent rinse solution.NOTE 2Use fresh rinse solution to avoid th
35、e selective evaporation of the components at the rinse temperature.9.4 Remove the bearing from the solvent rinse solution and place on filter paper to drain. After draining, dry the bearing in anoven at 70 6 5C for 15 to 30 min.9.5 Permit the bearing to cool to room temperature and reexamine surface
36、s to assure that corrosion-free and free-turningspecimens have been selected. (Care should be taken not to spin the bearings after cleaning and drying.)9.6 Wash and dry the bearing packer using the same technique as for the preparation of the bearings.10. Procedure10.1 With the reservoir of grease p
37、acker resting on a clean bench top, and while wearing gloves, place bearing cup with smalldiameter face down into the recess of the packer. Place the bearing cone over the cup, and while holding the bearing assemblyagainst the packer, lift and invert the whole unit and return it to the bench.10.2 Fi
38、ll the reservoir with the grease sample, and use the plunger to force grease through the bearing. Carefully remove theplunger from the reservoir to avoid sucking air into the bearing, and slide the packer unit over the edge of the bench. While holdingthe bearing assembly in the packer, invert the un
39、it to its original position on the bench.Test Jar SpecificationsInner Diameter Range: 3.113.31 in. (7984 mm)Inner Height Range: 3.54.0 in. (89102 mm)FIG. 2 Plastic Test JarD1743 134FIG. 3 Run-in Stand DrawingFIG. 4 Spindle/Thrust Loading DeviceD1743 13510.3 Using a small square-ended spatula, remove
40、 excess grease from the bearing bore and the annulus between the greasepacker and outer perimeter of the bearing cup. The bearing is removed from the packer by either use of the pliers or by placinggloved index finger in the bore and lifting out. While holding the bearing, use the spatula to remove
41、excess grease above the cageon both sides of the bearing. This procedure is done to ensure that approximately the same volume of grease is used each time.10.4 Using Fig. 1 as a guide, hold the packed bearing between gloved fingers with large inside diameter of cup downward andinsert the small diamet
42、er plastic flange on top of the bore, and the larger flange into the bottom of the bore. Slide the bearingassembly onto the 1-kg weight so that the large diameter flange fits into the recess on the top of the weight. Insert the bolt throughthe assembly and screw the bolt tightly into the weight. Low
43、er the plastic bearing holder (Part 8) over the bearing (the large Oring faces upward). Press down the holder so that the bearing fits squarely into the holder.NOTE 3If bearing holders and plastic test jars are used interchangeably for Test Method D5969 and D1743, thoroughly clean the test apparatus
44、 toprevent contamination affecting the test results.10.5 Invert a plastic jar over the bearing assembly. Slide the two components over the edge of the bench, and with fingerspressing the weight against the inner bottom of the jar, invert the entire assembly.10.6 Place the jar onto the base of the mo
45、tor driven spindle and center under the indexing pin of the drive. Start the motor andbring the drive into the center of the 1-kg weight and load until the nut hits the depth stop. Run for 60 s, raise the drive, and allowthe bearing to coast to a stop. Extreme care should be taken not to break the c
46、ontact between the races and rollers at this pointand in the following steps.10.6.1 At no time during or after the 60 s run shall the grease be redistributed or forced back into the bearing.10.7 Freshly boil the distilled water for 10 6 5 min to remove carbon dioxide and cool to 25 6 5C.10.8 Fill a
47、clean syringe with 100 6 5 mL of distilled water from 10.7. With the run-in bearing in the jar, simultaneously starta timer and begin adding the water into the hole provided for this purpose in the bearing holder. Add the 100 mL of water within20 6 3 s. When the timer shows 50 6 3 s start withdrawin
48、g the water. When the timer shows 60 6 3 s, complete the withdrawalof 70 6 5 mL of water. Leave the remaining 30 6 5 mL of water in the jar. Make sure that water does not touch the bearing after70 6 5 mL is withdrawn. It may be difficult to withdraw 70 6 5 mL water in 10 s using a 16 gage needle. A
49、larger needle maybe required.10.9 Screw the cap on the jar and transfer to a dark oven essentially free from vibration for 48 h at 52 6 1C.10.10 Prepare three bearings with each grease to be tested. Each group of three bearings is one test.11. Rating Procedure11.1 Remove the bearing from the test jar and place the bearing cup in a 50 + 50 mixture by volume of isopropyl alcohol(WarningFlammable) and mineral spirits, reagent grade (WarningCombustible. Vapor harmful). The solvent mixture can beTABLE 1 Metric Equivalents for Figs. 3 and 4In
