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August2003MetalbondingSN507TableofcontentsPage1General.......................................................................................................................................................................11.1Single-componentadhesives....................................................................................................................................11.2Two-componentadhesives.......................................................................................................................................11.3Singleandtwo-componentadhesives.......................................................................................................................12Drawingindications....................................................................................................................................................12.1Requireddesignfeatures..........................................................................................................................................13AdhesivesandcleaningagentsusedbySMSDemag...............................................................................................23.1Single-componentadhesive......................................................................................................................................23.2Two-componentadhesive.........................................................................................................................................23.3Surfacepreparation(cleaning)..................................................................................................................................24Applicationexamples.................................................................................................................................................34.1Transmissionoftorques...........................................................................................................................................34.2Bondingofplates.....................................................................................................................................................44.3Lockingofscrews.....................................................................................................................................................44.4Sealingofpipecouplingsandthreadedfittings..........................................................................................................45Instructionsforprocessing........................................................................................................................................55.1Conditionofthesurface............................................................................................................................................55.2Cleaning,degreasing................................................................................................................................................55.3Applyingofsingle-componentadhesive.....................................................................................................................55.4Applyingoftwo-componentadhesive........................................................................................................................55.5Storage....................................................................................................................................................................65.6Markingofjoinedparts.............................................................................................................................................66Calculations................................................................................................................................................................61General1.1Single-componentadhesivesSingle-componentadhesivesremaininliquidstateaslongastheyareincontactwithair(oxygen).Whenoutofaircontact,theyhardentoformatough-hardfilm,providedthereiscontactwithmetalrequiredascatalyst(substancewhichtriggersareactionordeterminesitscourse).1.2Two-componentadhesivesTwo-componentadhesivesaremixedpriortotheirapplication.Thetimebetweenthemixingandthegellingoftheadhesiveistheso-calledpotlife,thetimeduringwhichthemixturemustbeprocessed.Astothemixingandthepotlifeoftheadhesives,thedatagivenbythemakersmustbeobserved.Thepotlifedependsonthevolumeofadhesiveprepared,thequantityofhardeningagentandthetemperatureofthemixture.Ingeneral,extensionofthepotlifeispossiblebycoolingthemixture.Itmustbeborneinmindthat,duetothereactionheat,itisnottheambienttemperature,butthetemperatureofthemixtureitself,whichinfluencesthepotlife.1.3Singleandtwo-componentadhesivesThetransformationfromtheliquidtothesolidstatetakesplacewithoutmeasurablelossofmaterialofthesingleortwo-componentadhesives.Theadhesivesticksintheroughnessvalleysofthepartstobejoinedandthusestablishesthefastening,securingorsealingofmetallicparts.Theresultingform-fittingjointisshockandvibration-proofandcapableofwithstandingshear