Designation:B530−09(Reapproved2014)StandardTestMethodforMeasurementofCoatingThicknessesbytheMagneticMethod:ElectrodepositedNickelCoatingsonMagneticandNonmagneticSubstrates1ThisstandardisissuedunderthefixeddesignationB530;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethodcoverstheuseofmagneticinstrumentsforthenondestructivemeasurementofthethicknessofanelectrodepositednickelcoatingoneitheramagneticornon-magneticsubstrate.Itisintendedtosupplementmanufacturers’instructionsfortheoperationoftheinstrumentsandisnotintendedtoreplacethem.1.2Theseinstrumentsmeasureeitherthemagneticattrac-tionbetweenamagnetandthecoating-substratecombination(categorizedas“magneticpull-off”),orthechangeinmagneticfluxdensitywithintheprobe(categorizedas“electronic”).1.3Forthistestmethod,therearetwotypesofcoating-substratecombinationsthatcanbeencountered:TypeA,nickelcoatingsonamagneticsubstrate,andTypeB,nickelcoatingsonanonmagneticsubstrate.1.4Theeffectivemeasuringrangesofinstrumentsusingtheprincipleofmagneticattractionareupto50µm(2mils)forTypeAcoatings,andupto25µm(1mil)forTypeBcoatings.Forgagesbasedonchangeinmagneticfluxdensityprinciples,theeffectiverangesaremuchgreater,andmeasurementsupto1mm(40mils)ormore,canbemadeonbothtypesofcoatings.1.5MeasurementsmadeinaccordancewiththistestmethodwillbeincompliancewiththerequirementsofISOStan-dard2361asprintedin1982.1.6ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriort...
