1、Designation: D896 04 (Reapproved 2010)1Standard Practice forResistance of Adhesive Bonds to Chemical Reagents1This standard is issued under the fixed designation D896; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of las
2、t 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. This practice replaces Method 2011.1 of FederalTest
3、 Method Standard No. 175a1NOTEEditorial corrections were made throughout in October 2010.1. Scope1.1 This practice provides a uniform procedure for theexposure of adhesively bonded substrates to selected environ-ments. This practice also provides for a qualitative measure ofthe adhesive bond strengt
4、h using existing standard methodsafter exposure.1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibili
5、ty 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. For specificwarnings, see Section 8.2. Referenced Documents2.1 ASTM Standards:2B117 Practice for Operating Salt Spray (Fog) ApparatusD471 Tes
6、t Method for Rubber PropertyEffect of LiquidsD543 Practices for Evaluating the Resistance of Plastics toChemical ReagentsD907 Terminology of AdhesivesD1002 Test Method for Apparent Shear Strength of Single-Lap-Joint Adhesively Bonded Metal Specimens by Ten-sion Loading (Metal-to-Metal)D1151 Practice
7、 for Effect of Moisture and Temperature onAdhesive BondsD3164 Test Method for Strength Properties of AdhesivelyBonded Plastic Lap-Shear Sandwich Joints in Shear byTension Loading3. Terminology3.1 DefinitionsMany terms in this practice are defined inTerminology D907.4. Summary of Practice4.1 Specimen
8、s are immersed in selected reagents for aspecified time and temperature. The specimens are recovered,dried, and tested in accordance with selected methods, such asTest Methods D1002 or D3164.5. Significance and Use5.1 This practice is designed to determine the general effectsof chemical reagents on
9、the strength of the bonded system. Itcannot distinguish between adsorption in the bulk adhesive orpenetration at the adhesive/substrate interface.6. Apparatus6.1 The apparatus consists of containers for test specimensand a cabinet for maintaining a temperature of 23 6 3C (73 65F). Other suitable app
10、aratus is required for immersingspecimens above and below room temperature.NOTE 1Exercise care in the choice of materials with respect toadherend and containers. Confirm that they are unaffected by the chemi-cals and solvents used in this practice.6.2 Apparatus for making strength tests is specified
11、 in themethod for the property to be measured.7. Reagents7.1 Directions for preparations of reagents are for approxi-mately 1-L quantities. All percentages are by weight.7.2 Standard chemical reagents are selected from the listgiven in Practices D543. Standard oils and fuels are selectedfrom the lis
12、t given in Test Method D471.7.3 Distilled WaterFreshly prepared distilled water isused wherever water is specified in this practice.1This practice is under the jurisdiction of ASTM Committee D14 on Adhesivesand is the direct responsibility of Subcommittee D14.80 on Metal BondingAdhesives.Current edi
13、tion approved Oct. 1, 2010. Published October 2010. Originallyapproved in 1946. Last previous edition approved in 2004 as D896 04. DOI:10.1520/D0896-04R10E01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of A
14、STMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.8. Supplementary Reagents (see 7.1)8.1 Hydrocarbon Mixture No. 1:Isooctane (2,4-trimethy
15、lpentane) 600 mLToluene 200 mLXylene 150 mL8.2 Standard Jet Fuel No. 1:Toluene 300 mLCyclohexane 600 mLIsooctane (2,4-trimethylpentane) 100 mLn-Butyl disulfide 10 mLn-Butyl mercaptan (equivalent to 0.005 0.125 gweight % of mercaptan sulfur)8.3 Standard Jet Fuel No. 2:Toluene 300 mLCyclohexane 600 mL
16、Isooctane (2,4-trimethylpentane) 100 mLn-Butyl disulfide 1 mLn-Butyl mercaptan (equivalent to 0.004 0.010 gweight % of mercaptan sulfur)8.4 Silicone Fluid (Polydimethysiloxane), having a viscosityof 200 mm2/s (200 cSt) at 25C.8.5 Engine Antifreeze (Ethylene Glycol), (inhibited).8.6 n-Butyl Alcohol (
17、Butanol-1).8.7 Brake Fluid.8.8 Automotive Power Steering Fluid.(WarningThesupplemental reagents may be toxic or flammable.)NOTE 2Reagent substitution is acceptable provided such reagents arewithin the general scope of this practice.9. Test Specimens9.1 The test specimens are identical with those req
18、uired inASTM test methods for the strength properties to be measured,and the conditioning period before exposure corresponds to theconditioning period before testing as given in the specifiedASTM test method.9.2 Select matched specimens for control and exposuretreatments.10. Procedure10.1 Place each
