【英文标准名称】:StandardPracticeforExposingandEvaluatingMetalsandAlloysinSurfaceSeawater
【原文标准名称】:金属及合金在海水表面暴露与评定的标准实施规范
【标准号】:ASTMG52-2000(2006)
【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】:G01.09
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:evaluationandreporting;exposureconditions;foulingtests;specimenpreparation;surfaceseawatercorrosiontests;testracks
【摘要】:Theproceduresdescribedhereinarerecommendedforevaluatingthecorrosionormarinefoulingbehavior,orboth,ofmaterialsexposedtoquiescentorlocaltidalflowconditions,orboth.4.1.1Thispracticeisnotintendedtocovertheinfluenceofhighseawatervelocityorthebehaviorofmaterialsinseawaterwhichhasbeentransportedfromitssource.4.1.2Someaspectsofthispracticemaybeapplicabletotestingintanksandtroughswhicharecontinuouslyprovidedwithfreshsurfaceseawater.Additionally,someaspectsmayalsobeapplicabletodeepoceantesting.Note18212;GuideG78providesguidanceforconductingcrevicecorrosiontestsundercontrolledseawatertestconditions.Whilethedurationoftestingmaybedictatedbythetestobjectives,exposuresofmorethansixmonthsoroneyeararecommonlyusedtominimizetheeffectsofenvironmentalvariablesassociatedwithseasonalchangesorgeographiclocation,orboth.Theproceduresdescribedareapplicablefortheexposureofsimpletestpanels,weldedtestpanels,orthoseconfiguredtoassesstheeffectsofcrevices,orboth,suchasthosedescribedinGuideG78.Inaddition,theyareusefulfortestingofactualcomponentsandfabricatedassemblies.Itisprudenttoincludecontrolmaterialswithknownresistancetoseawatercorrosionorfouling,orboth,asdescribedinTestMethodD3623.Note28212;MaterialswhichhavebeenincludedinASTMWorldwideSeawaterCorrosivityStudiesincludeUNSK01501(carbonsteel),UNSC70600(90/10CuNi)andUNSA95086(5086-H116Al).24Note38212;Inthecaseofevaluationsofaluminumalloys,careshouldbeexercisedinthelocationofspecimensnearcopperorhighcopper-containingalloys.Insomeinstances,itisnotsufficienttosimplyelectricallyisolatespecimenstopreventbi-metallic(galvanic)corrosion;copperionsfromnearbycorrodingcopperorcopper-basealloyscandepositonaluminumandaccelerateitscorrosion.1.1Thispracticecoversconditionsfortheexposureofmetals,alloys,andothermaterialsinnaturalsurfaceseawatersuchasthosetypicallyfoundinbays,harbors,channels,andsoforth,ascontrastedwithdeepoceantesting.Thispracticecoversfullimmersion,tidalzoneandrelatedsplash,andsprayzoneexposures.1.2Thispracticesetsforthgeneralproceduresthatshouldbefollowedinconductingseawaterexposuretestssothatmeaningfulcomparisonsmaybemadefromonelocationtoanother.1.3Thispracticeidentifiesrecommendedproceduresforevaluatingtheeffectsofnaturalsurfaceseawateronthematerialsexposed.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【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】:
基本信息
标准名称: | 货车二轴转向架设计参数 |
中标分类: |
铁路 >>
机车车辆通用标准 >>
走动部分 |
发布日期: | 1985-12-31 |
实施日期: | 1987-01-01 |
首发日期: | |
作废日期: | 2010-12-02 |
提出单位: | 四方车辆研究所 |
归口单位: | 四方车辆研究所 |
起草单位: | 齐齐哈尔车辆工厂 |
起草人: | 潘绍春、朱公然、陈全生、田序山 |
出版社: | 中国铁道出版社 |
出版日期: | 1987-01-01 |
页数: | 2页 |
适用范围
本标准适用于新设计的标准规矩轨道常规三大件式货车二轴转向架。
前言
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目录
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引用标准
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所属分类: 铁路 机车车辆通用标准 走动部分