1、Designation: D896 04 (Reapproved 2017)Standard 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 last
2、 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.This practice replaces Method 2011.1 of Federal
3、Test Method Standard No. 175a.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 strength using existing standard methodsafter exposure.1.2 The val
4、ues 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 theresponsibility of the user of this standard to establish appro-priate s
5、afety, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.For specific warnings, see Section 8.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decis
6、ion on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2B117 Practice for Operating Salt Spray (Fog) ApparatusD471 Test Method for Rubber
7、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 for Effect of Moist
8、ure 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 Specimens are immersed in se
9、lected 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 the strength of the
10、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 apparatus is required f
11、or 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 in themethod for th
12、e 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 list given in Test Meth
13、od D471.1This practice is under the jurisdiction of ASTM Committee D14 on Adhesivesand is the direct responsibility of Subcommittee D14.80 on Metal BondingAdhesives.Current edition approved Nov. 1, 2017. Published November 2017. Originallyapproved in 1946. Last previous edition approved in 2010 as D
14、896 04 (2010)1.DOI: 10.1520/D0896-04R17.2For 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.Copyright ASTM Intern
15、ational, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, G
16、uides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1Mon Apr 30 30 7.3 Distilled WaterFreshly prepared distilled water is usedwherever water is specified in this practice.8. Supplementary Reagents (see 7.1)8.1 Hydrocarbon Mixture No. 1:Isoocta
17、ne (2,4-trimethylpentane) 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 mLCy
18、clohexane 600 mLIsooctane (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
19、-Butyl Alcohol (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 identic
20、al with those required 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. Procedu
21、re10.1 Place each 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
22、side wallof the container. 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-sp
23、ecimencombination 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
24、 and immersiontime 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 th
25、e reagents, performed 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 reagent
26、s with a suitable 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 controlspec
27、imens at 23 6 3C 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 controlstr
28、ength.10.4.1 When 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 s
29、ubjected to salt 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. Rep
30、ort11.1 Report the 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-men
31、tary reagents:11.1.2.1 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 valu
32、e of control test 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 cond
33、itions used inpreparing the specimens.D896 04 (2017)2Mon Apr 30 30 12. 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; che
34、mical; compatibility;exposure; 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 righ
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38、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:/ 04 (2017)3Mon Apr 30 30
