TL 52132-EN-2021 螺纹紧固件润滑剂

GroupstandardTL52132

Issue2021-11

Class.No.:57254

Descriptors:Cr(VI)-free,bolt,coefficientoffriction,electrolyticallyzinc-coated,lubricant,nut,stainlesssteel,threadedfastener,zincflake

LubricantsforThreadedFasteners

Requirements

Previousissues

TL52165:1995-01;TL52132:1986-01,2004-08,2012-08,2014-08,2019-12

Changes

ThefollowingchangeshavebeenmadetoTL52132:2019-12:

a)

Section„Re-lubrication“3.5

revised

b)Appendix„Materialreleaselist“deleted

c)Standardedited

1Scope

Thisstandarddefinestherequirementsforlubricantsforthreadedfasteners.

SurfaceprotectiontypeswithlubricantsasperTechnicalSupplySpecificationTL52132arelistedinVolkswagenstandard

VW13750

.

TL52502

appliestoaluminumthreadedfasteners.

2Designation

LubricantasperTL52132

3Requirements

3.1Generalrequirements

ApprovaloffirstsupplyandchangesasperVolkswagenstandard

VW01155

.Chemicalsafetyevaluationasper

VW50156

.

MaterialconformityasperVolkswagenstandard

VW91101

.

Alwaysusethelatestversionofthisstandard.

Thiselectronicallygeneratedstandardisauthenticandvalidwithoutsignature.Acommaisusedasthedecimalsign.TheEnglishtranslationisbelievedtobeaccurate.Incaseofdiscrepancies,theGermanversioncontrols.

Page1of3

Allrightsreserved.NopartofthisdocumentmaybeprovidedtothirdpartiesorreproducedwithoutthepriorconsentofoneoftheVolkswagenGroup’sStandardsdepartments.|internal

©VolkswagenAktiengesellschaft

VWNORM-2020-10

Page2

TL52132:2021-11

IfafastenerwithasurfaceprotectiondescribedinaspecificTLisusedandthisfasteneriscoatedwithlubricantasperTL52132,thecoefficientsoffrictionrequiredbytheTLdescribingthesurfaceprotectionmustbeadheredto.

ForallfastenerswithoutadditionalsurfacecoatingorwithasurfaceprotectionthatisnotdescribedviaaTLin

VW13750

andthatusealubricantcoatingasperTL52132,thecoefficientsoffrictionrequiredasper

VW01129

apply.

PartscoatedwithalubricantasperthisTLmustmeettheS3cleanlinessrequirementsasper

VW01134

,ifapplicable.

Thepropertiesoftheproductsdifferandmustbetestedfortherespectiveusecasewithrespecttothecoefficientsoffrictiontobeachieved.Particularinfluencessuchasfasteningspeedsormatingsurfacesatthethreadedconnectionpointsmustbeconsidered.

Forexaminationpurposes(Yes/Nostatement),thecoatingmustcontainanultraviolet(UV)inhibi-torasanindicator.

ForOfl-t615asper

TL245

,agreencolor(colorsimilartoRAL6000)mustbeused.

3.2Class

Water-dispersedsyntheticpolymersthatyieldatouch-drylubricantfilm/lubricantlayerafterappli-cationanddryinganddonotcontainhazardoussubstances.Thecoatingagentmustbesilicone-free.

3.3Requirementsforthelubricantapplicationprocess

Itmustbeensuredthatnoresiduesofchromicacid,chromicsolutions,orotheracidresiduescanenterintothelubricantcoatingbath.

Inordertoavoidtheriskofcondensation,thepartsmustbepackageddryandonlyafterreachingambient(room)temperature.

Checktheefficiencyofthelubricantcoatingwithrespecttothecoefficientsoffrictionofthethrea-dedelementsincoordinationwiththereceivingplant.

NOTE:Ifthreadedfastenersthathavealreadybeencoatedwithlubricantarecoatedonceagain,thiscanyielddifferentcoefficientsoffrictionthanforthefirstcoating.

3.4Notesonthelubricantapplicationprocess

Thechosenprocessmustguaranteereliableandevenwettingofthesurfacewithlubricant.Priortoapplicationofthelubricant,thepartstobecoatedmustbedryandslightlyheated(objecttemper-atureapprox.40°Cto50°C,notexceeding75°C).Thetemperatureofthecoatingagentmustnotfallbelow20°Cduringcoating(optimum:25°Cto35°C,notexceeding45°C).

Thecoatingagentisusuallysuppliedasaconcentrate.Themixingratioofcoatingagentconcen-trateand,preferably,demineralizedwatermustbechoseninsuchawayastoachieveandmain-tainthedesiredcoefficientsoffrictionovertheoveralllayerstructure.

Thebathconcentrationmustbecheckedbydeterminingthedryresidueorusingarefractometer,anddocumented.

Thebath(pHvalue)mustbecheckedbasedonthespecificationsofthecoatingagentmanufactur-er(frequency:atleastoncepershift/day,takingintoaccountthespecifiedlimits).

Coatedthreadedpartsarepreferablydriedinatunnel-typesystem,butacentrifugalsystemisalsopossible.Dryingmustbeperformedataspeedsuitedtothepartsspectrumandwiththe

Page3TL52132:2021-11

applicationofheat.Theprecisesettingparameters(rotationalspeed,temperature,fillingquantity)mustbedeterminedanddocumentedbythecoatingcompanyincollaborationwiththecoating

agentmanufacturer.Themaximumpermissibletemperatureforthecoatingsystemmustbeob-served,e.g.,max.90°CforCr(VI)-freepassivationtreatments.

3.5Re-lubrication

Thereasonforre-lubricationmaybethreadedfastenersthatcannotbe(reliably)coated.Rework-ingofimproperlylubricatedpartsthatdonotachievetherequiredcoefficientsoffrictionasper

VW01129

fortherespectiveusecaseispermissiblewithareleasebasedontherespectiveusecase(deviationpermit).

Thepartstobecoatedmustbefreeofoilandgrease,andthesolventmustbeevaporatedbeforefurtherprocessing.Cleanliness,avoidanceofcontaminants,uniformwetting,andeffectivenessofthelubricantcoatingmustalsobeobserved.Theprocessesofpre-heatinganddryingareomittedinthisprocedure.

Thereleasebasedontherespectiveusecaseismandatorybecausethecommonlyusedre-lubri-cationsolutions(sprays)maycontainhazardoussubstances(propellants)aswellassubstancesimpairingpaintwettingability.TherespectivesafetydatasheetbytheEuropeanCommunitymustbeconsidered.

4Applicabledocuments

Thefollowingdocumentscitedinthestandardarerequiredfortheapplicationofthisstandard:

SomeoftheciteddocumentsaretranslationsfromtheGermanoriginal.ThetranslationsofGer-mantermsinsuchdocumentsmaydifferfromthoseusedinthisstandard,resultinginterminologi-calinconsistency.

StandardswhosetitlesaregiveninGermanmaybeavailableonlyinGerman.Editionsinotherlanguagesmaybeavailablefromtheinstitutionissuingthestandard.

TL245

Non-ElectrolyticallyAppliedZinc