ISO316031993

INTERNATIONALSTANDARDISO3160-3Firstedition1993-04-15Watchcasesandaccessories-Goldalloycoverings-Part3:.AbrasionresistancetestsofatypeofcoatingonStandardgaugesBoTtesdemontresetleursaccessoires-ßevetementsd’alliaged’or-Partie3:EssaisderhsistanceaI’abrasiond’untypederevetementsureprouvettesnormaMesReferencenumberISO3160-3:1993(E)ISO3160=3:1993(E)ForewordISO(theInternationalOrganizationforStandardization)isaworldwidefederationofnationalStandardsbodies(ISOmemberbodies).TheworkofpreparingInternationalStandardsisnormallycarriedoutthroughISOtechnicalcommittees.Eschmemberbodyinterestedinasubjectforwhichatechnicalcommitteehasbeenestablishedhastherighttoberepresentedonthatcommittee.Internationalorganizations,governmentalandnon-governmental,inliaisonwithISO,alsotakepattinthework.ISOcollaboratescloselywiththeInternationalElectrotechnicalCommission(IEC)onallmattersofelectrotechnicalstandardization.DraftInternationalStandardsadoptedbythetechnicalcommitteesarecirculatedtothememberbodiesforvoting.PublicationasanInternationalStandardrequiresapprovalbyatleast75%ofthememberbodiescastingavote.InternationalStandardISO3160-3waspreparedbyTechnicalCommitteeISO/TC114,Horology,Sub-CommitteeSC6,Preciousmetalcoverings.ISO3160consistsofthefollowingParts,underthegeneraltitleVVatchcasesandaccessories-Goldalloycoverings:-Part1:Generalrequirements-Part2:Determinationofandadhesionfineness,thickness,corrosionresistance-Part3:AbrasionresistancetestsofatypeofcoatingonStandardgauges0ISO1993Allrightsreserved.Nopattofthispublicationmaybereproducedorutilizedinanyformorbyanymeans,electronieormechanical,includingphotocopyingandmicrofilm,withoutper-missioninwritingfromthepublisher.InternationalOrgankationforStandardizationCasePostale56lCH-l211Geneve20lSwitzerlandPrintedinSwitzerlandiiINTERNATIONALSTANDARDISO3160=3:1993(E)Watchcasesandaccessories-Goldalloycoverings-Part3:AbrasionresistancetestsofatypeofcoatingonStandardgauges1ScopeThispartofISO3160specifiestwotestmethodsforwearandteartobeappliedtoagoldalloycoatinginOrdertodeterminethedegreeofresistancetowearofthistypeofcoating.Thetestmethodsareappli-cabletoaStandardgaugeandnotdirectlytoobjectstreatedwiththetestedtypeofcoating.ThequalityleveliscomparedtothatofaStandardgauge.ThispattofISO3160describes:-dimensionsandcharacteristicsoftheStandardgauge-Standardcoating,-testmethods,-determinationofwear,and-qualitativecomparisonscales.2NormativereferencesThefollowingStandardscontainprovisionswhich,throughreferenceinthistext,constituteprovisionsofthispartofISO3160.Atthetimeofpublication,theeditionsindicatedwerevalid.AllStandardsaresubjecttorevision,andPartiestoagreementsbasedonthispartofISO3160areencouragedtoinvestigatethepossibilityofapplyingthemostrecenteditionsoftheStandardsindicatedbelow.MembersofIECandISOmaintainregistersofcurrentlyvalidInternationalStandards.ISO2361:1982,Electrodepositednicke/coatingsonmagneticandnon-magneticSubstrates-Measure-mentofcoatingthickness-Magnetitmethod.ISO2819:1980,Metalliccoatingsonmetallicsub-strates-Electrodepositedandchemicallydepositedcostings-ßeviewofmethodsavailablefortestingadhesion.ISO3160-1:1982,Watchcasesandaccessories-Goldalloycoverings-Part1:Generalrequirements.ISO3160-2:1992,Watchcasesandaccessories-Goldalloycoverings-Part2:Determinationoffineness,thickness,corrosionresistanceandadhe-sion.ISO3497:1990,Metalliccoatings-Measurementofcostingthickness-X-rayspectrometricmethods.ISO3543:1981,Metallicandnon-metalliccoatings-Measurementofthickness-Betabackscattermethod.ISO4516:1980,Metallicandrelatedcoatings-VickersandKnoopmicrohardnesstests.ISO4524-5:1985,Metalliccoatings-Testmethodsforelectrodepositedgoldandgoldalloycoatings-Part5:Adhesiontests.3DefinitionsForthepurposesofthispattofISO3160,thefollow-ingdefinitionsapply.1ISO3160=3:1993(E)3.1wear:Deteriorationcausedmechanicalremovalofmaterial.byusethrough3.2abrasion:Wearofamaterialbyahardsub-stancethroughfriction.3.3abrasionresistance:Capacitytoendurewearofamaterialbyahardsubstancethroughfriction.3.4adhesion:StrengthofthebondbetweenacoatinganditsSubstrate,expressedastheforteperunitarearequiredtoseparatethem.4Standardgaugeandcoatings4.1Standardgauge4.1.1Dimensions(seefigure1)TheStandardgaugeshallhavethefollowingdimen-sions:-diameteroftheflatref-erencesutface:d1=18mm-totaldiameter:4=24mm&0,2mm-totalthickness:e=l2mm+0,2mm--radiusofconnectionoftheflatreferencesur-facewiththeside:R=3mmfO,lmmDimensionsinmillimetresFigure1-DetailsoftheStandardgauge4.1.2CharacteristicsThearithmeticalmeandeviationoftheroughnessProfile,R,,ofthereferencesurfaceshallbeamaxi-mumof05Pmbeforeapplicationofthecovering.ThebasicmaterialoftheStandardgaugeshallbeatopperalloy,leadfree,withaminimalVickershard-nessof120HV0,2(seeISO4516).4.2Standardizedreferencecoating(Wattsnickel)onastandardizedgaugedesignedforabrasiontestsThiscoating,depositeddirectlyontothegauge,isdesignedtomeasuretheweardepthcausedbytheitemsusedinthetestsdescribedin5.1and5.2.NOTES1IfthethicknessismeasuredbyX-rayfluorescence,anon-coatedstandardizedgaugeofthesamematerialshouldbeavailableinOrde