1、Designation: D 896 04Standard Practice forResistance of Adhesive Bonds to Chemical Reagents1This standard is issued under the fixed designation D 896; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A num
2、ber in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) 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 Method Standard
3、 No. 175a1. 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 strength using existing standard methodsafter exposure.1.2 This standard does not purpo
4、rt 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. For specificwarnings, see Section 8.1.3 The va
5、lues stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.2. Referenced Documents2.1 ASTM Standards:2B 117 Practice for Operating Salt Spray (Fog) ApparatusD 471 Test Method for Rubber PropertyEffect of LiquidsD 543 Test Method for Resistance
6、of Plastics to ChemicalReagentsD 907 Terminology of AdhesivesD 1002 Test Method for Apparent Shear Strength of Single-Lap-Joint Adhesively Bonded Metal Specimens by Ten-sion Loading (Metal-to-Metal)D 1151 Test Method for Effect of Moisture and Temperatureon Adhesive BondsD 3164 Test Method for Stren
7、gth Properties of AdhesivelyBonded Plastic Lap-Shear Sandwich Joints in Shear byTension Loading3. Terminology3.1 DefinitionsMany terms in this practice are defined inTerminology D 907.4. Summary of Practice4.1 Specimens are immersed in selected reagents for aspecified time and temperature. The speci
8、mens are recovered,dried, and tested in accordance with selected methods, such asTest Methods D 1002 or D 3164.5. Significance and Use5.1 This practice is designed to determine the general effectsof chemical reagents on the strength of the bonded system. Itcannot distinguish between adsorption in th
9、e 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 apparatus is required for immersingspecimens above and below room temperature.NOTE
10、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 in themethod for the property to be measured.7. Reagents7.1 Directions for prep
11、arations 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 Test Method D 543. Standard oils and fuels areselected from the list given in Test Method D 471.7.3 Distilled WaterFreshly prepared distilled wa
12、ter isused wherever water is specified in this practice.8. Supplementary Reagents (see 7.1)8.1 Hydrocarbon Mixture No. 1:Isooctane (2,4-trimethylpentane) 600 mL1This practice is under the jurisdiction of ASTM Committee D14 on Adhesivesand is the direct responsibility of Subcommittee D14.80 on Metal
13、BondingAdhesives.Current edition approved April 1, 2004. Published April 2004. Originallyapproved in 1946. Last previous edition approved in 1997 as D 896 97.2For 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.Toluene 200 mLXylene 150 mL8.2 Standard Jet Fuel No. 1:Toluene 300 mLCyclohexane 600 mLI
15、sooctane (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 mLIsooctane (2,4-trimethylpentane) 100 mLn-Butyl disulfide 1 mLn-Butyl mercaptan (equivalent to 0.004 0.01
16、0 gweight % of mercaptan sulfur)8.4 Silicone Fluid (Polydimethysiloxane), having a viscosityof 200 cSt (mm2/s) at 25C.8.5 Engine Antifreeze (Ethylene Glycol), (inhibited).8.6 n-Butyl Alcohol (Butanol-1).8.7 Brake Fluid.8.8 Automotive Power Steering Fluid.(WarningThesupplemental reagents may be toxic
17、 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 required inASTM test methods for the strength properties to be measured,and the conditioning period before expo
18、sure 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 specimen in a separate container and totallyimmerse in a sufficient quantity of the reagent for seven days
19、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 container. Stir the reagent every 24 h by moderatemanual rotation of the container. Maintain the strength of
20、thechemical solutions constant. Use completely closed containersto minimize outgassing or any change in concentration (forexample, due to hygroscopicity). Where the reagent-specimencombination may result in vaporizing or outgassing, select thecontainer to withstand the pressure resulting from the te
21、sttemperature 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 immersiontime is permissible upon agreement between the purchaser and themanufacturer. The alternative test temperature
22、may be selected from thetable in Test Method D 1151.10.2 A short time test is permissible for the purpose ofeliminating those materials that are unsuitable or undulyaffected by the reagents, performed on films or suitablespecimens of the adhesive prepared in accordance with themanufacturers instruct
23、ions 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 organic solvent. Blotthe specimen dry with a clean dry cloth or blotting paper.Determine the strength o
24、f 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 and 50 6 5 % relative humidity duringthe same seven days that the test specimens are exposed to thechemi
25、cal 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 an alternative temperature is selected forexposure of test specimens (see Note 3 and Note 5), hold thec
26、ontrol 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 spray (fog) testing. UseTest Method B 117.NOTE 5Selection of an alternative temperature for determining
27、thestrength of the specimen is permissible upon agreement between thepurchaser and the manufacturer. The alternative temperature is selectedfrom the table in Test Method D 1151.11. Report11.1 Report the following information:11.1.1 The individual and average strength property valuesof the control sp
28、ecimens 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:11.1.2.1 Immersion time and temperature,11.1.2.2 Strength property value of each specimen andtemperatu
29、re 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 specimens as100 %,11.1.2.4 General appearance and behavior of each specimenduring and after immers
30、ion,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 inpreparing the specimens.12. Precision and Bias12.1 This is a comparative test of adhesive strength aft
31、erexposure. Precision and bias is a function of the test methodsselected. No precision and bias are needed.D89604213. Keywords13.1 absorption; adhesive bonds; chemical; compatibility;exposure; reagents; resistanceASTM International takes no position respecting the validity of any patent rights asser
32、ted 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 responsibility.This standard is subject to revision at any time by
33、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 addressed to ASTM International Headquarters. Your comments will receiv
34、e 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 the address shown below.This standard is copyrighted by ASTM Intern
35、ational, 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).D896043
