【英文标准名称】:StandardTestMethodsforCorrosivityofWaterintheAbsenceofHeatTransfer(WeightLossMethods)
【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】:ASTMD2688-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【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】:磨损;试验;腐蚀;水;金属;侵蚀腐蚀
【英文主题词】:coolingwatercorrosiontest;couponcorrosiontest;distributionwatercorrosiontestmethod
【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.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Z16
【国际标准分类号】:13_060_60
【页数】:7P.;A4
【正文语种】: