Designation:B418−16aStandardSpecificationforCastandWroughtGalvanicZincAnodes1ThisstandardisissuedunderthefixeddesignationB418;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoverscastandwroughtgalvaniczincanodesusedforthecathodicprotectionofmorenoblemetalsandalloysinseawater,brackishwater,othersalineelectrolytes,orothercorrosiveenvironments.1.2TypeIanodesaremostcommonlyusedforsuchapplications.TheTypeIanodecompositioninthisspecifica-tionmeetsthechemicalcompositionrequirementsofMIL-A-18001K.1.3Zincanodesconformingtothisspecificationmaybeusedinotherwaters,electrolytes,backfills,andsoilswhereexperiencehasshownthatthespecifiedcompositionisefficientandreliable.TypeIIanodesaremostcommonlyusedforsuchapplications.1.4Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.ItistheresponsibilityoftheuserofthisstandardtobecomefamiliarwithallhazardsincludingthoseidentifiedintheappropriateSafetyDataSheet(SDS)forthisproduct/materialasprovidedbythemanufacturer,toestablishappropriatesafetyandhealthpractices,anddeterminetheapplicabilityofregulatorylimi-tationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2B6SpecificationforZincB899TerminologyRelatingtoNon-ferrousMetalsandAl-loysB949SpecificationforGeneralRequirementsforZincandZincAlloyProductsE29PracticeforUsingSignificantDigitsinTestDatatoDetermineConformancewithSpecificationsE527PracticeforNumberingMetalsandAlloysintheUnifiedNumberingSystem(UNS)E536TestMethodsforChemicalAnalysisofZincandZincAlloys2.2MilitaryStandard:3MIL-A-18001Kw/INT.AMENDMENT3,24October2007MilitarySpecificationAnod...
