浙江海洋大學(xué)外文翻譯

1、浙江海洋大學(xué)畢業(yè)論文（設(shè)計(jì)）外文翻譯學(xué)院：石化與能源工程學(xué)院專業(yè)：安全工程班級(jí)：A13安工學(xué)號(hào)：學(xué)生姓名指導(dǎo)教師二O年月外文翻譯：原文AdvancedMaterialsResearchVol.710(2013)pp41-44Onlineavailablesince2013/Jun/27at HYPERLINK (2013)TransTechPublications,Switzerlanddoi:10.4028/ HYPERLINK /AMR.710.41 /AMR.710.41CorrosionInhibitionofChloroacetic-AcidModifiedImidazolinefo

2、rQ235SteelinH2SO4SolutionZhaoBin1,2,3,aZouLike2,3,b(1.CollegeofMaterialsandChemicalEngineering,SichuanUniversityofScience&Engineering,China；2.MaterialCorrosionandProtectionKeyLaboratoryofSichuanProvince,China；3.InstituteofFunctionalMaterials,SichuanUniversityofScience&Engineering,China),Keywords:qua

3、ternizedimidazoline;corrosioninhibitors;weightlossmeasurement;polarizationcurveAbstract.Anewchloroacetic-acidmodifiedimidazoline(CAMI)wassynthesizedviathequaternizationofimidazolineintermediate,obtainedfromtheamidationandcyclizationreactionsofbenzoicacidanddiethylenetriamine,withchloroacetic-acid.Th

4、eperformanceofthesynthesizedcompoundCAMIascorrosioninhibitorforQ235carbonsteelin5%sulfuricacidsolutionwasinvestigatedbyweightlossmeasurementandpotentiodynamicpolarizationtechnique.TheresultsshowthatCAMIpossessesstronginhibitiveeffectonthecorrosionofQ235carbonsteelinacidmediumandrestrainsthecorrosion

5、withoutchangingthecathodicandanodiccorrosionmechanismasamixed-typeinhibitor.IntroductionEveryyear,heavylossesarecausedbycorrosionofmetalsinnaturalenvironment,industrialproduction,oilandgasexplorationandproduction.Theapplicationofcorrosioninhibitorsisoneofthemosteffectiveandpracticalmethodsforprotect

6、ionmetalagainstcorrosioninvariouskindsofcorrosionmedium,especiallyinacidicmediaforthatacidsolutionsarewidelyusedinindustry,suchasacidpickling,industrialacidcleaning,aciddescalingandoil-wellcleaning.Themajorityofwell-knowninhibitorsareorganiccompoundscontainingnitrogen,sulfurand/oroxygenatoms1-3.Amon

7、gthevariousorganicinhibitorsusedforinhibitingthecorrosionofmetalinacidmedium,nitrogen-basedorganicinhibitors,imidazolinederivativesattractmuchattentionduingtotheirexcellentinhibitionperformance4.However,mostoftheimidazolinederivativesareinsolubleinwaterandneedtobemodifiedtoimprovetheirwatersolubilit

8、yandcorrosioninhibitionperformance.Inthiswork,anewchloroacetic-acidmodifiedimidazoline(CAMI)wassynthesizedanditseffectivenessandelectrochemicalbehavioronthecorrosionofQ235steelwasstudiedbyweightlossmeasurement,potentiodynamicpolarizationtechnique.ExperimentalworkReagentsandapparatus.Allreagentswerea

9、vailablecommerciallyandusedasreceivedwithoutfurtherpurification.Q235steelwasusedinelectrochemicalandweightlossstudies.TestsolutionswerepreparedbyusingARgradesulfuricacidandtwicedeionizedwater.Aqueoussolutionof5%sulfuricacid(massratio)wasusedasthecorrosivemedium.InfrareddatawasrecordedasKBrdiscsonaNi

10、clet6700FT-IRspectrophotometer.ElectrochemicalmeasurementswerecarriedoutonElectrochemicalsynthesistestsystemLK98C(TianjinLanLiKeChemicalElectronicTechnologyCo.,China).Preparationofimidazolineintermediate.Catalystaluminumoxideandwater-carryingagentxylenewereaddedtothemixtureofbenzoicacidanddiethylene

