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431201402SURFACETECHNOLOGY2013-08-122013-09-16Received2013-08-12Revised2013-09-16Q201225082009YB015FundSupportedbyEducationFundoftheHubeiProvinceDepartmentQ20122508andFundofHubeiUniversityofArtsandScience2009YB0151972—。BiographyHUANGLin1972—FemalefromJingzhouHubeiMasterLecturerResearchfocusprotectionofmaterials.441053考察在模拟海水中,钨酸钠及其与月桂酰肌氨酸钠复配物对Q235钢的缓蚀性能。进行挂片失重法实验,研究缓蚀剂添加量对缓蚀效率的影响;测定电化学极化曲线及阻抗谱,对比单一钨酸钠缓蚀剂与复配缓蚀剂的缓蚀效率以及相关拟合数据。钨酸钠单独使用时的缓蚀效果良好,缓蚀效率随着添加量的增加而增大,且在碳钢表面的吸附符合修正了的Langmuir吸附模型;与月桂酰肌氨酸钠复配后,缓蚀效率更高,阴极、阳极的塔菲尔斜率均减小,腐蚀电流密度也降低了很多。钨酸钠与月桂酰肌氨酸钠复配后比单独使用效果更好,二者有较好的协同缓蚀增效作用;复配缓蚀剂为混合型缓蚀剂。钨酸钠;协同效应;缓蚀剂;月桂酰肌氨酸钠TG174.42A1001-3660201401-0025-05CorrosionInhibitionPerformancesofSodiumTungstateandItsCompositeforCarbonSteelinSimulatedSeawaterHUANGLinXUXiang-eWANGWan-qiangDepartmentofChemicalEngineeringHubeiUniversityofArtsandScienceXiangyang441053ChinaABSTRACTObjectiveToinvestigatethecorrosioninhibitionperformancesofsodiumtungstateandthesodiumtungstate-SLScompositeonQ235steelinsimulatedseawater.MethodsEffectsofinhibitoradditionsonthecorrosioninhibitionefficiencywerestudiedusingweightlossoftestedpieces.Basedontheelectrochemicalpolarizationcurveandimpedancetesttheinhibitioneffi-cienciesandrelatedfittingdataofsodiumtungstateinhibitorwhenusedaloneorincombinationwerecompared.ResultsSodiumtungstatewasagoodinhibitorforcarbonsteelinsimulatedseawaterandtheinhibitionefficiencyincreasedwiththeincreasingin-hibitorconcentrationandtheadsorptionofsodiumtungstateontothesurfaceofcarbonsteelfollowedtheamendedLangmuirad-sorptionisothermequation.CompoundinhibitorshadhigherefficiencywithlowerTafelslopeonthecathodeandanodeandsignifi-cantlyreducedcorrosioncurrentdensity.ConclusionCompositeofsodiumtungstateandSLShadbettercorrosionperformancethanthatofsodiumtungstatealonewhichshowedexcellentsynergisticeffect.Compoundinhibitorwasamixed-typeinhibitor.KEYWORDSsodiumtungstatesynergisticeffectcorrosioninhibitorsodium-lauroylsarcosinate·52·201402。、1—3。、、。SLS。11.1SLS、、。3.5%。Q235。72mm×11.2mm×2mm0.9cm、1cm。1.2JPT-10。200400600→→→。。0.0001g0.02mm。45℃。。48h412h。V=m0-m1ρ·A·tm0m1、gAcm2thρ7800kg/m3。η=V0-V1/V0×100%V0V1。1.3Tafel。Q235。、、。Solartron-1287Solar-tron-1260Solartron。Zplot2.1100kHz~0.01Hz10mV。Zview2.1。30min。Tafelη=J0-J1/J0×100%J0J1A/cm2。η=Rp1-Rp0/Rp1×100%Rp0Rp1Ω。22.11。11800mg/L79.2%。1Fig.1Effectofsodiumtungstateadditionamountoninhibitionefficiency·62·431100mg/L600mg/LCl-11200mg/L。5—6。SLS。SLS1。1SLSTab.1Inhibitionefficiencyofthesodiumtungstate-SLScomposite/mg·L-1SLSVcorr/mm·a-1/%001.5200401.13825.1600400.23784.4600600.18188.1600800.11592.46001000.08794.36001200.06895.51SLS40mg/LSLS600mg/L62%84.4%。