ASTM_D_896_-_04_2017.pdf

Designation:D89604(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 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 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 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 theresponsibility of the user of this standard to establish appro-priate safety,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 Decision 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 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 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 Specimens 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 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 apparatus is required for immersingspecimens above and below room temperature.NOTE1Exercise 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 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 Method 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 D896 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 International,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,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 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:Isooctane(2,4-trimethylpentane)600 mLToluene200 mLXylene150 mL8.2 Standard Jet Fuel No.1:Toluene300 mLCyclohexane600 mLIsooctane(2,4-trimethylpentane)100 mLn-Butyl disulfide10 mLn-Butyl mercaptan(equivalent to 0.0050.125 gweight%of mercaptan sulfur)8.3 Standard Jet Fuel No.2:Toluene300