Designation:D4627−12(Reapproved2017)StandardTestMethodforIronChipCorrosionforWater–MiscibleMetalworkingFluids1ThisstandardisissuedunderthefixeddesignationD4627;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversevaluationoftheferrouscor-rosioncontrolcharacteristicsofwater–misciblemetalworkingfluids.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.2.1Exception—Note1containsinch-poundunitssincethedrillsizesandfeedratesdonothavereadilyavailablemetricequivalents.1.2.2Exception—U.S.Standardsievesizesincludemeshvalues.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.Terminology2.1Definitions:2.1.1rust,n—corrosionproductconsistingprimarilyofhydratedironoxides.2.2DefinitionsofTermsSpecifictoThisStandard:2.2.1breakpoint,n—weakestconcentrationofthewater-misciblemetalworkingfluidtestedthatleavesnoruststainonthefilterpaper.3.SummaryofTestMethod3.1Castironchipsareplacedinapetridishcontainingafilterpaperanddilutedmetalworkingfluid.Thedishiscoveredandallowedtostandovernight.Theamountofruststainonthefilterpaperisanindicationofthecorrosioncontrolprovidedbythefluid.4.SignificanceandUse4.1Theresultsobtainedbythistestareausefulguidelineindeterminingtheabilityofwater-misciblemetalworkingfluidstopreventor...
