1、Designation:E155215Standard Test Method forDetermining Hafnium in Zirconium and Zirconium Alloys ByDirect Current PlasmaAtomic Emission Spectrometry1This standard is issued under the fixed designation E1552;the number immediately following the designation indicates the year oforiginal adoption or,in
2、 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 test method covers the determination of hafnium inzirconium and zirconium alloys wit
3、h composition greater than0.003%(30 mg/kg).1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.3 This standard does not purport to address all of thesafety problems,if any,associated with its use.It is theresponsibility of the
4、user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.Specific precau-tionary statements are given in Section 8.2.Referenced Documents2.1 ASTM Standards:2B349/B349M Specification for Zirconium Sponge and Ot
5、herForms of Virgin Metal for Nuclear ApplicationB350/B350M Specification for Zirconium and ZirconiumAlloy Ingots for Nuclear ApplicationB351/B351M Specification for Hot-Rolled and Cold-Finished Zirconium and Zirconium Alloy Bars,Rod,andWire for Nuclear ApplicationB352/B352M Specification for Zirconi
6、um and ZirconiumAlloy Sheet,Strip,and Plate for Nuclear ApplicationB353 Specification for Wrought Zirconium and ZirconiumAlloy Seamless and Welded Tubes for Nuclear Service(Except Nuclear Fuel Cladding)B493 Specification for Zirconium and Zirconium AlloyForgingsB494/B494M Specification for Primary Z
7、irconiumB495 Specification for Zirconium and Zirconium Alloy In-gotsB523/B523M Specification for Seamless and Welded Zirco-nium and Zirconium Alloy TubesB550/B550M Specification for Zirconium and ZirconiumAlloy Bar and WireB551/B551M Specification for Zirconium and ZirconiumAlloy Strip,Sheet,and Pla
8、teB614 Practice for Descaling and Cleaning Zirconium andZirconium Alloy SurfacesB653/B653M Specification for Seamless and Welded Zirco-nium and Zirconium Alloy Welding FittingsB658/B658M Specification for Seamless and Welded Zirco-nium and Zirconium Alloy PipeB752 Specification for Castings,Zirconiu
9、m-Base,CorrosionResistant,for General ApplicationB811 Specification for Wrought Zirconium Alloy SeamlessTubes for Nuclear Reactor Fuel CladdingE50 Practices for Apparatus,Reagents,and Safety Consid-erations for Chemical Analysis of Metals,Ores,andRelated MaterialsE135 Terminology Relating to Analyti
10、cal Chemistry forMetals,Ores,and Related MaterialsE1097 Guide for Determination of Various Elements byDirect Current Plasma Atomic Emission Spectrometry3.Terminology3.1 For definitions of terms used in this test method,refer toTerminology E135.4.Summary of Test Method4.1 The sample,in the form of dr
11、illings,chips,milling,turnings,or powder,is dissolved in dilute hydrofluoric acid(HF).The hafnium content is measured using a direct currentplasma(DCP)spectrometer,which is calibrated with referencesolutions of hafnium in the presence of zirconium.Themicroprocessor is programmed to display the resul
12、ts in micro-grams per millilitre(g/mL).5.Significance and Use5.1 When zirconium materials are used in nuclearapplications,it is necessary that hafnium,a neutron absorber,be present only at very low concentrations.5.2 This test method is useful in testing materials forcompliance with the compositiona
13、l requirements as given in1This test method is under the jurisdiction of ASTM Committee E01 onAnalytical Chemistry for Metals,Ores,and Related Materials and is the directresponsibility of Subcommittee E01.06 on Ti,Zr,W,Mo,Ta,Nb,Hf,Re.Current edition approved May 15,2015.Published June 2015.Originall
14、yapproved in 1993.Last previous edition approved in 2008 as E1552 08.DOI:10.1520/E1552-15.2For 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
15、page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 Specifications B349/B349M,B350/B350M,B351/B351M,B352/B352M,B353,B493,B494/B494M,B495,B523/B523M,B550/B550M,B551/B551M,B653/B653M,B658/B658M,B752,and B811.6.Apparatus6
16、.1 Plastic Labware:6.1.1 Beakers,100 mL,disposable,polypropylene,or 125mL polytetrafluoroethylene(PTFE)are satisfactory.6.1.2 Volumetric FlasksLinear polyethylene(LPE)orpolymethylpentene(PMP)are satisfactory.NOTE1Plastic volumetric flasks change dimension as they age andtherefore must be recalibrated periodically.6.2 Spectrometer Modified Czerny-Turner,using anEchelle grating with 30 prism for order separation providinga reciprocal linear dispersion of about 0.1 nm/mm in the 80 to85th order.The
