电磁流量计选型时经常要考虑内衬和电极的选择

《电磁流量计选型时经常要考虑内衬和电极的选择》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。

1、ChemicalResistanceChartIntroductionCorrosionanddegradationdependonmanyparameters:•Temperature•Pressure•Concentration•Impurities•pH-value•Materialsandsurfacescharacteristics•Joinings(e.gweldings,soldering)•MechanicalstressofmaterialsDuetothemanyparameter

2、sinfluencingtheprocessthecorrosiontablecanonlybeusedasguidanceanddonotalwaysapplytotheactualprocessconditionsattheend-user.Thusthefinalresponsibilityofmaterialselectionresideswiththeuserwhoknowsthespecificprocessconditions.Thedatapresentedinthisguideisb

3、asedonpublisheddataandfieldexperience.DisclaimerSiemensFlowInstrumentscanprovideassistancewiththeselectionofsensorpartsincontactwiththemedia.However,thefullresponsibilityfortheselectionrestswiththecustomerandSiemensFlowInstrumentscantakenoresponsibility

4、foranyfailureduetomaterialincompatibility.HowtousethisguideThenamesofthechemicalsarelistedinalphabeticorder.Thetableisvalidforpurechemicalsat20°Cwherenothingelseisstated.ResistanceTabels©SiemensAG2008ChemicalResistanceChartforSITRANSFMNOTE!Thetableisval

5、idforpuresolutionsat20°Cwherenothingelseisstated.Highresistance+Moderateresistance0Noresistance-ChemicalsA-IPlasticsandrubbersCeramicsMetalsPTFEPFAEPDMNBRNeopreneEboniteLinatexFKM/FPMPVDFZirconiumAluminiumAISITitaniumTantalumHastelloyHastelloyHastelloyP

6、latinum*MonelGraphiteoxide(ZrO2)oxide(AL2O3)*316C4C22C276Aceticacid30%CH3COOH+++o++o-++++++++++o-AceticacidGlacialCH3COOH100%+++--+o-++++++++++oAluminiumchlorideAlCl3+++++++++++-+++++++-AluminiumnitrateAl(NO3)3+++++++++++++++++++-AluminiumsulphateAl2(SO

7、4)3+++++++++++++++++++-AmmoniumbromideNH4Br+++++++++++++-AmmoniumchlorideNH4Cl+++++++++++++++++++-AmmoniumfluorideNH4F++++o++++ooo--+++++-AmmoniumhydroxideNH4OH++-++oo+++++o++++-AmmoniumnitrateNH4NO3++++o+++++++o+++++--Ammoniumsulphate(NH4)2SO4++++o++o+

8、++++++++++-AnilineC6H5NH2+++--+o+++++++++++++AquaRegiaHCl/HNO3(3:1)++---o--+++-o+------ArsenicacidAsH3O4++++++++++++++++++oBariumchlorideBaCl2+++++++++++++++++++-BariumhydroxideBa(OH)2+++++++++++++o+++++Beer+++++++++++++++++++Ben