ASTM_C_1662_-_10.pdf

Designation:C166210Standard Practice forMeasurement of the Glass Dissolution Rate Using theSingle-Pass Flow-Through Test Method1This standard is issued under the fixed designation C1662;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice describes a single-pass flow-through(SPFT)test method that can be used to measure the dissolutionrate of a homogeneous silicate glass,including nuclear wasteglasses,in various test solutions at temperatures less than100C.Tests may be conducted under conditions in which theeffects from dissolved species on the dissolution rate areminimized to measure the forward dissolution rate at specificvalues of temperature and pH,or to measure the dependence ofthe dissolution rate on the concentrations of various solutespecies.1.2 Tests are conducted by pumping solutions in either acontinuous or pulsed flow mode through a reaction cell thatcontains the test specimen.Tests must be conducted at severalsolution flow rates to evaluate the effect of the flow rate on theglass dissolution rate.1.3 This practice excludes static test methods in which flowis simulated by manually removing solution from the reactioncell and replacing it with fresh solution.1.4 Tests may be conducted with demineralized water,chemical solutions(such as pH buffer solutions,simulatedgroundwater solutions,and brines),or actual groundwater.1.5 Tests may be conducted with crushed glass of a knownsize fraction or monolithic specimens having known geometricsurface area.The reacted solids may be examined to provideadditional information regarding the behavior of the material inthe test and the reaction mechanism.1.6 Tests may be conducted with glasses containing radio-nuclides.However,this test method does not address safetyissues for radioactive samples.1.7 Data from these tests can be used to determine thevalues of kinetic model parameters needed to calculate theglass corrosion behavior in a disposal system over long periods(for example,see Practice C1174).1.8 This practice must be performed in accordance with allquality assurance requirements for acceptance of the data.1.9 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.10 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C92 Test Methods for Sieve Analysis and Water Content ofRefractory MaterialsC169 Test Methods for Chemical Analysis of Soda-Limeand Borosilicate GlassC429 Test Method for Sieve Analysis of Raw Materials forGlass ManufactureC693 Test Method for Density of Glass by BuoyancyC1109 Practice for Analysis of Aqueous Leachates fromNuclear Waste Materials Using Inductively CoupledPlasma-Atomic Emission SpectroscopyC1174 Practice for Prediction of the Long-Term Behavior ofMaterials,Including Waste Forms,Used in EngineeredBarrier Systems(EBS)for Geological Disposal of High-Level Radioactive WasteC1220 Test Method for Static Leaching of Monolithic WasteForms for Disposal of Radioactive WasteC1285 Test Methods for Determining Chemical Durabilityof Nuclear,Hazardous,and Mixed Waste Glasses andMultiphase Glass Ceramics:The Product Consistency Test(PCT)D1129 Terminology Relating to WaterD1193 Specification for Reagent WaterD1293 Test Methods for pH of WaterE691 Practice for Conducting an Interlaboratory Study to1This practice is under the jurisdiction of ASTM Committee C26 on NuclearFuel Cycle and is the direct responsibility of Subcommittee C26.13 on Spent Fueland High Level Waste.Current edition approved June 1,2010.Published July 2010.Originally approvedin 2007.Last previous edition approved in 2007 as C1662-07.DOI:10.1520/C1662-10.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 Determine the Precision of a Test Method3.Terminology3.1 Definitions:3.1.1 alteration phase,na solid phase formed as a resultof corrosion,including phases precipitated from solution,leached layers,and phases formed within leached layers.3.1.2 back reaction,nreaction between dissolved compo-nents and the glass surface to reform bonds that are brokenduring glass dissolution.3.1.3 chemical durability,nthe resistance of a glass todissolution under particular test conditions.3.1.4 continuous flow,nthe contin