【英文标准名称】:StandardPracticeforConductingandEvaluatingLaboratoryCorrosionsTestsinSoils
【原文标准名称】:进行和评价实验室土壤腐蚀试验的标准操作规程
【标准号】:ASTMG162-1999(2004)
【标准状态】:现行
【国别】:
【发布日期】:1999
【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】:G01.10
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:原电池腐蚀;局部腐蚀;埋入土;腐蚀性;土壤腐蚀;地下;腐蚀试验;电解质
【英文主题词】:corrosiontest;corrosivity;electrolyte;localizedcorrosion;galvaniccorrosion;soilburial;soilcorrosion;underground
【摘要】:Thispracticeprovidesacontrolledcorrosiveenvironmentthathasbeenutilizedtoproducerelativecorrosioninformation.Theprimaryapplicationofthedatafromthispracticeistoevaluatemetallicmaterialsforuseinsoilenvironments.Thispracticemaynotduplicateallfieldconditionsandvariablessuchasstraycurrents,microbiologicallyinfluencedcorrosion,non-homogeneousconditions,andlongcellcorrosion.Thereproducibilityofresultsinthepracticeishighlydependentonthetypeofspecimentestedandtheevaluationcriteriaselectedaswellasthecontroloftheoperatingvariables.Inanytestingprogram,sufficientreplicatesshouldbeincludedtoestablishthevariabilityoftheresults.Structuresandcomponentsmaybemadeofseveraldifferentmetals;therefore,thepracticemaybeusedtoevaluategalvaniccorrosioneffectsinsoils(seeGuideG71).Structuresandcomponentsmaybecoatedwithsacrificialornoblemetalcoatings,whichmaybescratchedorotherwiserendereddiscontinuous(forexample,nocoatingontheedgesofmetalstripscutfromawidesheet).Thistestisusefultoevaluatetheeffectofdefectivemetalliccoatings.Structuresandcomponentsmaybecoatedorjacketedwithorganicmaterials(forexample,paintsandplastics),andthesecoatingsandjacketsmayberendereddiscontinuous.Thetestisusefultoevaluatetheeffectofdefectiveorincompletelycoveringcoatingsandjackets.Thecorrosivityofsoilsstronglydependsonsolublesaltcontent(relatedparametersaresoilresistivity,seeTestMethodG57,andchemistry),acidityoralkalinity(measuredbysoilpH,seeTestMethodG51),andoxygencontent(loose,forexample,sand,orcompact,forexample,clay,soilsareextremeexamples).Themanufacturer,supplier,oruser,orcombinationthereof,shouldestablishthenatureoftheexpectedsoilenvironment(s)andselectthetestenvironment(s)accordingly.Multipletypesofsoilcanbeusedtodeterminetheeffectofthisvariable.1.1Thispracticecoversproceduresforconductinglaboratorycorrosiontestsinsoilstoevaluatethecorrosiveattackonengineeringmaterials.1.2Thispracticecoversspecimenselectionandpreparation,testenvironments,andevaluationoftestresults.1.3Thispracticedoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A29
【国际标准分类号】:91_100_01
【页数】:4P.;A4
【正文语种】: