扫描微电极法原位测量2024Al合金表面微区Cl~-浓度分布

电化学（中英文） ›› 2003, Vol. 9 ›› Issue (3): 280-286.

扫描微电极法原位测量2024Al合金表面微区Cl~-浓度分布

林玉华,邵敏华,胡融刚,李彦,杜荣归,林昌健

固体表面物理化学国家重点实验点,厦门大学化学系,固体表面物理化学国家重点实验点,厦门大学化学系,固体表面物理化学国家重点实验点,厦门大学化学系,固体表面物理化学国家重点实验点,厦门大学化学系,固体表面物理化学国家重点实验点,厦门大学化学系,固体表面物理化学国家重点实验点,厦门大学化学系福建厦门361005 ,福建厦门361005 ,福建厦门361005 ,福建厦门361005 ,福建厦门361005 ,福建厦门361005

收稿日期:2003-08-28 修回日期:2003-08-28 出版日期:2003-08-28 发布日期:2003-08-28

Fabrication of Scanning Micro Cl~- Probe and in Situ Imaging of Cl~- at the Interface of 2024 Al Aloy/Solution

LIN Yu_Hua,SHAO Min_Hua,HU Rong_Gang, LI Yan,DU Rong_Gui,LIN Chang_Jian *

(State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry Xiamen University,Xiamen 361005

Received:2003-08-28 Revised:2003-08-28 Published:2003-08-28 Online:2003-08-28

摘要/Abstract

摘要： 应用自研制扫描微电极测量系统和扫描微Ag/AgCl复合电极 ,原位测量含Cl- 溶液中 ,2 0 2 4Al合金在其局部腐蚀发生发展过程中金属 /溶液界面微区Cl- 离子的浓度分布 ,考察金属 /溶液界面微区Cl- 浓度分布对Al合金表面局部腐蚀行为的影响 .结果表明 ,扫描Ag/AgCl探针可实时跟踪腐蚀过程中金属表面氯离子浓度分布的动态行为 .当 2 0 2 4Al合金浸渍于含Cl- 溶液中 ,Cl- 离子在Al合金 /溶液界面呈不均匀分布 ,Cl- 主要在第 2相颗粒和铝基交界区域发生优先吸附和累积 ,从而促进局部腐蚀的发生和发展

关键词: Al合金, 局部腐蚀, 微Cl-复合电极, 表面Cl-浓度分布

Abstract: Micro combination Ag/AgCl electrode with a tip measuring tens micron in diameter was fabricated. The probe satisfied in situ imaging of Cl - distribution at metal surface in chloride solution because of its excellent linearity between potential and Cl - concentration, rapid response, good stability and selectivity. With the aid of the home made Micro Electrode Scanning system and scanning Cl - probe, the effect of the [Cl - ] at 2024_Al/solution interface on localized corrosion process was investigated. It was demonstated directly that Cl - ion in solution immigrated toward, then adsorbed preferentially and accumulated at the junction between the Al_Cu_Mg secondary phase and Al matrix, the uneven distribution of Cl - accelerated the initiation and development of localized corrosion of 2024_al alloy in Cl - containing solution.

Key words: Al alloy, Localized corrosion, Chloride ions distribution, Combination Cl - microelectrode

中图分类号:

TG171

林玉华,邵敏华,胡融刚,李彦,杜荣归,林昌健. 扫描微电极法原位测量2024Al合金表面微区Cl~-浓度分布[J]. 电化学（中英文）, 2003, 9(3): 280-286.

LIN Yu_Hua,SHAO Min_Hua,HU Rong_Gang, LI Yan,DU Rong_Gui,LIN Chang_Jian * . Fabrication of Scanning Micro Cl~- Probe and in Situ Imaging of Cl~- at the Interface of 2024 Al Aloy/Solution[J]. Journal of Electrochemistry, 2003, 9(3): 280-286.

导出引用管理器 EndNote|Ris|BibTeX

链接本文: https://electrochem.xmu.edu.cn/CN/

https://electrochem.xmu.edu.cn/CN/Y2003/V9/I3/280

参考文献

[1]　ZahaviJ ,ZangvilA ,MetzgerM .Structureandstabilityofanodicfilmsformedonaluminumcontainingdis persedAl3Fephase[J].J .Electrochem.Soc.,1978,125:438. [2]　LinCJ,ZhouXD ,TianZW ,etal.Novelelectrochemicaltechniqueswithspatialresolutionanditsapplica tionintheinvestigationoflocalizedcorrosions[J].J.XiamenUniv.(NaturalScience),2001,40:448. [3]　ShaoMH ,LinCJ .Areviewofinvestigationonpittingcorrosionofaluminumalloy[J].J.CorrosionScienceandProtectionTechnology,2002,14:147. [4]　ShaoMH ,FuY ,HuRG ,LinCJ .LocalizedcorrosionstudyofAl2024_T3alloybyscanningmicrorefer enceelectrodetechnique[J].J .ActPhys._chim.sin.,2002,18:350. [5]　ShaoMH ,HuangRS ,HuRG ,LinCJ .FabricationofcompositescanningmicropHelectrodeanditsap plicationinlocalizedcorrosion[J].J.ActPhys._chim.sin.,2002,18:934. [6]　Maurice,StrehbowHH ,MarursP .InsituSTEMstudyoftheinitialstagesofoxidationofCu(Ⅲ)inaque oussolution[J].Surf.Sci.,2000,458:185. [7]　VignalV ,RouxJC ,OliveJM ,etal.MorphologicalanalysisofstainlesssteelscalelikesurfacemorphologyusingSTMandAFM [J].ActaMaterialia,1997,46:149. [8]　StratmannM ,SteckelH .Ontheatmosphericcorrosionofmetalwhicharecoveredwiththinelectrolytelay ers_Iverificationoftheexperimentaltechnique[J].J .Corros.Sci.,1990,30:681. [9]　LiaX ,McCreeryRL .ChemistryofachromateconversioncoatingonaluminumalloyAl2024_T3probedbyvibrationalspectroscopy[J].J.Electrochem.Soc.,1998,145:3083. [10]　LinCJ,DuRG ,NguyenT .Insituimagingofchlorideionsatthemetal/solutioninterfacebyscanningcombinationmicroelectrodes[J].Corrosion,2000,56:41. [11]　LinCJ .Theearlystageofthepassivitylocalbreakdownandpittinginitiationofstainlesssteel[D].Xia men:XiamenUniv,1985. [12]　LiaoCM ,WeiRP .Galvaniccouplingofmodelalloytoaluminum_afoundationforunderstandingparticle_inducedpittinginaluminumalloy[J].J .Electrochim.Acta.,1999,45:881. [13]　BuchheitRG ,GrantRP ,HlavaPF ,etal.Localdissolution phenomenaassociatedwithSphase(Al2CuMg) particlesinaluminumalloy2024_T3[J].J .Electrochem.Soc.,1997,144:2621. [14]　ObispoM ,MurrLE ,ArrowoodRM ,etal.Copperdepositionduringthecorrosionofaluminumalloy2024insodiumchloridesolutions[J].J .Mater.Sci.,2000,35:3479.