11、triamine(1:1.2moleratio).Thereactionmixturewasstirredundernitrogenprotectionandheatedto140CandkeptatthisAllrightsreserved.Nopartofcontentsofthispapermaybereproducedortransmittedinanyformorbyanymeanswithou1 temperaturefor3hours,thengraduallyheatedupto200Candheldatthistemperatureuntiltherewasnowaterbe

12、ingcarriedoutbyxylene.Thelight-yellowsolidofimidazolineintermediatewasobtainedwhilethexylene,residualbenzoicacidanddiethylenetriaminewerecompletelyremovedbyvacuumdistillation.COOHCyclizationAmidation140C,-2H2O_+2NHCH2CH2NHCHCH2NH2200OC,-2H2OClCH2COOHC-NHCI|:CH2NHCHjCH2NH260C,QuaternizationCl-Scheme1

13、.PreparationofimidazolineintermediateandCAMIPreparationofimidazolinecorrosioninhibitor(CAMI).Themixtureofobtainedimidazolineintermediatesandchloroaceticacid(1:1.3moleratio)wasstirredat60Cfor3hourstogivethequaternizedimidazolineinhibitor(CAMI).Staticweightlosstest.Theweightlosstestswereperformedonthe

14、metallicsamplesofQ235steelsheetwithdimensionsof2.0cmX1.5cmX0.2cm,whichwerewetabradedwithsiliconcarbidepaperfromnumber200to2000grit,washedwithdeionizedwateranddegreasedwithhexaneandrinsedinisopropanolandacetone.Foreachtest,threecleanedanddriedsampleswereimmersedin5%H2SO4(massratio)solutionwithsetting

15、concentrationofinhibitorCAMIatsettingtemperaturefor72h.Themetallicsampleswerethenremovedfromtheaqueoussolution,rinsedthoroughlywithdistilledwater,ethanolandacetone,driedandweightedaccuratelyagain.Theinhibitionefficiency(n，weightlossmeasurements)wasdeterminedaccordingtoEq.1:W一Wn(%)=01-100%(Eq.1)W0whe

16、reW0andWaretheweightlossvaluesinabsenceandpresenceofCAMI,respectively.Electrochemicaltest.Electrochemicalstudies(potentiodynamicpolarization)werecarriedoutbyusingaconventionalthree-electrodecellconsistingofaQ235steelworkingelectrode,asaturatedcalomelelectrode(SCE)asreferenceandaplatinumauxiliary-ele

17、ctrode.Thepotentiodynamicpolarizationcurveswereobtainedbychangingtheelectrodepotentialautomaticallyfrom-200mVto+200mVwithascanrateof0.5mV/stostudytheelectrochemicalbehaviorofCAMIonthecorrosionofQ235steel.Theinhibitionefficiency(n,electrochemicalmeasurements)wasdeterminedaccordingtoEq.2:JI-1n(%)=1-10

18、0%(Eq.2)I0whereI。andIarethecorrosioncurrentdensitiesinabsenceandpresenceofCAMI,respectivelyResultsanddiscussionsInfraredspectroscopy.Thecharacteristicstretchingfrequenciesforv(C=Ninimidazolinering)andv(N一HinNH2)arepeakedat1651cm-1and3277cm-1,respectively.ThemaximaN一Hbending(scissoring)vibrationabsor

19、ptioninprimaryaminegroupislocatedat1595cm-1.Thestretchingvibrationspeakswereseenat3058cm-1foraromaticC一H,at3931and2862forCH2,at1074and1025cm-1forC一N.Themonosubstitutedaromaticringontheimidazolineringisindicatedbytheabsorptionsat703and774cm-1.Theseinfraredabsorptionsillustratetheformationofimidazolin

20、eintermediate.Gravimetricstudy.Fig.1andFig.2showthevariationofnin5%H2SO4calculatedfromweightlossofthemetallicsamples,subjectedtodifferentinhibitorconcentrationsatconstanttemperature(25C)anddifferentimmersiontemperatureswiththesameCAMIconcentration(30mgL-1),44AdvancedTechnologiesandSolutionsinIndustr

21、y90 5807570nob.85ZLVenekvrfe807570no65606560110203040150160ConcentrationofCAMI(mg/L)Fig.1TheinfluenceofCAMIconcentrationsoninhibitorefficiencyAsshowedinFig.1,whentheconcentrationofCAMIislessthan30mgL-1,nincreasesquicklywithanincreasinginCAMIconcentration,whileafurtherincreasecausesnoappreciablechang

