1、Designation: D5969 111Standard Test Method forCorrosion-Preventive Properties of Lubricating Greases inPresence of Dilute Synthetic Sea Water Environments1This standard is issued under the fixed designation D5969; the number immediately following the designation indicates the year oforiginal adoptio
2、n 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.1NOTEFig. 6 was editorially reinstated in January 2013.1. Scope*1.1 This test method co
3、vers the determination of thecorrosion-preventive properties of greases using grease-lubricated tapered roller bearings exposed to various concen-trations of dilute synthetic sea water stored under wet condi-tions. It is based on Test Method D1743, which is practicedusing a similar procedure and dis
4、tilled water. The reportedresult is a pass or fail rating as determined by at least two ofthree bearings.1.2 Apparatus DimensionsThe values stated in inch-pound units are to be regarded as standard. The values given inparentheses are mathematical conversions to SI units that areprovided for informat
5、ion only and are not considered standard.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 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresp
6、onsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D665 Test Method for Rust-Preventing Characteristics ofInhibited Mineral Oil in the Presenc
7、e of WaterD1193 Specification for Reagent WaterD1743 Test Method for Determining Corrosion PreventiveProperties of Lubricating Greases3. Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 corrosionthe chemical or electrochemical reactionbetween a material, usually a metal, and its e
8、nvironment thatproduces 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 which the underlying metal surface is still visible, arenot considered corrosion in Test Method D
9、5969 and shall beignored. D17434. Summary of Test Method4.1 New, cleaned, and lubricated bearings are run under alight thrust load for 60 6 3 s to distribute the lubricant in apattern that might be found in service. The bearings areexposed to a solution of synthetic sea water at some percentagein di
10、stilled water, then stored for 24 612 hat526 1C and100 % relative humidity. After cleaning, the bearing cups areexamined for evidence of corrosion.5. Significance and Use5.1 This test method differentiates the relative corrosion-preventive capabilities of lubricating greases under the testconditions
11、.6. Apparatus6.1 Bearings, Timken bearing cone and roller assemblyLM11949 and cup LM11910.36.2 Motor, 1750-rpm (approximate) speed,115 hp (min).6.3 Bearing Holder, (see Fig. 1) consists of a 1 6 0.01-kgmass, upper and lower plastic collars for the bearing cone(Parts A and B), a metal screw, and a pl
12、astic collar for the cup(Part C).6.4 Plastic Test Jar, as shown in Fig. 2.1This 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 May 1
13、, 2011. Published May 2011. Originallyapproved in 1996. Last previous edition approved in 2008 as D596908. DOI:10.1520/D5969-11.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume informatio
14、n, refer to the standards Document Summary page onthe ASTM website.3Manufactured by the Timken Co., Canton, OH 44706.*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 States1KEY
15、DESCRIPTION QUANTITY1 PISTON 12 O RING 13 WEIGHT 14 UPPER FLANGE 15 LOWER FLANGE 1614 201-14 FILLISTER HD. MACH. SCREW S.S. 17 O RING 18 BEARING HOLDER 19 PLASTIC JAR 110 O RING 1FIG. 1 Test Method D1743 Bearing Holder AssemblyD5969 11126.5 Run-in Stand,4as shown in Fig. 3.6.6 Spindle/Thrust Loading
16、 Device,3as shown in Fig. 4.6.7 Mechanical Grease Packer, as shown in Fig. 5.6.8 Pliers,5as shown in Fig. 6.6.9 Syringe, of at least 100 6 5 mL volume and with aneedle of at least 16 gauge and a minimum length of 100 mm(4 in.).6.10 Timer, capable of measuring a 60 6 3-s interval.6.11 Oven, a laborat
17、ory oven, essentially free of vibration,capable of maintaining 52 6 1C.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 A
18、merican Chemical Society,where such specifications are available.6Other grades may beused, provided that 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, referenc
19、esto water shall be understood to mean reagent water conformingto Specification D1193, Type III.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 %, and7.4.3 Ammonium Hydroxide, 1%. (Warn
20、ingPoison.Causes burns. Vapor extremely irritating. May be fatal ifswallowed. Harmful if inhaled.)7.5 Mineral Spirits, reagent grade, minimum purity.(WarningCombustible. Vapor harmful.)7.6 Synthetic Sea Water, prepared as described in TestMethod D665.(WarningPoison. May be fatal if swal-lowed.)8. St
21、andardization of Thrust Loading Device8.1 Pack a bearing, and install it into the holder. Place theassembly into a plastic jar as described in 10.1-10.4. Place thejar onto the base of the motor drive spindle and center it underthe indexing pin of the drive. Lower the drive until the O-ringjust conta
22、cts the 1-kg weight. Run the bottom nut of the depthgauge (see Fig. 3) down to the stop. Place a 3-mm spacer ontop 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 theO-ring is
23、 compressed against the 1-kg weight until the adjust-ment nut hits the stop, there will be a 29-N load added, givinga total load of 39 N on the bearing. (The loads described areprovided by the forces of the spring in the thrust loadingspindle and the sum of the 1-kg weight and spring, respec-tively.
