基本信息
| 标准名称： | 天然生胶 蓖麻油含量的测定 第2部分:总蓖麻油酸含量的测定 气相色谱法 |
| 英文名称： | Rubber raw natural---Determination of castor oil content Part 2: Determination of total ricinoleic acid content by gas chromatography |
| 中标分类： |
农业、林业 >>
林业 >>
林产化工原料 |
| ICS分类： |
橡胶和塑料工业 >>
橡胶
|
| 发布日期： | 2007-12-18 |
| 实施日期： | 2008-03-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | |
| 页数： | 7 |
适用范围
本部分规定了天然生胶总蓖麻油酸含量的测定---气相色谱法。 本部分适用于所有级别的天然橡胶。
前言
没有内容
目录
没有内容
引用标准
没有内容
所属分类： 农业 林业 林业 林产化工原料 橡胶和塑料工业 橡胶
【英文标准名称】:StandardTestMethodforEvaluatingStress-CorrosionCrackingofStainlessAlloyswithDifferentNickelContentinBoilingAcidifiedSodiumChlorideSolution
【原文标准名称】:沸腾酸化氯化钠溶液中不同镍合量不锈钢合金应力腐蚀裂纹评定的标准试验方法
【标准号】:ASTMG123-2000(2005)
【标准状态】:现行
【国别】:
【发布日期】:2000
【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】:G01.06
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:弯曲样品;玻璃器皿;镍含量;不锈钢;钢;应力;应力腐蚀;试验
【英文主题词】:boilingacidifiedsodiumchloride(NaCl);glassware;histograms;stresscorrosioncracking;U-bendspecimens;UNSN
【摘要】:Thistestmethodisdesignedtocomparealloysandmaybeusedasonemethodofscreeningmaterialspriortoservice.Ingeneral,thistestmethodismoreusefulforstainlesssteelsthantheboilingmagnesiumchloridetestofPracticeG36.Theboilingmagnesiumchloridetestcracksmaterialswiththenickellevelsfoundinrelativelyresistantausteniticandduplexstainlesssteels,thusmakingcomparisonsandevaluationsformanyserviceenvironmentsdifficult.Thistestmethodisintendedtosimulatecrackinginwater,especiallycoolingwatersthatcontainchloride.Itisnotintendedtosimulatecrackingthatoccursathightemperatures(greaterthan200x00B0;Cor390x00B0;F)withchlorideorhydroxide.Note18212;Thedegreeofcrackingresistancefoundinfull-immersiontestsmaynotbeindicativeofthatforsomeserviceconditionscomprisingexposuretothewater-lineorinthevaporphasewherechloridesmayconcentrate.Correlationwithserviceexperienceshouldbeobtainedwhenpossible.Differentchlorideenvironmentsmayrankmaterialsinadifferentorder.Ininterlaboratorytesting,thistestmethodcrackedannealedUNSS30400andS31600butnotmoreresistantmaterials,suchasannealedduplexstainlesssteelsorhighernickelalloys,forexample,UNSN08020(forexample20Cb-34stainless).ThesemoreresistantmaterialsareexpectedtocrackwhenexposedtoPracticeG36asU-bends.MaterialswhichwithstandthissodiumchloridetestforalongerperiodthanUNSS30400orS31600maybecandidatesformoresevereserviceapplications.TherepeatabilityandreproducibilitydatafromSection12andAppendixX1mustbeconsideredpriortouse.Interlaboratoryvariationinresultsmaybeexpectedasoccurswithmanycorrosiontests.Acceptancecriteriaarenotpartofthistestmethodandifneededaretobenegotiatedbytheuserandtheproducer.1.1Thistestmethoddescribesaprocedureforconductingstress-corrosioncrackingtestsinanacidifiedboilingsodiumchloridesolution.Thistestmethodisperformedin25%(bymass)sodiumchlorideacidifiedtopH1.5withphosphoricacid.Thistestmethodisconcernedprimarilywiththetestsolutionandglassware,althoughaspecificstyleofU-bendtestspecimenissuggested.1.2ThistestmethodisdesignedtoprovidebettercorrelationwithchemicalprocessindustryexperienceforstainlesssteelsthanthemoresevereboilingmagnesiumchloridetestofPracticeG36.SomestainlesssteelswhichhaveprovidedsatisfactoryserviceinmanyenvironmentsreadilycrackinPracticeG36,buthavenotcrackedduringinterlaboratorytestingusingthissodiumchloridetestmethod.1.3Thisboilingsodiumchloridetestmethodwasusedinaninterlaboratorytestprogramtoevaluatewroughtstainlesssteels,includingduplex(ferrite-austenite)stainlessandanalloywithuptoabout33%nickel.Itmayalsobeemployedtoevaluatethesetypesofmaterialsinthecastorweldedconditions.1.4Thistestmethoddetectsmajoreffectsofcomposition,heattreatment,microstructure,andstressonthesusceptibilityofmaterialstochloridestress-corrosioncracking.Smalldifferencesbetweensamplessuchasheat-to-heatvariationsofthesamegradearenotlikelytobedetected.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandard......
【中国标准分类号】:H40
【国际标准分类号】:77_060
【页数】:10P.;A4
【正文语种】: