基本信息
标准名称: | 尼罗罗非鱼配合饲料营养标准 |
英文名称: | Standard of nutrients in formula diet for nile tilapia |
中标分类: |
农业、林业 >>
水产、渔业 >>
渔业饲料 |
替代情况: | 被SC/T 1025-2004代替 |
发布日期: | 1998-06-11 |
实施日期: | 1999-01-01 |
首发日期: | 1900-01-01 |
作废日期: | 2005-02-01 |
起草单位: | 中国水产科学研究院长江水产研究所 |
出版社: | 中国标准出版社 |
出版日期: | 2004-04-19 |
页数: | 5页 |
书号: | 155066.2-12763 |
适用范围
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前言
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目录
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引用标准
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所属分类: 农业 林业 水产 渔业 渔业饲料
【英文标准名称】:StandardTestMethodforRepassivationPotentialofAluminumandItsAlloysbyGalvanostaticMeasurement
【原文标准名称】:用恒电流测量铝及其合金的再钝化电位的标准试验方法
【标准号】:ASTMD6208-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:D15.06
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:铝;铝合金;腐蚀;钝化;斑蚀;测试
【英文主题词】:aluminum;corrosion;electrochemicalmeasurement;galvanostatic;localizedcorrosion;polarization
【摘要】:Thistestmethodisdesignedtomeasuretherelativeeffectivenessofinhibitorstomitigatepittingcorrosionofaluminumanditsalloys,inparticularAA3003-H14,rapidlyandreproducibly.Themeasurementsarenotintendedtocorrelatequantitativelywithothertestmethodvaluesorwithsusceptibilitytolocalizedcorrosionofaluminumobservedinservice.Qualitativecorrelationofthemeasurementsandsusceptibilityinservicehasbeenestablished(1).Themaximumpotentialreacheduponinitialpolarization,EB,isameasureoftheresistancetobreakdownofthealuminumoxidefilm.Lowersusceptibilitytoinitiationofpittingcorrosionisindicatedbyamorenoblepotential(SeePracticeG3andTerminologyG15.)Thispotential,asmeasuredinthistestmethod,isnotverysensitivetotheinhibitorspresent.Theminimumpotential,EG,followingthemaximumpotentialisameasureoftheprotectionagainstcontinuedpittingcorrosionbytheinhibitors.Again,amorenoblepotentialindicatesbetterprotection.Thispotentialissensitivetotheinhibitorspresent.Visualexaminationofthespecimenscanprovideinformationaboutsubletiesofthepittingandinhibitionmechanisms.Numberofpits,pitdepth,amountofdeposit,andsurfacediscolorationaresomeexamplesofrecordableobservations,whichcanassistevaluationofinhibitoreffectiveness.Thepresenceofchlorideinthetestsolutioniscriticaltoobservationofpittingcorrosion.Also,acoolant/corrosivewatersolutioninwhichgasbubblesevolvespontaneouslyonthealuminum(indicatinggeneralcorrosion)isunlikelytohaveasignificantamountofobservablepittingcorrosion.1.1Aproceduretodeterminetherepassivationpotentialofaluminumalloy3003-H14(UNSA93003)(1)asameasureofrelativesusceptibilitytopittingcorrosionbyconductingagalvanostaticpolarizationisdescribed.Aprocedurethatcanbeusedtocheckexperimentaltechniqueandinstrumentationisdescribed,aswell.1.2Thetestmethodservesasaguideforsimilarmeasurementonotheraluminumalloysandmetals(2-5).1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Valuesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H61
【国际标准分类号】:77_150_10
【页数】:6P.;A4
【正文语种】: