【英文标准名称】:StandardPracticesforEvaluatingtheResistanceofPlasticstoChemicalReagents
【原文标准名称】:塑料耐化学试剂性能的标准实施规程
【标准号】:ASTMD543-2006
【标准状态】:现行
【国别】:
【发布日期】:2006
【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】:D20.50
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:化学试剂;耐化学性;塑料;试验
【英文主题词】:chemicalreagent;dimensionalchanges;exposure;mechanicalpropertychanges;plastics;stress
【摘要】:Thelimitationsoftheresultsobtainedfromthesepracticesshouldberecognized.Thechoiceoftypesandconcentrationsofreagents,durationofimmersionorstress,orboth,temperatureofthetest,andpropertiestobereportedisnecessarilyarbitrary.Thespecificationoftheseconditionsprovidesabasisforstandardizationandservesasaguidetoinvestigatorswishingtocomparetherelativeresistanceofvariousplasticstotypicalchemicalreagents.Correlationoftestresultswiththeactualperformanceorserviceabilityofplasticsisnecessarilydependentuponthesimilaritybetweenthetestingandtheend-useconditions.Forapplicationsinvolvingcontinuousimmersion,thedataobtainedinshort-timetestsareofinterestonlyineliminatingthemostunsuitablematerialsorindicatingaprobablerelativeorderofresistancetochemicalreagents.Evaluationofplasticsforspecialapplicationsinvolvingcorrosiveconditionsshouldbebasedupontheparticularreagentsandconcentrationstobeencountered.Theselectionoftestconditionsshouldtakeintoaccountthemanneranddurationofcontactwithreagents,thetemperatureofthesystem,appliedstress,andotherperformancefactorsinvolvedintheparticularapplication.1.1Thesepracticescovertheevaluationofallplasticmaterialsincludingcast,hot-molded,cold-molded,laminatedresinousproducts,andsheetmaterialsforresistancetochemicalreagents.Thesepracticesincludeprovisionsforreportingchangesinweight,dimensions,appearance,andstrengthproperties.Standardreagentsarespecifiedtoestablishresultsonacomparablebasis.Provisionsaremadeforvariousexposuretimes,stressconditions,andexposuretoreagentsatelevatedtemperatures.Thetypeofconditioning(immersionorwetpatch)dependsupontheend-useofthematerial.Ifusedasacontainerortransferline,specimensshouldbeimmersed.Ifthematerialwillonlyseeshortexposuresorwillbeusedincloseproximityandreagentmaysplashorspillonthematerial,thewetpatchmethodofapplyingreagentshouldbeused.1.2Theeffectofchemicalreagentsonotherpropertiesshallbedeterminedbymakingmeasurementsonstandardspecimensforsuchtestsbeforeandafterimmersionorstress,orboth,ifsotested.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninbracketsareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecifichazardsstatementsaregiveninSection7.Note1ThisstandardandISO22088Part3addressthesamesubjectmatter,butdifferintechnicalcontent(andtheresultscannotbedirectlycomparedbetweenthetwotestmethods).
【中国标准分类号】:G30
【国际标准分类号】:83_080_01
【页数】:7P.;A4
【正文语种】:
基本信息
| 标准名称： | 镍包铬复合粉 |
| 英文名称： | Nickel-coated chromium composite powers |
| 中标分类： |
冶金 >>
粉末冶金 >>
金属与合金粉末 |
| 替代情况： | 原标准号GB/T 3992-1983 |
| 发布日期： | 2006-07-27 |
| 实施日期： | 2006-10-11 |
| 首发日期： | |
| 作废日期： | |
| 出版社： | 中国标准出版社 |
| 出版日期： | 2006-10-11 |
| 页数： | 3页 |
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： 冶金 粉末冶金 金属与合金粉末