2023年全國碩士研究生考試考研英語一試題真題（含答案詳解+作文范文）_第1頁
已閱讀1頁，還剩2頁未讀， 繼續(xù)免費(fèi)閱讀

下載本文檔

版權(quán)說明：本文檔由用戶提供并上傳，收益歸屬內(nèi)容提供方，若內(nèi)容存在侵權(quán)，請進(jìn)行舉報或認(rèn)領(lǐng)

文檔簡介

1、Designation:D1730?09(Reapproved2014)StardPracticesfPreparationofAluminumAluminumAlloySurfacesfPainting1ThisstardisissuedunderthefixeddesignationD1730thenumberimmediatelyfollowingthedesignationindicatestheyearofiginaladop

2、tioninthecaseofrevisiontheyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.ThisstardhasbeenapprovedfusebyagenciesoftheU.S.Depar

3、tmentofDefense.1.Scope1.1Thesepracticescoverfourtypesoftreatmentfpreparationofaluminumaluminumalloysurfacesfpaintingasfollows:1.1.1TypeA—SolventCleaning.1.1.2TypeB—ChemicalTreatments.1.1.3TypeC—AnodicTreatments.1.1.4Type

4、D—MechanicalTreatments.Thesefourtypescoveranumberofproceduresasdescribedherein.1.2Variationsinsurfacetreatmentproduceendconditionswhichdifferwhichdonotnecessarilyyieldidenticalresultswhenpaintsareapplied.Servicecondition

5、swilldictatethetypeofsurfacepreparationthatshouldbeedalthoughthequalityproducedbyanyindividualmethodmayvarywithdifferentalloys.1.3Thisstardmayinvolvehazardousmaterialsoperationsequipment.Thisstarddoesnotpurpttoaddressall

6、ofthesafetyconcernsifanyassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstardtoestablishappropriatesafetyhealthpracticesdeterminetheapplicabilityofregulatylimitationspritouse.2.ReferencedDocuments2.1ASTMStards:2

7、D609PracticefPreparationofColdRolledSteelPanelsfTestingPaintVarnishConversionCoatingsRelatedCoatingProducts2.2MilitaryStards:3MILA8625AnodicCoatingsfAluminumAluminumAlloysMILDTL5541ChemicalConversionCoatingsonAluminumAlu

8、minumAlloysMILM10578BMetalConditionerRustRemover(PhosphicAcidType)MILP15328bBCoatingCompound–MetalPretreatmentResinResistant2.3FederalSpecification:3TTC490ChemicalConversionCoatingsPretreatmentsfFerrousSurfaces(Basefgani

9、cCoatings)3.TypeA—SolventCleaning3.1Solventcleaningdoesnotdisturbthenaturaloxidefilmonthemetalmayproveadequatefsomeapplicationssuchasambientindoverymildserviceconditions.Threemethodsmaybeemployedasfollows:3.1.1Method1Man

10、ualSwabbingDipWashingwithasolventsuchasmineralspiritshighflasksolventnaphtha.Withthismethoditisextremelydifficulttopreventaccumulationofcontaminantsontheswabinthesolvent.Thismethodisonlyrecommendedwhenothertreatmentsarei

11、mpractical.3.1.2Method2SolventSprayCleaninginaccdancewithMethodAProcedure1ofPracticeD609.3.1.3Method3VapDegreasinginspecialequipmentemployingtrichloethylenevapinaccdancewithMethodAProcedure2ofPracticeD609.4.TypeB—Chemica

12、lTreatmentsNOTE1—Materialsproceduresemployedinthesemethodsoftreatmentareavailablefromanumberofsourcesasproprietarycompoundsmethods.ionmaybemadefromavailablesources.Thehexavalentchromiummethodsgivenarenotrecommendedashexa

13、valentchromiumisaknowncarcinogen.4.1Method1AlkalineCleaners—Alkalinesolutionssuchascausticsodaetchthemetalthusdestroyingthenaturaloxidefilm.Theyarefollowedbyanacidtreatmentpreferablynitricacidphosphicacid.Theyshallnotbeu

14、sedonassembledstructures.Inhibitedalkalinecleanersaresometimesemployedasapretreatmenttoremovegreaseoilpritoanacidtreatment.Inhibitedalkalinecleanersdonotetchthe1ThesepracticesareunderthejurisdictionofASTMCommitteeB08onMe

15、tallicInganicCoatingsisthedirectresponsibilityofB08.07ConversionCoatingsonChromateConversionCoatings.CurrenteditionapprovedNov.12014.PublishedNovember2014.iginallyapprovedin1960.Lastpreviouseditionapprovedin2009asD173009

16、.DOI:10.1520D173009R14.2FreferencedASTMstardsvisittheASTMwebsitewww.astm.gcontactASTMCustomerServiceat.FAnnualBookofASTMStardsvolumeinfmationrefertothestard’sDocumentSummarypageontheASTMwebsite.3AvailablefromStardization

17、DocumentsderDeskDODSSPBldg.4SectionD700RobbinsAve.PhiladelphiaPA191115098Copyright?ASTMInternational100BarrHarbDrivePOBoxC700WestConshohockenPA194282959.UnitedStates1Anodictreatmentsshouldnotbeusedonassembliesofdissimila