22、eininhibitionperformance,whichillustratesthattheCAMIinhibitormoleculesactbyadsorptionmechanismatQ235steel/acidinterface5.Themaximumnis88%whentheCAMIconcentrationis60mgL-1.Toassesstheeffectoftemperatureoncorrosioninhibitiveprocess,weightlosstestswereperformedinthetemperaturerange25-45Cin5%H2SO4contai

23、ning30mgL-1CAMIinhibitor.Theresultshowsthatndecreasedsharplywithincreasingtemperature(seeFig.2),whichisconsistentwiththefactsthatcorrosionrateinacidsolutionsincreasesexponentiallywithtemperatureincreasebecausethehydrogenevolutionoverpotentialdecreases2andthereactionrateofimidazolineringsplittingincr

24、easeswithelevatedtemperatures6.Electrochemicalmeasurement.Theeffectofinhibitorconcentrationonbothanodicandcathodiccurvesofcarbonsteelin5%H2SO4wasstudiedusingpotentiodynamicpolarizationtechniqueatdifferentconcentrationsofCAMIinhibitor(0and300mgL】)，theobtainedexperimentalresultsareshowninFig.3.Ascanbe

25、seeninFig.3,theslopesofthecathodicandanodicTafellinesarenotsignificantlyinfluencedbytheinhibitorconcentrationwhichsuggeststhattheCAMImoleculesrestrainsthecorrosionofQ235carbonsteelwithoutchangingthecathodicandanodiccorrosionmechanism7.ThepresenceofinhibitorCAMI(300mgL-1)bringsasignificanteffectonthe

26、current-potentialrelationsforboththecathodicandanodicprocessandthedisplacementincorrosionpotential(30mV)ismuchlessthan85mVAccordingtoFerreiraet.al8andLiet.al.9,whenthedisplacementismorethan85mVcomparingtothatoftheblanksolution,theinhibitorcanbeconsiderasacathodicoranodictype.Alltheaforementionedfact

27、sareclearevidencethattheCAMIisamixed-typeinhibitor.5511111112530354045Temperature(C)Fig.2Theeffectoftemperatureoninhibitionefficiency-L2r目包ZE-L-i-0.-0.1-0.5-h；-：1.3-0.-10r./vFig.3Polarizationcurvesinthepresence(300mgL-l)andabsenceofCAMIinhibitorConclusionsCAMIshowsastronginhibitiveeffectforthecorros

28、ionofQ235steelin5%H2SO4andrestrainsthecorrosionwithoutchangingthecathodicandanodiccorrosionmechanismviachemicaladsorptiononthesurfaceofQ235steel.TheresultsofpotentiodynamicpolarizationtestsindicatethatCAMIisamixed-typeinhibitor.TheinhibitionefficiencyofCAMIdeclinessharplyasthetemperatureincreasesand

29、increasesquicklywithanincreasinginCAMIconcentrationwhentheconcentrationislessthan30mgL-1.AcknowledgmentThisworkissupportedbytheMaterialCorrosionandProtectionKeyLaboratoryofSichuanProvince,China(No.2012CL12and2011CL11).ReferencesD.Wahyuningrum,S.Achmad,Y.MaolanaSyah,et.al.Int.J.Electrochem.Sci.,2008,

30、3,p.154-166.A.Zarrouk,H.Zarrok,R.Salghi,et.al.Int.J.Electrochem.Sci.,2012,7,p.10215-10232.F.Alvarez,C.A.Grillo,P.L.Schilardi,et.al.Appl.Mater.Interfaces,2013,5,p.249-255.4E.Stupnisek-Lisac,A.GazivodaandM.Madzarac.ElectrochimicaActa,2002,47,p.4189-4194.M.A.Migaheda,A.M.A.Raheima,A.M.Attaa,et.al.Mater

31、.Chem.Phys.,2010,121,p.208-214.B.Jiang,J.Zhang,M.Du,et.al.FineChemicalIndustry,2009,26(8),p.760-763.7C.E.KaanandH.Mustafa.Corros.Sci,2006,48(4),p.797-812.E.S.Ferreira,C.Giancomelli,F.C.Giacomelli,et.al.Mater.Chem.Phys.,2004,83,p.129.9W.H.Li,Q.He,C.L.Pei,et.al.J.Appl.Electrochem.,2008,3&p.289.外文翻譯：譯文

