金属电镀件检验标准(CA级英文版)

金属电镀件检验标准(CA级英文版)SpecificationofPlatingonBasisMetals1ScopeThisspecificationcoversrequirementsandtestmethodsforseveraltypesofelectrodepositedfinisheswherebothappearanceandprotectionofthebasismetalagainstcorrosionareimportant.2ReferencedDocumentsASTMB456-95StandardSpecificationforElectrodepositedCoatingsofCopperPlusNickelPlusChromiumandNickelPlusChromiumEN248-2002GeneralSpecificationforElectrodepositedCoatingsofNi-CrASTMB368-97StandardMethodforCopper-AcceleratedAceticAcid-SaltSpray(Fog)TestingASTMB571-97StandardPracticeforQualitativeAdhesionTestingofMetallicCoatingsCSAB125PlumbingFittingsGB5933-86AdhesionTestingMethodoftheMetalDepositsfortheLightIndustrialProductsGB/T10125-97CorrosionTestsinArtificialAtmospheres-SaltSprayTests（eqvISO9227-90）GB6461-86EvaluationofTheCorrosionTestResultsoftheMetalDepositsonCathodeBasisMaterial(eqvISO4540-80)GB5944-86EvaluationoftheCorrosionTestResultsoftheMetalDepositsfortheLightIndustrialProducts3FamiliarVisualDefectsDefectDefinitionAdhesionCoatingthatflakesorrubsoffafterbeingplatedorPVDBlisterBubbledorraisedareathatmoveswhentouchedwithapencilBurnRoughnessandgreyappearanceofsurfaceCloudyMilkywhiteplatingDullnessLackoffullshineEntrapmentLinesAcontinuousorcloselybrokenlinethatappearstobearaisedarea,butisnotlooseplating.GloveSnaggersRoughnessthatbreaksofforsnagsfibersfromaclothGrossFlawAnyofthedefectsthatcaneasilybeseenmorethan900mmawayorcauseacorrosionfailureorinterferewithfunction.CutsandscratchesScratchesduetohandlingorknocksduringtransportMissoutAreaonsurfacethatneverreceivedcoatingPitsDepressionintheplatedsurfacePorosityNumeroussmallcloselyspacedpitsRoughnessBumpy,roughsurfaceraisedanddetectablebytoughStains/ResidueBrown,nonuniformdarkshapesurfacecontaminationthatcanberemovedbyvigorouswipingStardustingSparklyappearancelikesmallstarsordustonthesurfaceToollineThinraisedlinesorscratchedinbasematerial4ZoneDefinitionAzone：Thisisthemostcriticalcosmeticarticleofthepart.TheAzoneisusuallythemoststrikingfeature.Itiswhatthecustomerseesfirstorisclosesttothecustomerintheinstalledposition.Bzone：Thesefeaturesareimportantbutfurtherremovedfromthecustomer.Bzonesurfaceareeasytoseeintheinstalledposition.Czone：Thesearetheleastimportantfeaturesinareasnotdirectlyseen.Often,youmustmoveyourheadortheproductasignificantamounttoseeCzonesintheinstalledposition.Dzone：Thesezonesarenotimportantandcannotbeseenatallafterinstallation.OntheDzonesoftheelectroplatedarticlewherethefollowdefectsareacceptable：Pit,porosity,roughness,stardusting,cutsandscratches,toollines,grossflaws,roughplating,cloudyplating,stains,burns,missout,blisters.Adhesionfailuressuchascracksandpeelingplateshallbeavoided.5AppearanceCriteriadefectAcceptcriterionaestheticAzoneBzoneCzonepits、roughplating、cutsandscratchesRoundnessdefectmaxsize0.1mm20.2mm20.4mm2Themaxspacetoeachother19mm13mm3mmAcceptableamount234burnsIffeltandnotseenintheinstalledpositionCloudyplatingPervisualcontrolsampleslightAfewmoderateporositystardustingToollinerejectEntrapmentLinesRejectOneallowedinthezoneupto13mmmaxsizeTwoallowedinthezoneupto13mmmaxsize,nocloserthan3mmtoeachother.DiscoloredPercontrolrangesamples:twotonecolorisOKprovidingthatbotharewithintherangeandthedifferenceisnotseeninassembled/installedposition.stainedrejectrejectrejectfunctionalAdhesionfailurerejectrejectrejectblisterGrossflawGlovesnaggermissout6FunctionalRequirement6.1DimensionTheimportdimensionsandconnectthreadsshallbecomplywiththedrawing.6.2DepositThicknessRequirementThicknessOncopperOnzincalloysCopper/≥7.6μmNickel≥5μm≥7.6μmChromium≥0.1μm≥0.1μmAurumthearticlesshallnotdiscoloredperthecontrolsamples.Remark:1.Platingthicknessshallbedeterminedbymeasuringthicknessofthreetypicalareasonthearticle.Theseshouldincludelow/highcurrentdensityareas.Theaverageofthemeasurementsshallnotlessthantheabovethickness.2.Unlessclienthavestresstheplatingthicknessinparticular,thenickelandcopperplatingthicknesscanberegulatedbaseonthecorrosiontestandthermalcycletest..6.3CorrosionTestingRequirementCASS4hRequirement1.Afterthecorrosiontesting,thearticlesshallcomplywithCSAB125Clause6.1.3:Thearticleshallnotexhibitmorethanonecorrosionspotper645mm2ofsurfacearea,exceptthatuptothreeminorspotsmaybepermittedona25mmlengthofpartsline.Spotsshallnotbemorethan0.8mminanydimension.2.Afterthecorrosiontesting,thearticleshallthe9thgradecriteriainGB64616.3AdhesionrequirementTheTestMethodRequirement1)Headthecoatedcopperarticleinanoventoreachthetemperatureof250℃±10℃.Maintainthetemperaturefor1hour,thenquenchthepartinwateratthetemperatureof18℃－25℃。2)Headthecoatedzincarticleinanoventoreachthetemperatureof150℃±10℃.Maintainthetemperaturefor1hour,thenquenchthepartinwateratthetemperatureof18℃－25℃。Flakingorpeelingofthedepositisevidenceofunsatisfactoryadhesion.Blistersmayeruptduringtheheadandquenchtestwhenplatingsolutionisentrappedinsubstratesurfacepitsorporeswhicharebridgedbythedeposit.Ifthedepositedcoatingcannotbepeeledorliftedfromthesubstrateinanareaadjacenttoblister,theappearanceofblistersshouldnotbeinterpretedasevidenceofinferioradhesion.7．Inspectmethod7.1