ASTM D1743-2013 Standard Test Method for Determining Corrosion Preventive Properties of Lubricating Greases《测定润滑脂防腐蚀性的标准试验方法》.pdf
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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
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