【英文标准名称】:StandardTestMethodforMeasurementofOxidation-ReductionPotential(ORP)ofSoil
【原文标准名称】:土壤氧化还原电位(ORP)测量的标准试验方法
【标准号】:ASTMG200-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:G01.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:ORP;oxidation-reductionpotential;soil
【摘要】:SoilORP,inconjunctionwithothersoilcharacteristicssuchaselectricalresistivity(seeTestMethodsG57andG187),isusedtopredictcorrosiontendenciesofburiedmetallicstructures(forexample,pipelinesandculverts.TheORPofthesoilisoneofmanyfactorsthatinfluencestructureservicelife.Itsmeasurementisusedinthedesignofnewburiedstructuresandintheevaluationofexistingburiedstructures.SoilORPisatime-sensitivemeasurement.Foranaccurateindicationofsoilcorrosivity,themeasurementshouldbemadeassoonaspracticableafterremovalofthesoilsamplefromtheground.TheuserofthistestmethodisresponsiblefordeterminingthesignificanceofreportedORPmeasurements.ORPaloneshouldtypicallynotbeusedincharacterizingthecorrosivityofaparticularsoil.ORPmeasurementsareappropriatewhenevaluatingoxygenrelatedreactions.ORPmeasurementscansometimesbequitevariableandnon-reproducible.Thisisrelated,inpart,tothegeneralheterogeneityofagivensoil.Itisalsorelatedtotheintroductionofincreasedoxygenintothesampleafterextraction.TheinterpretationofsoilORPshouldbeconsideredintermsofitsgeneralrangeratherthanasanabsolutemeasurement.ORPmeasurementscanbeusedtodetermineifaparticularsoilhasthepropensitytosupportmicrobiologicallyinfluencedcorrosion(MIC)attack.Thesemeasurementscanalsobeusedtoprovideanindicationofwhethersoilconditionswillbeaerobicoranaerobic.AppendixX1providesreferenceguidelinesforgeneralinterpretationofORPdata.1.1Thistestmethodcoversaprocedureandrelatedtestequipmentformeasuringoxidation-reductionpotential(ORP)ofsoilsamplesremovedfromtheground.1.2TheprocedureinSection9isappropriateforfieldandlaboratorymeasurements.1.3Accuratemeasurementofoxidation-reductionpotentialaidsintheanalysisofsoilcorrosivityanditsimpactonburiedmetallicstructurecorrosionrates.1.4Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:B11
【国际标准分类号】:13_080_30
【页数】:4P.;A4
【正文语种】:英语