【英文标准名称】:StandardTestMethodforCorrosivityofWaterintheAbsenceofHeatTransfer(WeightLossMethod)
【原文标准名称】:无热传递条件下水腐蚀性的标准试验方法(重量损失法)
【标准号】:ASTMD2688-2011
【标准状态】:现行
【国别】:
【发布日期】:2011
【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】:D19.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:旁路腐蚀样本机架;冷却水腐蚀试验;腐蚀试验试样;挂片腐蚀试验;配送水腐蚀试验方法;水腐蚀性;失重;线盘测试
【英文主题词】:bypasscorrosionspecimenrack;coolingwatercorrosiontest;corrosiontestspecimen;couponcorrosiontest;distributionwatercorrosiontestmethod;Watercorrosivity;Weightloss;Wirecoiltest
【摘要】:Sincethetwotendenciesareinseparableforametaltocorrodeandforwaterandthematerialsitcontainstopromoteorinhibitcorrosion,thecorrosivenessofamaterialorthecorrosivityofwatermustbedeterminedinrelative,ratherthanabsolute,terms.Thetendencyforamaterialtocorrodeisnormallydeterminedbymeasuringitsrateofcorrosionandcomparingitwiththecorrosionratesofothermaterialsinthesamewaterenvironment.Conversely,therelativecorrosivityofwatermaybedeterminedbycomparingthecorrosionrateofamaterialinthewaterwiththecorrosionratesofthesamematerialinotherwaters.Suchtestsareuseful,forexample,forevaluatingtheeffectsofcorrosioninhibitorsonthecorrosivityofwater.Althoughthistestmethodsisintendedtodeterminethecorrosivityofwater,itisequallyusefulfordeterminingcorrosivenessandcorrosionrateofmaterials.Examplesofsystemsinwhichthismethodmaybeusedincludebutarenotlimitedtoopenrecirculatingcoolingwaterandclosedchilledandhydronicheatingsystems.1.1Thistestmethodcoversthedeterminationofthecorrosivityofwaterbyevaluatingpittingandbymeasuringtheweightlossofmetalspecimens.Pittingisaformoflocalizedcorrosion:weightlossisameasureoftheaveragecorrosionrate.Therateofcorrosionofametalimmersedinwaterisafunctionofthetendencyforthemetaltocorrodeandisalsoafunctionofthetendencyforwaterandthematerialsitcontainstopromote(orinhibit)corrosion.1.2Thetestmethodemploysflat,rectangular-shapedmetalcouponswhicharemountedonpipeplugsandexposedtothewaterflowinginmetalpipinginmunicipal,building,andindustrialwatersystemsusingasidestreamcorrosionspecimenrack.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard,otherunitsValuesgiveninparenthesisareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:
【国际标准分类号】:13_060_60
【页数】:7P.;A4
【正文语种】:


【英文标准名称】:InterchangeRollsofPerforatedTapeforInformationInterchange
【原文标准名称】:信息互换用穿孔带的互换纸卷
【标准号】:ANSIX3.34-1972
【标准状态】:现行
【国别】:美国
【发布日期】:1972
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:情报系统;穿孔带;信息交换;辊子
【英文主题词】:informationsystems;rolls;punchedtapes;informationinterchange
【摘要】:Describesconventionsforrolled-up,perforatedtapeswhichareusedfortheinterchangeofinformation.Thisstandarddefinesandappliestointerchangerollsoftapenotcontainedonreels,itdoesnotprecludetheinterchangeoftapeswoundontake-upreels.
【中国标准分类号】:L64
【国际标准分类号】:
【页数】:8P.;A4
【正文语种】:英语