Designation:D2651−01(Reapproved2016)StandardGuideforPreparationofMetalSurfacesforAdhesiveBonding1ThisstandardisissuedunderthefixeddesignationD2651;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.INTRODUCTIONItisimpossibleandimpracticaltopresentasinglesurface-preparationmethodforametalgroup,suchasaluminumalloys,stainlesssteels,magnesiumalloys,etc.Thewidevarietyofindividualalloysandheattreatmentsundereachgroup,thefactthatcertainadhesivesexhibitspecificcompatibilitieswithsurfacepreparationandthecomplexityandnatureofpartsbeingbondedprecludetheuseofanall-inclusiveprocedureforametalgroup.Proceduresforaluminumalloysarewellstandardized,possiblybecausemorebondinghasbeendonewiththesealloys.Preliminarytestsshouldbeconductedwiththespecificadhesiveandtheexactlotofmetalstodetermineperformance.Thisisespeciallytrueforstainlesssteel.Theadhesivemanufacturers’recommendationshouldalsobeconsidered.1.Scope1.1Thisguidecoversproceduresthathaveprovedsatisfac-toryforpreparingvariouswroughtmetalsurfacesforadhesivebonding.Itdoesnotaddressthepreparationofcastmetals.1.2Surfacepreparationmethodsareincludedfor:MetalSectionAluminumAlloys7StainlessSteel8CarbonSteel9TitaniumAlloys10MagnesiumAlloysCopperandCopperAlloys11121.3Proceduresincludedhereinarebasedonthecommercialpracticeofnumerousagenciesandorganizations.Themethodsmayberevisedorsupplemented,asnecessary,toincludemethodsbasedonprovenperformance.1.4Thesurfacepreparationofmetalsystemsusedforqualificationandqualitycontroltestingoftheadhesiveshouldbeagreeduponbybothmanufactureranduser.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwith...
