Designation:A754/A754M−11(Reapproved2016)StandardTestMethodforCoatingWeight(Mass)ofMetallicCoatingsonSteelbyX-RayFluorescence1ThisstandardisissuedunderthefixeddesignationA754/A754M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThistestmethodcoverstheuseofX-rayfluorescence(XRF)fordeterminingthecoatingweight(mass)ofmetalliccoatingsonsteelsheet.Thetestmethodisintendedtobeusedfor“on-line”measurementsofcoatingoncontinuousproduc-tionlines.1.2ThistestmethodisapplicabletothecoatingscoveredbythefollowingASTMspecifications:A599/A599M,A623,A623M,A653/A653M,A792/A792M,A875/A875M,A879/A879M,A918,A924/A924M,A1046/A1046M,andA1063/A1063M.Itmaybeapplicabletoothercoatings,providingthattheelementalnatureofthecoatingandsubstratearecompat-iblewiththetechnicalaspectsofXRFsuchastheabsorptioncoefficientofthesystem,primaryradiation,fluorescentradiation,typeofdetection.1.3Thistestmethodincludestheprocedurefordevelopingasinglestandarddeterminationofcoatingweight(mass).1.4ThistestmethodincludesproceduresforbothX-raytubeandisotopecoatingweight(mass)measuringinstruments.1.5Thevaluesstatedineitherinch-poundunitsorSIunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththespecifi-cation.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2A599/A599MSpecificationforTinMillProducts,Electro-lyticTin-Coated,Cold-RolledSheetA623SpecificationforTinMillProducts,Gene...
