Designation:B490−09(Reapproved2014)StandardPracticeforMicrometerBendTestforDuctilityofElectrodeposits1ThisstandardisissuedunderthefixeddesignationB490;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticedescribesaprocedureformeasuringtheductilityofelectrodepositedfoils.21.2Thispracticeissuitableonlyfortheevaluationofelectrodepositshavinglowductility.1.3Theobtainedductilityvaluesmustonlybeconsideredsemi-quantitativebecausethistesthasasignificantoperatordependence.1.4Thispracticeisbestusedforin-houseprocesscontrolwheremeasurementsarealwaysmadebythesameoperator.Achangeinductilityvaluecanbeusedasanindicationofpossiblechangesintheelectroplatingsolution.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:3B456SpecificationforElectrodepositedCoatingsofCopperPlusNickelPlusChromiumandNickelPlusChromium3.SummaryofPractice3.1Thispracticeconsistsofmeasuringthebendofafoilheldbetweenthejawsofamicrometer;thesearecloseduntilfractureorcracksappear.4.SignificanceandUse4.1Thispracticeisusefulasonemethodofcontrollingsomeelectroplatingsolutions.Itservestoindicatethepresenceofcontaminationorsomeotheradversecondition.4.2Ductilitymeasurementsareofparticularvaluewhenelectroplatedpartsaretobesubjectedtomoderatestresssuchasthatinvolvedinboltinganelectroplatedbumpertoanautomobileorwhenexposedtoawiderangeoffluctuatingtemperatures(thermalshock).5.Apparatus5.1Micrometer,25-mmwithflatjawstomeasurethethicknessandtocompressthefoil.5.2Toolssuchasahandorpo...