24、 These loads are approximate. The 1-kg weights shouldbe within 0.010 kg of their stated values. The thrust loadingspindle should be calibrated by some suitable method when itis first put into service, recalibrated periodically, and replacedif its spring does not provide sufficient force to spin the
25、testbearings without slippage during the 60-s run to distribute thegrease.) Examine the O-ring periodically, and replace it if itshows any cracks 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 t
26、obelieve that the standardization has changed. The thrust load-ing device may be standardized using 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
27、bearing preparation, handle the bearingswith tongs or rubber or plastic gloves. Do not touch bearingswith the fingers at any time.9.2 Wash the selected bearings thoroughly in hot (52 to66C) mineral spirits, reagent grade (Warningsee 7.5)to4The sole source of supply of the apparatus known to the comm
28、ittee at this timeis Falex Corp., 1020 Airpark Drive, Sugar Grove, IL, 60554. If you are aware ofalternative suppliers, please provide this information to ASTM InternationalHeadquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee,1which you ma
29、y attend.5AWaldes Truarc Plier No. 4, available from Truarc Co., or similar, modified asin Fig. 6.6Reagent Chemicals, American Chemical Society Specifications, AmericanChemical Society, Washington, DC. For Suggestions on the testing of reagents notlisted by the American Chemical Society, see Annual
30、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: 3.113.31 in. (7984 mm)Inner Height Range: 3.54.0 in. (89102 mm)FIG. 2 Plas
31、tic Test JarD5969 1113remove the rust preventive. To ensure complete removal of therust preventive, subject the bearings to a second wash in freshhot mineral spirits, reagent grade.NOTE 1The washing temperatures specified are considerably abovethe flash point of the solvent. Accordingly, the washing
32、 operation shouldbe carried out in a well-ventilated hood where no flames or other ignitionsources are present.9.3 Transfer the bearing from the mineral spirits, reagentgrade to the solvent rinse solution (Warningsee 7.4.3)toremove the mineral spirits, reagent grade and any fingerprintsthat may be p
33、resent. Then rinse the bearing and slowly rotateit in fresh hot (66 6 5C) solvent rinse solution.NOTE 2Fresh solvent rinse solution must be used to avoid selectiveevaporation of the components at the rinse temperature.9.4 Remove the bearing from the solvent rinse solution andplace it on filter paper
34、 to drain. After draining, dry the bearingin an oven at 70 6 5C for 15 to 30 min.9.5 Permit the bearing to cool to room temperature andreexamine its surfaces to ensure that corrosion-free and free-turning specimens have been selected. (Take care not to spinthe bearings after cleaning and drying.)9.6
35、 Wash and dry the bearing packer using the sametechnique as for the preparation of the bearings.10. Procedure10.1 With the reservoir of the grease packer resting on aclean bench top, and while wearing gloves, place the bearingFIG. 3 Run-in Stand DrawingFIG. 4 Spindle/Thrust Loading DeviceD5969 1114c
36、up with the small diameter face down into the recess of thepacker. Place the bearing cone over the cut, and while holdingthe bearing assembly against the packer, lift and invert thewhole unit and return it to the bench.10.2 Fill the reservoir with the grease sample, and use theplunger to force greas
37、e 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 assembly in the packer, invert theunit to its original position on the bench.10.3 Using a small square-ended spat
