304酸洗板表面发黑原因分析

36120144JournalofUniversityofScienceandTechnologyBeijingVol．36Suppl．1Apr．2014304陈培敦1，2)，汤旭炜1)，李超1)，张爽2)，吴月龙2)11000832271100[e-mail]304A、C．、304．．304．304Analysisofcausesforsurfacetarnishingof304picklingplateCHENPei-dun12TANGXu-wei1LIChao1ZHANGShuang2WUYue-long21SchoolofMetallurgicalandEcologicalEngineeringUniversityofScienceandTechnologyBeijingBeijing100083China2ShandongTaishanIronandSteelGroupCo．Ltd．Laiwu271100China[e-mail]AandtypeCdeterminedbymetallo-graphicanalysis．Seriousintergranularcorrosionwasfoundinsurfacetarnishing304plateafterannealingandpickling．Aftersolutiontreatmentandpicklingtesttheamountofferritedecreasessignificantlylittlecarbideprecipitationhappensandsurfacetarnishingphenomenondecreases．Theresultshowsthattheimproperannealingresultsincarbideenrichmentonthegrainboundaryandsensitiza-tionofmaterialwhichleadtointergranularcorrosionwhenpicklingandthensurfacetarnishingof304picklingplate．KEYWOＲDS304picklingplatecarbidesolutiontreatment2013--11--18DOI10．13374/j．issn1001--053x．2014．s1．040http//journals．ustb．edu．cn304、．、、．13041．1304．1304Table1Chemicalcompositionof304picklingplate%CSiMnPSCrNiGB/4237—2007≤0.08≤0.75≤2.0≤0.045≤0.0318～208.0～10.50.0320.390.8950.0420.02218.228.071304304304、、．22.11304．13041#2#．2.22.2.12、2A、CA2.0、C3.0．2.2.23．1304a304bFig．1Contrastpicturesbetweensurfacetarnishing304picklingplateaandnormal304picklingplateb2．aAbCFig．2MorphologyofinclusionainclusionoftypeAbinclusionoftypeC2Table2Ｒatingtableofnon-metalinclusionABCDDS2.0!0.5!3.0…………3、3041#2#4+5．1．2．·912·363a1#b2#Fig．3Contrastpictureofintergranularcorrosionbetweentheblackboarda1#andthewhiteboardb2#4Fig．4Substratestructure5Fig．5Stateofthegrainboundary2.3、304633．3Table3Ｒesultofmicro-areacompositionanalysisofthesurfaceinterg-ranularcorrosion%OCrFeNi14.0821.3866.767.7810024.2818.8868.448.401004.1820.1367.608.091006Fig．6Correspondingpointofmicro-areacompositionanalysisofthesurfaceintergranularcorrosion2.42--3．3041050℃10min3%HF10%HNO3．7～9．7Fig．7Contrastpicturesofpicklingplatebetweenbeforeandafterso-lutionheattreatment7～9、+1000·022·13048Fig．8Substratestructure9Fig．9Stateofthegrainboundary．．．3、3041#2#3--4．304．1050℃、10min．304．304．、、5--7．4304．．1ZhangGYWuQF．Influenceofsolutiontreatmenttemperatureonsensitizationof304austeniticstainlesssteel．CorrosProtect2012338695．304．20123386952ZhangJY．Ｒesearchofintergranularcorrosionof304austeniticstainlesssteel．EquipManufTechnol20122154．304．201221543LuoHGongM．Intergranularcorrosionofausteniticstainlesssteel．CorrosSciProtectTechnol2006185357．．20061853574QinLYZhangSLSongSZ．Ｒesearchofintergranularcorro-sionsensitizationtemperatureoftypicalstainlesssteel．JChinSocCorrosProtect20062611．．200626115HuangYH．Mechanismandpreventionmeasuresofausteniticstainlessintergranularcorrosion．ChinaSciTechnolInf20061688．．200616886MaZC．Causeandtreatmentofausteniticstainlessintergranularcorrosion．LightIndSciTechnol2012435．．20124357ZhengHS．Ｒesearchandpreventionofausteniticstainlessinterg-ranularcorrosion．JMachDev200433146．．200433146·122·