Designation:B456−17StandardSpecificationforElectrodepositedCoatingsofCopperPlusNickelPlusChromiumandNickelPlusChromium1ThisstandardisissuedunderthefixeddesignationB456;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thisspecificationcoversrequirementsforseveraltypesandgradesofelectrodepositedcopperplusnickelpluschro-miumornickelpluschromiumcoatingsonsteel,nickelpluschromiumcoatingsoncopperandcopperalloys,nickelpluschromiumcoatingsonType300and400seriesstainlesssteelandcopperplusnickelpluschromiumcoatingsonaluminumanditsalloysandzincalloysforapplicationswherebothappearanceandprotectionofthebasismetalagainstcorrosionareimportant.Fivegradesofcoatingsareprovidedtocorre-spondwiththeserviceconditionsunderwhicheachisexpectedtoprovidesatisfactoryperformance:namely,extendedverysevere,verysevere,severe,moderate,andmild.DefinitionsandtypicalexamplesoftheseserviceconditionsareprovidedinAppendixX1.1.2Thisspecificationdoesnotcovertherequirementsfortheplatingonplastics,seeSpecificationB604.1.3Thefollowinghazardscaveatpertainsonlytothetestmethodsportions,AppendixX2,AppendixX3,AppendixX4,andAppendixX5ofthisspecification:Thisstandarddoesnotpurporttoaddressallofsafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2B183PracticeforPreparationo...