32、AdvancedTechnologiesandSolutionsinIndustry10.4028/ HYPERLINK /AMR.710 /AMR.710CorrosionInhibitionofChloroacetic-AcidModifiedImidazolineforQ235SteelinH2SO4Solution10.4028/ HYPERLINK /AMR.710.41 /AMR.710.41外文翻譯 氯乙酸改性的咪唑啉腐蝕抑制在H2S04溶液中的Q235鋼ZhaoBin,ZouLike關(guān)鍵詞：咪唑啉;腐蝕抑制劑;重量損失測(cè)量;極化曲線摘要：通過(guò)由苯甲酸和二亞乙基三胺的酰胺化和環(huán)化

33、反應(yīng)獲得的咪唑啉中間體與氯乙酸的季銨化合成新的氯乙酸改性的咪唑啉（CAMI）。通過(guò)重量損失測(cè)量和電位動(dòng)力學(xué)極化技術(shù)研究了合成化合物CAMI作為Q235碳鋼在5%硫酸溶液中的緩蝕劑的性能。結(jié)果表明，CAMI對(duì)Q235碳鋼在酸性介質(zhì)中的腐蝕具有很強(qiáng)的抑制作用，抑制腐蝕，不改變作為混合型抑制劑的陰極和陽(yáng)極腐蝕機(jī)理。介紹每年，由于自然環(huán)境中的金屬腐蝕，工業(yè)生產(chǎn)，石油和天然氣的勘探和生產(chǎn)，造成了嚴(yán)重的損失。腐蝕抑制劑的應(yīng)用是在各種腐蝕介質(zhì)中，特別是在酸性介質(zhì)中保護(hù)金屬免受腐蝕的最有效和實(shí)用的方法之一，酸性溶液廣泛用于工業(yè)中，例如酸洗，工業(yè)酸清洗，酸除垢和油井清潔。大多數(shù)眾所周知的抑制劑是含有氮，硫和/或

34、氧原子的有機(jī)化合物1-3。在用于抑制酸性介質(zhì)中金屬腐蝕的各種有機(jī)抑制劑中，氮基有機(jī)抑制劑，咪唑啉衍生物由于其優(yōu)異的抑制性能而備受關(guān)注4。然而，大多數(shù)咪唑啉衍生物不溶于水，需要改性以提高它們的水溶性和腐蝕抑制性能。在這項(xiàng)工作中，合成新的氯乙酸修飾咪唑啉（CAMI），其有效性和電化學(xué)行為對(duì)Q235鋼的腐蝕通過(guò)重量損失測(cè)量，電位動(dòng)力學(xué)極化技術(shù)研究。實(shí)驗(yàn)工作試劑和儀器所有試劑均可商購(gòu)，并且直接使用而無(wú)需進(jìn)一步純化。Q235鋼用于電化學(xué)和重量損失研究。通過(guò)使用AR級(jí)硫酸和兩次去離子水制備測(cè)試溶液。使用5%硫酸水溶液（質(zhì)量比）作為腐蝕介質(zhì)。紅外數(shù)據(jù)作為KBr圓盤在Niclet6700FT-IR分光光度計(jì)上

35、記錄。電化學(xué)測(cè)量在電化學(xué)合成測(cè)試系統(tǒng)LK98C（天津LanLiKe化學(xué)電子科技有限公司）上進(jìn)行。咪唑啉中間體的制備將催化劑氧化鋁和載水劑二甲苯加入到苯甲酸和二亞乙基三胺（1:1.2摩爾比）的混合物中。將反應(yīng)混合物在氮保護(hù)下攪拌并加熱至140C并保持在此溫度。+2NH;UH;CH;NHCH;HH;Amidttioii140fC,-2H,0嚴(yán)0弋嚴(yán)G-NHCH.CHjHHUH2CH.NHj方案1.咪唑啉中間體和CAMI的制備咪唑啉緩蝕劑（CAMI）的制備。將獲得的咪唑啉中間體和氯乙酸（1：1.3摩爾比）的混合物在60C下攪拌3小時(shí)，得到季銨化咪唑啉抑制劑（CAMI）。靜態(tài)重量損失試驗(yàn)。對(duì)尺寸為2.

