1、Designation: D2511 93 (Reapproved 2014)Standard Test Method forThermal Shock Sensitivity of Solid Film Lubricants1This standard is issued under the fixed designation D2511; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year o
2、f 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 method covers the me
3、asurement 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 not purport to address all
4、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 Standards:2A167 Specification for
5、 Stainless and Heat-ResistingChromium-Nickel Steel Plate, Sheet, and Strip (With-drawn 2014)3D2510 Test Method for Adhesion of Solid Film LubricantsD4175 Terminology Relating to Petroleum, PetroleumProducts, and Lubricants2.2 U.S. Federal Specification:P-D-680 Dry Cleaning Solvent43. Terminology3.1
6、Definitions:3.1.1 lubricant, nany material interposed between twosurfaces that reduces the friction or wear between them (seeTerminology D4175).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 bonded in
7、 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 evidence
8、 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 duringsliding moti
9、on.6. Apparatus6.1 Oven, capable of maintaining a temperature at260 6 5.5C (500 6 10F) and 149 6 5.5C (300 6 10F)(forced circulation).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.) with a 1-b
10、all 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 SpecificationA167, No. 2D finish, condition annealed. Type 321 has provedsatisfactory and is generally available.7.2 Dry Cleaning Solvent, conforming to U. S. F
11、ederalSpecification 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 jurisdicti
12、on of ASTM Committee D02 onPetroleum Products, Liquid Fuels, and Lubricants and is the direct responsibility ofSubcommittee D02.L0.05 on Solid Lubricants.Current edition approved May 1, 2014. Published July 2014. Originally approvedin 1966. Last previous edition approved in 2009 as D251193(2009). DO
13、I:10.1520/D2511-93R14.2For 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.3The last approved version of this hist
14、orical standard is referenced onwww.astm.org.4Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States18.1.2 Apply so
15、lid film lubricant to one surface of the testpanel by spraying, or an equivalent technique, to produce a dryfilm 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 n
16、ot provided, cure the film by air drying for6hat26.76 3C (80 6 5F) or by air drying for 30 min at 26.7C (80F)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 i
17、n the oven for a period of 3 h.9.2 After3hat2606 5.5C (500 6 10F), place the panelsdirectly into the sub-zero 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 visu
18、ally. It may be necessary to testsome coatings under nonstandard conditions for special appli-cations (that 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
19、 test given in Procedure B for Silicate or PhosphoricAcid-Bonded Coatings in Test Method D2510.10. Report10.1 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 (perce
20、nt of surface area), and10.1.3 Any deviations from standard procedure such asspecial temperature or times of 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 int
21、ended to give a pass/fail rating.12. Keywords12.1 solid film lubricant; thermal shockASTM International takes 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 th
22、e validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.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. You
23、r comments are invited either for revision of this standard or for additional standardsand should be addressed 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
24、 have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the 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 mult
25、iple 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). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 93 (2014)2