120mg/LSLS95.5%0.068mm/aGB50050—2007《》0.075mm/a。SLSSLSSLS60mg/L。SLS、Cl-。2.22。Langmuircη=hK+hchKc。2c/η-cFig.2Fittingstraightlineofc/η-caftersodiumtungstateaddi-tioninsimulatedseawater2R=0.999451Q235Langmuir。c/η=307.117+1.09105cK=1043.7L/mol。ΔG0ads=-RTln55.5KΔG0ads=-27.25kJ/mol、7—8。20kJ/mol≤|ΔG0|≤42kJ/mol9。Robertson。WO42-10—11。2.32.3.1Tafel600mg/L+120mg/LSLS1mV/s-300~+300mV45℃3。3Cview2.12。3。2、bcba·72·20140212。3Q235TafelFig.3TafelcurvesofQ235steel2TafelTab.2FittedparametersofTafelcurvesba/mVbc/mVJcorr/A·cm-2Ecorr/mV/%141.9-493.81.94×10-4-69294.1-224.69.49×10-6-59195.132“”113。。。2.3.24Q235Nyquist。53RpCPERs14。415—16。。43。4Q235NyquistFig.4NyquistplotsforQ235steelindifferentcorrosivemediums5Fig.5Equivalentcircuitofthecorrosionsystem3EISTab.3FittedparametersofEISplotsRp/Ω·cm2CPE-T/μF·cm-2CPE-PRs/Ω·cm2/%121.50.000470.7472.05600mg/L401.60.000680.5791.2969.7600mg/L+120mg/LSLS29890.000790.5805.7695.931Q235。Langmuir。2SLS。600mg/L120mg/LSLS95%0.075mm/a。1.M.·82·4311993.ZHOUBen-sheng.CorrosionandProtectionofHeavyMetalinIndustrialCoolingWaterSystemM.Xi'anXi'anElec-tronicsScienceandTechnologyUniversityPublishingHouse1993.2.J.2013254331—333.WANGWei-zhenGAOXiangGAOLi-lietal.ResearchProgressonSeawaterCirculatingCoolingSystemofEnviron-mentalFriendlyCorrosionInhibitorsofMildSteelJ.Cor-rosionScienceandProtectionTechnology2013254331—333.3.J.20131021—3.CHENXiang-fengMUZhen-junXUChun-sheng.etal.ResearchonCorrosionRuleofCopperandCopperAlloyintheWatersofXiamenMarineJ.EquipmentEnvironmen-talEngineering20131021—3.4.D.200536—40.HUANGLin.StudyofEnvironment-friendlyCorrosionIn-hibitorforDrillToolinSaltwaterDrillingFluidsD.Nan-jingNanjingUniversityofTechnology200536—40.5GHAREBASOMANOVICS.Interactionof12-aminodode-canoicAcidwithaCarbonSteelSurfaceTowardstheDe-velopmentof'Green'CorrosionInhibitorsJ.CorrosionSci-ence20105262104—2113.6.J.200534333—35.XUChun-chunHEHai-ping.SynergisticInhibitionEffectofTungstateandSodiumDodecylBen-zeneSulfateJ.SurfaceTechnology200534333—35.7.Q235J.201039348—51.YUHui-huaZHANGJingDUMin.InhibitionPerformanceofCompoundInhibitorofImidazolinePhosphateforQ235SteelJ.SurfaceTechnology201039348—51.8.J.201241525—29.HUANGKai-hongZHOUKunRUIYu-lan.TheCorrosionInhibitionofTryptophanandItsCompoundforCarbonSteelinH2SO4SolutionJ.SurfaceTechnology201241525—29.9.2-J.2012292209—215.LIXiang-hongDENGShu-duanFUHui.CorrosionInhibi-tionof2-Aminopyrimidinefor
本文标题:钨酸钠及其复配缓蚀剂在模拟海水中对碳钢的缓蚀性能-黄琳
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