36、0cmX1.5cmX0.2cm的Q235鋼板的金屬樣品進(jìn)行重量損失測(cè)試，所述Q235鋼板用200至2000號(hào)粒度的碳化硅紙進(jìn)行濕法研磨，用去離子水洗滌并用己烷脫脂，在異丙醇和丙酮中漂洗。對(duì)于每個(gè)測(cè)試，將三個(gè)清潔和干燥的樣品浸入5%H2SO4（質(zhì)量比）溶液中，將抑制劑CAMI的凝固濃度設(shè)定在設(shè)定溫度下72小時(shí)。然后從水溶液中取出金屬樣品，用蒸餾水，乙醇和丙酮徹底沖洗，干燥并再次精確稱重。根據(jù)等式1確定抑制效率（n，重量損失測(cè)量）：W一W(Eq.1)n（%）=01*100%Wo其中W和W分別是在缺乏和存在CAMI的情況下的重量損失值。01電化學(xué)試驗(yàn)。通過(guò)使用由Q235鋼工作電極，飽和甘汞電極（SC

37、E）作為參考和鉑輔助電極組成的常規(guī)三電極電池進(jìn)行電化學(xué)研究（電位動(dòng)力學(xué)極化）。通過(guò)以0.5mV/s的掃描速率自動(dòng)將電極電位從-200mV改變?yōu)?200mV來(lái)獲得電位動(dòng)力學(xué)極化曲線,以研究CAMI對(duì)Q235鋼的腐蝕的電化學(xué)行為。根據(jù)等式1確定抑制效率（n,電化學(xué)測(cè)量）：I一I(Eq.2)n（%）二_0_1*ioo%Io其中I和I分別是在缺乏和存在CAMI的情況下的腐蝕電流密度。01結(jié)果和討論紅外光譜。v（咪唑啉環(huán)中的。=N）和v（NH2中的N-H）的特征拉伸頻率分別在1651cm-1和3277cm-1處達(dá)到峰值。伯胺基中的最大N-H彎曲（剪切）振動(dòng)吸收位于1595cm-1。在3058cm-1處芳

38、香族C-H，在3931和2862處對(duì)于CH2,在1074和1025cm-1處對(duì)于C-N觀察到拉伸振動(dòng)峰。咪唑啉環(huán)上的單取代芳環(huán)由703和774cm-1處的吸收指示。這些紅外吸收說(shuō)明了咪唑啉中間體的形成。外文翻譯 重量研究。圖1和圖2顯示了在5%HSO中的n的變化，根據(jù)金屬樣品的重量損24失計(jì)算，在恒溫（25C）和不同浸漬溫度下，使用相同的CAMI濃度（30mgL-1）。(55-60-1J03040SO60ConcentratinfCXuil(mg/L)圖1CAMI濃度對(duì)抑制劑效率的影響如圖1所示，當(dāng)CAMI的濃度小于30mgL-1）時(shí)，n隨著CAMI濃度的增加而迅速增加，而進(jìn)一步的增加不會(huì)引起抑制性能的明顯變化，這說(shuō)明CAMI抑制劑分子通過(guò)吸附機(jī)制起作用在Q235鋼/酸界面5。當(dāng)CAMI濃度為60mgL-1時(shí)，最大n88%。為了評(píng)估溫度對(duì)腐蝕抑制過(guò)程的影響，在25-45C的溫度范圍內(nèi)在含有30mgL-1CAMI抑制劑的5%H2SO4中進(jìn)行重量損失測(cè)試。結(jié)果表明，n隨溫度升高而急劇下降（見(jiàn)圖2），這與酸溶液中腐蝕速率隨溫度升高呈指數(shù)增長(zhǎng)的事實(shí)一致，因?yàn)闅錃馕龀龀妱?shì)降低2和咪唑啉環(huán)的反應(yīng)速率分裂隨著溫度升高而增加6。電化學(xué)測(cè)量。在不同濃度的CAMI抑制劑（0和300mgL-1）下，使用電位動(dòng)力學(xué)極化技術(shù)研究了抑制劑濃度對(duì)碳鋼在5%H2SO