【英文标准名称】:StandardPracticeforMeasurementoftheGlassDissolutionRateUsingtheSingle-PassFlow-ThroughTestMethod
【原文标准名称】:单流流过试验法测定玻璃溶解速度的标准实施规程
【标准号】:ASTMC1662-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:C26.13
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:glassdissolutionrate;Dissolutionrate;Glass
【摘要】:ThispracticeprovidesaprescriptivedescriptionofthedesignofaSPFTtestapparatusandidentifiesaspectsoftheperformanceofSPFTtestsandinterpretationoftestresultsthatmustbeaddressedbytheexperimentertoprovideconfidenceinthemeasureddissolutionrate.TheSPFTtestmethoddescribedinthispracticecanbeusedtocharacterizevariousaspectsofglasscorrosionbehaviorthatcanbeutilizedinamechanisticmodelforcalculatinglong-termbehaviorofanuclearwasteglass.Dependingonthevaluesoftestparametersthatareused,theresultsofSPFTtestscanbeusedtomeasuretheintrinsicdissolutionrateofaglass,thetemperatureandpHdependenciesoftherate,andtheeffectsofvariousdissolvedspeciesonthedissolutionrate.Thereactedsamplerecoveredfromatestmaybeexaminedwithsurfaceanalyticaltechniques,suchasscanningelectronmicroscopy,tofurthercharacterizethecorrosionbehavior.Suchexaminationsmayprovideevidenceregardingwhethertheglassisdissolvingstoichiometrically,ifparticularleachedlayersandsecondaryphaseswereformedonthespecimensurface,andsoforth.Theseoccurrencesmayimpacttheaccuracyoftheglassdissolutionratethatismeasuredusingthismethod.Thispracticedoesnotaddresstheanalysisofsolidreactionmaterials.1.1Thispracticedescribesasingle-passflow-through(SPFT)testmethodthatcanbeusedtomeasurethedissolutionrateofahomogeneoussilicateglass,includingnuclearwasteglasses,invarioustestsolutionsattemperatureslessthan100x00B0;C.TestsmaybeconductedunderconditionsinwhichtheeffectsfromdissolvedspeciesonthedissolutionrateareminimizedtomeasuretheforwarddissolutionrateatspecificvaluesoftemperatureandpH,ortomeasurethedependenceofthedissolutionrateontheconcentrationsofvarioussolutespecies.1.2Testsareconductedbypumpingsolutionsineitheracontinuousorpulsedflowmodethroughareactioncellthatcontainsthetestspecimen.Testsmustbeconductedatseveralsolutionflowratestoevaluatetheeffectoftheflowrateontheglassdissolutionrate.1.3Thispracticeexcludesstatictestmethodsinwhichflowissimulatedbymanuallyremovingsolutionfromthereactioncellandreplacingitwithfreshsolution.1.4Testsmaybeconductedwithdemineralizedwater,chemicalsolutions(suchaspHbuffersolutions,simulatedgroundwatersolutions,andbrines),oractualgroundwater.1.5Testsmaybeconductedwithcrushedglassofaknownsizefractionormonolithicspecimenshavingknowngeometricsurfacearea.Thereactedsolidsmaybeexaminedtoprovideadditionalinformationregardingthebehaviorofthematerialinthetestandthereactionmechanism.1.6Testsmaybeconductedwithglassescontainingradionuclides.However,thistestmethoddoesnotaddresssafetyissuesforradioactivesamples.1.7Datafromthesetestscanbeusedtodeterminethevaluesofkineticmodelparametersneededtocalculatetheglasscorrosionbehaviorinadisposalsystemoverlongperiods(forexample,seePracticeC1174).1.8Thispracticemustbeperformedinaccordancewithallqualityassurancerequirementsforacceptanceofthedata.1.9ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.10Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabil......
【中国标准分类号】:Q30
【国际标准分类号】:81_040_30
【页数】:12P.;A4
【正文语种】:英语