19、 specimen in a separate container and totallyimmerse in a sufficient quantity of the reagent for seven days ata temperature of 23 6 3C (73 6 5F) (Note 3). Place thespecimen on edge in the container in the case of flat specimensso that it is supported at an angle from the bottom and side wallof the c
20、ontainer. Stir the reagent every 24 h by moderatemanual rotation of the container. Maintain the strength of thechemical solutions constant. Use completely closed containersto minimize outgassing or any change in concentration (forexample, due to hygroscopicity). Where the reagent-specimencombination
21、 may result in vaporizing or outgassing, select thecontainer to withstand the pressure resulting from the testtemperature so that the test reagent stays liquid.10.1.1 The volume of reagent used is ten times the volumeof the specimen.NOTE 3Selection of an alternative test temperature and immersiontim
22、e is permissible upon agreement between the purchaser and themanufacturer. The alternative test temperature may be selected from thetable in Practice D1151.10.2 A short time test is permissible for the purpose ofeliminating those materials that are unsuitable or undulyaffected by the reagents, perfo
23、rmed on films or suitablespecimens of the adhesive prepared in accordance with themanufacturers instructions with regard to drying time, cure,etc.10.3 Remove the individual specimen from the reagent.Rinse aqueous reagents off the specimen with distilled water.Rinse off other reagents with a suitable
24、 organic solvent. Blotthe specimen dry with a clean dry cloth or blotting paper.Determine the strength of the specimen immediately at atemperature of 23 6 3C (73 6 5F) in accordance with thespecified method (see Note 5).10.4 Using air as the contact medium, condition the controlspecimens at 23 6 3C
25、and 50 6 5 % relative humidity duringthe same seven days that the test specimens are exposed to thechemical treatment. Determine the strength of the controlspecimens, testing in accordance with the specified method andat a temperature of 23 6 3C, and calculate the average controlstrength.10.4.1 When
26、 an alternative temperature is selected forexposure of test specimens (see Note 3 and Note 5), hold thecontrol specimens in a closed container for the seven-dayperiod at the same temperature as the test specimens. Returnthe controls to 23 6 3C before testing.NOTE 4Adhesives may be subjected to salt
27、spray (fog) testing. UseTest Method B117.NOTE 5Selection of an alternative temperature for determining thestrength of the specimen is permissible upon agreement between thepurchaser and the manufacturer. The alternative temperature is selectedfrom the table in Practice D1151.11. Report11.1 Report th
28、e following information:11.1.1 The individual and average strength property valuesof the control specimens and the temperature at which thevalues were determined.11.1.2 Report the following information for each adhesivetested in all the standard reagents and any specified supple-mentary reagents:11.
29、1.2.1 Immersion time and temperature,11.1.2.2 Strength property value of each specimen andtemperature at which value was determined,11.1.2.3 Percentage change in average strength resultingfrom the immersion test, calculated to the nearest 1 % takingthe average strength property value of control test
30、 specimens as100 %,11.1.2.4 General appearance and behavior of each specimenduring and after immersion,11.1.2.5 Type of specimen,11.1.2.6 Trade name and type of adhesive used,11.1.2.7 ASTM designation of materials and test methodused, and11.1.2.8 Application, drying, and curing conditions used inpre
31、paring the specimens.D896 04 (2010)1212. Precision and Bias12.1 This is a comparative test of adhesive strength afterexposure. Precision and bias is a function of the test methodsselected. No precision and bias are needed.13. Keywords13.1 absorption; adhesive bonds; chemical; compatibility;exposure;
32、 reagents; resistanceASTM 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 the validity of any such patent rights, and the riskof infringemen
33、t 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. Your comments are invited either for revision of this standard or f
34、or 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 have not received a fair hearing you shouldmake your views know
35、n 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 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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D896 04 (2010)13