18、rmetals.Thetwoproceduresareasfollows:NOTE7—TreatmentsconfmingtoMethods12ofTypeCcomplywiththerequirementsofU.S.MilitarySpecificationMILA8625.5.2Method1SulfuricAcidAnodic—Thistreatmentconsistsinmakingtheparttheanodeina15%s

19、ulfuricacidelectrolyte(byweight)applyingcurrentatapotentialofabout16to18Vacurrentdensityof12Aft2untildesiredthicknessofcoatingisobtained.Afterrinsingincoldwaterthecoatingissealedf10minbytreatmentinaboilingsolutionof5%pot

20、assiumdichromate.Thismethodisnotrecommendedwheredangerofacidentrapmentisencountered.5.3Method2ChromiumTrioxideAnodic—Thistreatmentconsistsinmakingtheparttheanodeina10weight%chromiumtrioxideelectrolyteatatemperatureof100F

21、(38C)applyingapotentialof40Vfaperiodof30to60min.Afterfirstrinsingincoldwaterthecoatingisfinallyrinsedinwaterat150F(66C)minimumdriedanoptionalfinalsealingtreatmenttoobtainmaximumprotectionisobtainedbyimmersioninasolutionc

22、ontaining0.01gchromiumtrioxideperlitreofwater(0.00131gal)atatemperatureof208to212F(98to100C)f5min.6.TypeD—MechanicalTreatments6.1Method1HPowerWireBrushingotherabrasivetreatment.Wirebrushingeitherbyhpowerroughensthesurfac

23、eofthemetalmechanicallyimprovestheanchagefsuperimposedpaintfilms.Thedisadvantagesarethatthenaturaloxidefilmonthemetalisdisruptedoilgreasefilmsotherfeignmatterarenotcompletelyremoved.6.2Method2Sblastingwhereemployedonalum

24、inumitsalloysmustbecarriedoutatrelativelylowpressureswithafinesilicas.Itroughensthesurfacemechanicallyimprovestheanchagefpaintfilmsbutdestroysthenaturaloxidefilmonthemetal.Whereuseditshouldbefollowedbyaninhibitivechemica

25、ltreatment.7.Keywds7.1aluminumpretreatmentfpaintingsurfacetreatmentASTMInternationaltakesnopositionrespectingthevalidityofanypatentrightsassertedinconnectionwithanyitemmentionedinthisstard.Usersofthisstardareexpresslyadv

26、isedthatdeterminationofthevalidityofanysuchpatentrightstheriskofinfringementofsuchrightsareentirelytheirownresponsibility.Thisstardissubjecttorevisionatanytimebytheresponsibletechnicalcommitteemustbereviewedeveryfiveyear

27、sifnotrevisedeitherreapprovedwithdrawn.YourcommentsareinvitedeitherfrevisionofthisstardfadditionalstardsshouldbeaddressedtoASTMInternationalHeadquarters.Yourcommentswillreceivecarefulconsiderationatameetingoftheresponsib

28、letechnicalcommitteewhichyoumayattend.IfyoufeelthatyourcommentshavenotreceivedafairhearingyoushouldmakeyourviewsknowntotheASTMCommitteeonStardsattheaddressshownbelow.ThisstardiscopyrightedbyASTMInternational100BarrHarbDr

29、ivePOBoxC700WestConshohockenPA194282959UnitedStates.Individualreprints(singlemultiplecopies)ofthisstardmaybeobtainedbycontactingASTMattheaboveaddressat6108329585(phone)6108329555(fax)(email)throughtheASTMwebsite(www.astm

溫馨提示

  • 1. 本站所有資源如無特殊說明，都需要本地電腦安裝OFFICE2007和PDF閱讀器。圖紙軟件為CAD,CAXA,PROE,UG,SolidWorks等.壓縮文件請下載最新的WinRAR軟件解壓。
  • 2. 本站的文檔不包含任何第三方提供的附件圖紙等，如果需要附件，請聯(lián)系上傳者。文件的所有權(quán)益歸上傳用戶所有。
  • 3. 本站RAR壓縮包中若帶圖紙，網(wǎng)頁內(nèi)容里面會有圖紙預(yù)覽，若沒有圖紙預(yù)覽就沒有圖紙。
  • 4. 未經(jīng)權(quán)益所有人同意不得將文件中的內(nèi)容挪作商業(yè)或盈利用途。
  • 5. 眾賞文庫僅提供信息存儲空間，僅對用戶上傳內(nèi)容的表現(xiàn)方式做保護(hù)處理，對用戶上傳分享的文檔內(nèi)容本身不做任何修改或編輯，并不能對任何下載內(nèi)容負(fù)責(zé)。
  • 6. 下載文件中如有侵權(quán)或不適當(dāng)內(nèi)容，請與我們聯(lián)系，我們立即糾正。
  • 7. 本站不保證下載資源的準(zhǔn)確性、安全性和完整性, 同時也不承擔(dān)用戶因使用這些下載資源對自己和他人造成任何形式的傷害或損失。

評論

0/150

提交評論