1、Designation: D 2511 93 (Reapproved 2009)An American National StandardStandard Test Method forThermal Shock Sensitivity of Solid Film Lubricants1This standard is issued under the fixed designation D 2511; the number immediately following the designation indicates the year oforiginal adoption or, in t
2、he 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.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This
3、 test method covers the measurement of the resis-tance of dry solid film lubricants to deterioration when sub-jected to temperature extremes.1.2 The values stated in SI units are to be regarded as thestandard. The inch-pound units given in parentheses are forinformation only.1.3 This standard does n
4、ot 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 and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standar
5、ds:2A 167 Specification for Stainless and Heat-ResistingChromium-Nickel Steel Plate, Sheet, and StripD 2510 Test Method for Adhesion of Solid Film LubricantsD 4175 Terminology Relating to Petroleum, PetroleumProducts, and Lubricants2.2 U.S. Federal Specification:P-D-680 Dry Cleaning Solvent33. Termi
6、nology3.1 Definitions:3.1.1 lubricant, nany material interposed between twosurfaces that reduces the friction or wear between them (seeTerminology 4175).3.2 Definitions of Terms Specific to This Standard:3.2.1 dry solid film lubricant, non a steel surface, oneconsisting of friction-reducing powders
7、bonded in tight matrixto the surface of the metal.4. Summary of Test Method4.1 A steel panel having the solid film lubricant depositedon one surface is subjected to 260C (500F) heat followed byimmediate exposure to 54C (65F). The solid film is thenexamined for cracking, flaking, blistering, or other
8、 evidence ofthermal instability.5. Significance and Use5.1 Solid lubricant coatings are applied to surfaces that areexposed to heat and cold to such a degree that in many casesliquid lubricants are not practical. Adherence under theseconditions is mandatory to preserve the bearing surfaces duringsli
9、ding motion.6. Apparatus6.1 Oven, capable of maintaining a temperature at 260 65.5C (500 6 10F) and 149 6 5.5C (300 6 10F) (forcedcirculation).6.2 Sub-Zero Cabinet, capable of maintaining a constanttemperature of 54 6 0.5C (65 6 1F).6.3 Micrometer, reading 0 to 25 6 0.0025 mm, (0 to 1 60.0001 in.) w
10、ith a 1-ball anvil.7. Reagents and Materials7.1 Test Panels, of corrosion-resistant steel, 76 by 152 by0.914 mm (3 by 6 by 0.036 in.), conforming to SpecificationA 167, No. 2D finish, condition annealed. Type 321 has provedsatisfactory and is generally available.7.2 Dry Cleaning Solvent, conforming
11、to U. S. FederalSpecification P-D-680.8. Sampling, Test Specimens, and Test Units8.1 Have a sufficient quantity of solid film mixture toperform test. Prepare the test panels as follows:8.1.1 Liquid-degrease the test panels in P-D-680 dry clean-ing solvent and dry them.1This test method is under the
12、jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.L0.05 on Solid Lubricants.Current edition approved April 15, 2009. Published July 2009. Originallyapproved in 1966. Last previous edition approved in 2003 as D 251193 (2003).2Fo
13、r 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 Document Summary page onthe ASTM website.3Available from Standardization Documents Order Desk, DODSSP, Bl
14、dg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.8.1.2 Apply solid film lubricant to one surface of the testpanel by spraying, or an equivalent technique, to produce a dry
15、film thickness of 0.005 to 0.013 mm (0.0002 to 0.0005 in.).8.1.3 In most cases, curing shall be carried out according tothe particular manufacturers specifications. If such instruc-tions are not provided, cure the film by air drying for6hat26.76 3C (80 6 5F) or by air drying for 30 min at 26.7C (80F
16、)followed by1hinanair-circulating oven at 148.9C (300F).8.1.4 Measure the dry film thickness using a micrometer.9. Procedure9.1 Preheat the oven to 260 6 5.5C (500 6 10F) andplace the panels in the oven for a period of 3 h.9.2 After3hat2606 5.5C (500 6 10F), place the panelsdirectly into the sub-zer
17、o cabinet at a temperature of 54 60.5C (65 6 5F). Allow the panels to remain at 54C(65F) for 3 h.9.3 Remove the test panels and allow them to reach roomtemperature.9.4 Examine the coating visually. It may be necessary to testsome coatings under nonstandard conditions for special appli-cations (that
18、is, plunging into liquid oxygen after removal fromthe oven). All such deviations should be noted in the report.NOTE 1If no damage is evident, the coating shall be further tested bythe adhesion test given in Procedure B for Silicate or PhosphoricAcid-Bonded Coatings in Test Method D 2510.10. Report10
19、.1 The report shall include the following:10.1.1 Conditions of application and curing of the coating,10.1.2 The degree of blistering, flaking, cracking or soften-ing of the film, or both (percent of surface area), and10.1.3 Any deviations from standard procedure such asspecial temperature or times o
20、f thermal exposure.11. Precision and Bias11.1 It is not practicable to specify the precision and bias ofthis test method on thermal shock sensitivity because theresults of the test are only intended to give a pass/fail rating.12. Keywords12.1 solid film lubricant; thermal shockASTM International tak
21、es no position respecting the validity of 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 re
22、sponsibility.This standard is subject to 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 addres
23、sed to ASTM International Headquarters. 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 th
24、e address shown below.This standard is copyrighted 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).D 2511 93 (2009)2
