基本信息
标准名称: | 纤维缠绕增强塑料环形试样拉伸试验方法 |
英文名称: | Test method for tensile strength of ring of filament- winding reinforced plastics |
中标分类: |
建材 >>
建材产品 >>
纤维增强复合材料 |
ICS分类: |
橡胶和塑料工业 >>
增强塑料
|
替代情况: | 替代GB 1458-1978;被GB/T 1458-2008代替 |
发布部门: | 国家技术监督局 |
发布日期: | 1978-09-20 |
实施日期: | 1989-06-01 |
首发日期: | 1978-11-04 |
作废日期: | 2009-04-01 |
主管部门: | 中国建筑材料工业协会 |
提出单位: | 全国纤维增强塑料标准化技术委员会 |
归口单位: | 全国纤维增强塑料标准化技术委员会 |
起草单位: | 国家建筑材料工业局哈尔滨玻璃钢研究所 |
起草人: | 陶云宝、林国荣、张根荣 |
出版社: | 中国标准出版社 |
出版日期: | 1989-06-01 |
页数: | 6页 |
适用范围
本标准规定了纤维缠绕增强塑料环形试样的拉伸试验方法。
本标准适用于测定纤维缠绕增强塑料环形试样的拉伸强度及其中纤维的拉伸强度。
前言
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目录
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引用标准
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所属分类: 建材 建材产品 纤维增强复合材料 橡胶和塑料工业 增强塑料
【英文标准名称】:StandardTestMethodforMonitoringAtmosphericCorrosionTestsbyElectricalResistanceProbes
【原文标准名称】:用电阻试样监测大气腐蚀试验的试验方法
【标准号】:ASTMB826-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:B02.11
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:atmosphericcorrosionmonitor;atmosphericcorrosiontesting;corrosivitymonitor;electricalresistanceprobe;environmentaltest;mixedflowinggastest;resistancemonitorprobe;Atmosphericcorrosionanalysis;Corrosivegastesting;Corrosivitymonito
【摘要】:Corrosivitymonitoringoftestenvironmentsprovidesameanstomonitoranintegratedvalueoftestcorrosivitywhichcannotbeevaluatedfromtestparametersthemselves,suchastemperature,humidity,andgasconcentration.Assuchthemonitorvaluecanbeusedforspecificationpurposessuchastestvalidation.Electricalresistancemonitoringofconductorsexposedtocorrosivemediaisawell-establishedpractice.,,,Theresistancemethodassumesuniformcorrosionovertheentiresurfaceoftheexposedmetalconductorsegment.Localcorrosionsuchaspitting,crevice,orgrainboundarycorrosionmayprovideinvalidestimatesoftestcorrosivity.Markedchangesinslopeofthecurveofelectricalresistanceratioversustimemayindicateundesiredprocesseswhichcanbeduetodeficienciesinthetestatmosphereorinthemonitoritself.BecauseoflimitationsofthediffusionprocesswithinthecorrosionproductformedonthemetalconductorsegmentoftheRMprobewhenpassivatingcorrosionfilmsareformed,resistancemonitoringmaynotbeusefulfortestchambermonitoringpurposesforverylongtestexposures.ChambermonitoringisdependentondetectingchangesintherateofcorrosionoftheRMasanindicatorsignalthatspecifiedgasconcentrationsmustbereverified.However,lowcorrosionrateslimittheabsolutevalueoftherateofchangeofcorrosionratewithchangeoftestconditions;forparabolicfilmgrowthprocesses,thegrowthratedecreaseswithtimelimitingthesensitivityoftheRMatextendedtesttimes.SincecorrosionratecanbeacomplexfunctionoftestparametersinMFGtestswithanygivenmetalprimarilyresponsivetoasubsetofthegasesintheMFGenvironment,morethanonetypemetalresistanceprobeisrequiredinordertoassistinmaintenanceofrelativegasconcentrations.Forsuchtestspecifications,valuesofresistanceratiosmustbereferredtoratiosobtainedunderknowntestconditionsassuppliedbythetestspecifier.Informationrelatingtothesensitivityofvariousmetalstovariouscorrodantshasbeenpublished.,RMprobescanbeusefulfrom1%ofthicknessconsumedupwardto50%ofthicknessconsumedbythecorrosionfilmgrowth.Conductorthicknessesbetween25nmand0.2mmhavebeenreportedandcommonsizesareavailablecommercially.1.1Thistestmethodprovidesameansformonitoringcorrosivityofenvironmentalteststhatinvolveexposuretocorrosivegases.1.2Thistestmethodusesaresistancemonitor(RM)probefabricatedfromachosenmetalconductor,withoneconductorsegmentuncoveredtopermitexposureofthechosenmetalconductortothecorrosivegasmixtureandthesecondconductorsegmentcoveredtoprotectthemetalconductorofthissegmentfromdirectattackbythecorrosivegasmixture.Thecoveredconductorsegmentprovidesareferenceforevaluatingchangesintheuncoveredsegment.Theratiooftheresistanceoftheexposedsegmenttothatofthecoveredsegmentprovidesameasureoftheamountofmetalconductorthathasreactedwiththecorrosivegastestenvironmenttoformpoorlyconductingcorrosionproduct,thusprovidingameasureoftestcorrosivity.1.3Resistancemonitoringisapplicabletoabroadrangeoftestconditionsbyselectionoftheappropriatemetalconductorandinitialmetalthickness.1.4ThismethodissimilarinintenttoTestMethodsB808.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithits......
【中国标准分类号】:H25
【国际标准分类号】:77_060
【页数】:4P.;A4
【正文语种】:英语