Designation:F326−96(Reapproved2012)StandardTestMethodforElectronicMeasurementforHydrogenEmbrittlementFromCadmium-ElectroplatingProcesses1ThisstandardisissuedunderthefixeddesignationF326;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversanelectronichydrogendetec-tioninstrumentprocedureformeasurementofplatingperme-abilitytohydrogen.Thismethodmeasuresavariablerelatedtohydrogenabsorbedbysteelduringplatingandtothehydrogenpermeabilityoftheplateduringpostplatebaking.Aspecificapplicationofthismethodiscontrollingcadmium-platingprocessesinwhichtheplateporosityrelativetohydrogeniscritical,suchascadmiumonhigh-strengthsteel.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecifichazardstatement,seeSection8.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.2.ReferencedDocuments2.1ASTMStandards:2D1193SpecificationforReagentWaterF519TestMethodforMechanicalHydrogenEmbrittlementEvaluationofPlating/CoatingProcessesandServiceEn-vironments3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1hydrogenpressurepeak—themaximumhydrogenpressurevalue(seeIH)obtainedwhentheprobeisheatedfollowingcalibration,plating,orfluidtesting.3.2Symbols:3.2.1HP=calibrationhydrogenpressurepeak.3.2.2HPp=platinghydrogenpressurepeak.3.2.3IE=probecathodeemissioncurrent.3.2.4IH=probehydrogenpressure.3.2.5Iγ=integralofIHcurvefromprobeontoHP.3.2.6lambda=timeinsecondsforhydrogenpressurepeaktodroptohalfitsvalue.3.2.7λ=lambdaobtainedfromacalibrationrun.3.2.8λp=lambdaobtainedfromaplatingrun.3.2.9λpc=normalizedtestlambda,obta...