38、ula, 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 the use of thepliers4or by placing a gloved index finger in the bore andlifting it out.10.3.1 While holding the bearing, use
39、 the spatula to removeexcess grease 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, hold the packed bearingbetween gloved fingers with the large inside diameter of thecup downward
40、 and insert the small diameter plastic flange ontop of the bore, and the larger flange into the bottom of thebore. Slide the bearing assembly onto the 1-kg weight so thatthe large diameter flange fits into the recess on top of theweight. Insert the bolt through the assembly and screw the bolttightly
41、 into the weight. Lower the plastic bearing holder (Part8) over the bearing. (The large O-ring faces upward.) Pressdown the holder so that the bearing fits squarely into the holder.10.5 Invert a plastic jar over the bearing assembly. Slide thetwo components over the edge of the bench, and with finge
42、rspressing the weight 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. After the pin isengaged, start the motor and bring the drive into the center ofthe 1-kg weight. Load until
43、the nut hits the depth stop. Run for60 6 3 s and allow the bearing to coast to a stop. Hold it withtwo fingers and then raise the drive. Take extreme care not tobreak the contact between the races and rollers at this point andin the following steps.NOTE 3At no time during or after the 60-s run shall
44、 the grease beredistributed or forced back into the bearing.10.7 Using synthetic sea water (Warningsee 7.6) pre-pared as in Test Method D665, make a dilution with distilledwater (by volume, at the desired concentration) to obtain theproper test solution. The synthetic sea water should be no morethan
45、 one week old.10.8 Fill a clean syringe with 100 6 5 mL of the freshlyprepared synthetic sea water test solution. With the run-inbearing in the jar, simultaneously start a timer and begin addingthe synthetic sea water solution into the hole provided for thispurpose in the bearing holder. Add the 100
46、 mL of the solutionwithin 20 6 3 s. When the timer shows 50 6 3 s, startwithdrawing the solution. By 60 6 3 s, complete the with-drawal of 70 6 5 mL of the solution. Leave the remaining 306 5 mL of the solution in the jar. Make sure that water does nottouch the bearing after 70 6 5 mL is withdrawn.
47、It may beFIG. 5 Bearing Packer Brass(Tolerances are 0.003 in. unless otherwise specified)D5969 1115difficult to withdraw 70 6 5 mL of water in 10 seconds usinga 16 gauge needle. A larger needle may be required.10.9 Screw the cap on the jar and transfer to a dark ovenessentially free from vibration f
48、or 24 h at 52 6 1C.NOTE 4Test Method D1743 calls for 48 h at 52 6 1C.10.10 Prepare three bearings for each grease sample to betested at the percentage of dilute synthetic sea water of interest.Each group of three bearings is one test. See Table 1 forconversion.11. Rating Procedure11.1 Remove the bea
49、ring from the test jar and place thebearing cup in a 50/50 mixture by volume of isopropyl alcohol(Warningsee 7.3 and 7.5) and mineral spirits, reagent grade(WarningCombustible. Vapor harmful). The solvent mix-ture can be heated to facilitate the removal of the grease.Agitate vigorously to remove the grease. Repeat the rinsingusing fresh solvent mixture or gently wipe the bearing with aclean cloth or tissue to ensure that traces of grease areremoved.KEY DESCRIPTION QUANTITY1 GREASE PACK PLUNGER 12 CYLINDER 13 LM11900 BEARING ASSEMBLY 14
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