Electrochemistry Communications电化学通信

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1、ElectrochemistryCommunications12(2010)191–193ContentslistsavailableatScienceDirectElectrochemistryCommunicationsjournalhomepage:www.elsevier.com/locate/elecomEvidencefortheoccurrenceofelectrochemicalreactionsandtheirinteractionwithchemicalreactionsduringthecorrosionofpureFewi

2、thsolidNaCldepositinwatervaporat600°CYanbingTang,LiLiu,YingLi*,FuhuiWangStateKeyLaboratoryforCorrosionandProtection,InstituteofMetalResearch,ChineseAcademyofSciences,WencuiRoad62,Shenyang110016,ChinaarticleinfoabstractArticlehistory:Theresultsofthisworkprovethatelectrochemica

3、lreactionsareinvolvedinthewholecorrosionprocessReceived16October2009ofpureFewithasolidNaCldepositinwatervaporat600°C.Theinteractionofchemicalandelectro-Receivedinrevisedform12November2009chemicalreactionsacceleratesthecorrosionrateofpureFesignificantly.Theelectrochemicalreacti

4、onAccepted12November2009iscoupledwithaprecedingchemicalreactionprocess(ce),inwhichFefirstreactschemicallywithNaClAvailableonline18November2009andwatervaportogenerateHCl(g).Andthen,theelectrochemicalreactionproceedsviaaone-electronelectrochemicalreductiontoformH2.Keywords:Ó2009

5、ElsevierB.V.Allrightsreserved.SolidNaClWatervaporMediumtemperatureChronopotentiometryEIS1.Introductionnecessarytounderstandthecorrosionmechanismofmetals/alloysinthisenvironmentinordertodevelopeffectiveprotectionMarinecorrosionofturbinebladesinplanesorshipsisverytechniques.ser

6、iousbecauseofthesynergisticeffectofsolidNaClandwaterva-poratmediumandhightemperatures[1–8].Fromtheresultsofa2.Experimentalsystematicinvestigationofthiscorrosionithasbeensuggestedthattheremaybea‘‘dynamicwaterfilm”withH2Omoleculescon-PureFe(99.9%)specimenswereused,thepreparation

7、ofwhichtinuouslybeingabsorbedon,andevaporatingfrom,thesurfaceofhasbeenreportedelsewhere[8].Aspecialthree-electrodesystemthematerialandthatelectrochemicalcorrosionoccursinthiswasbuiltfortheelectrochemicalmeasurementsinthisparticularwaterfilm,whichacceleratesthemetaldissolution[

8、3].However,environment.Thetopandcross-sectionviewoftheelectrodethish