Designation:D2688−15´1StandardTestMethodforCorrosivityofWaterintheAbsenceofHeatTransfer(WeightLossMethod)1ThisstandardisissuedunderthefixeddesignationD2688;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—Aneditorialcorrectionwasmadeto13.3.2inJuly2016.1.Scope1.1Thistestmethodcoversthedeterminationofthecorro-sivityofwaterbyevaluatingpittingandbymeasuringtheweightlossofmetalspecimens.Pittingisaformoflocalizedcorrosion:weightlossisameasureoftheaveragecorrosionrate.Therateofcorrosionofametalimmersedinwaterisafunctionofthetendencyforthemetaltocorrodeandisalsoafunctionofthetendencyforwaterandthematerialsitcontainstopromote(orinhibit)corrosion.1.2Thetestmethodemploysflat,rectangular-shapedmetalcouponswhicharemountedonpipeplugsandexposedtothewaterflowinginmetalpipinginmunicipal,building,andindustrialwatersystemsusingasidestreamcorrosionspeci-menrack.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesaremathematicalconversionstoinch-poundunitsthatareprovidedforinforma-tiononlyandarenotconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1129TerminologyRelatingtoWaterD2331PracticesforPreparationandPreliminaryTestingofWater-FormedDepositsD2777PracticeforDeterminationofPrecisionandBiasofApplicableTestMethodsofCommitteeD19onWaterG1PracticeforPreparing,Cleaning,andEvaluatingCorro-sionTestSpecimensG16GuideforApplyingStatisticstoAnalysisofCorrosionData3.Terminology3.1Definitions—Fordefinitionsoftermsusedinthisstandard,refertoTerminologyD1129.4.SignificanceandUse4.1Sincethetwotendenciesareins...
