|
|
|
| Potentiodynamic Polarization and EIS Behavior of Uranium in Three Different Solutions |
| 中国工程物理研究院 |
|
|
|
|
Abstract The corrosion electrochemical behavior of cast uranium has been studied in 0.5mol•L-1 H2SO4, 1mol•L-1 NaOH and 1mol•L-1 Na2SO4 solutions respectively using potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The results obtained by potentiodynamic polarization curves indicated that there appear “fake-passivity” phenomena in H2SO4 and Na2SO4 solutions, while in NaOH solution it exhibited a additional “passivity” region besides the former phenomena. The EIS results all exhibit obvious capacitance-resistance arc characteristic. The software named ZsimpWin was used to fit the data form EIS to obtain corresponding equivalent circuit which consistent well with the measured data. The physical model of corrosion for uranium in three different solutions were proposed to interpret their equivalent circuits. The chi-square values between simulated data and measured data are within 10-3 order of magnitude.
|
|
Received: 15 November 2006
|
|
|
[1]Yang J R.Anticorrosion study of uranium surface treated by CO[D].Sichuan:China Academy of Physic Engineering,2001(杨江荣.金属铀表面经CO处理后的抗腐蚀性研究[D].四川:中国工程物理研究院,2001)
[2]Cao C N.Principle of Corrosion Electrochemistry(second edition)[M].Beijing:Chemical Industry Press,2004(曹楚南.腐蚀电化学原理(第二版)[M].北京:化学工业出版社,2004)
[3]Cao C N,Zhang J Q.An Introduction to Electrochemical Impedance Spectroscopy[M].Beijing:Science Press,2002(曹楚南,张鉴清.电化学阻抗谱导论[M].北京:科学出版社,2002)
[4]Mansfeld F,Kending M W.ASTM STP[M].1985,866:122
[5]Wang Q F.Electrochemical corrosion behaviours of nickel depositpulse-plated on depleted uranium surface[J].J.Eng.Mater.,2005,4(2):5-9(王庆富.贫铀表面脉冲电镀镍的电化学腐蚀行为[J].工程材料,2005,4(2):5-9)
[6]Fu X G,Wang X L,Bai C M,et al.Electrochemical corrosion behavior of uranium-niobium alloy in aqueous solutions[J].Ordn.Mater.Sci.Eng.,2001,24(4):13-16(伏晓国,汪小琳,柏朝茂等.铀铌合金在水溶液中的电化学腐蚀行为[J].兵器材料科学与工程,2001,24(4):13-16)
[7]Li J F,Zhang Z,Cao F H,et al.Study on electrochemical impedancefeatures of Al-Li alloys in EXCO solution[J].Acta Metall.Sin.,2003,39(4):426-430(李劲风,张昭,曹发和等.Al-Li合金在EXCO溶液中腐蚀的电化学阻抗研究[J].金属学报,2003,39(4):426-430)
[8]Su J X,Zhang Z,Cao F H,et al.Exfoliation corrosion behaviorof T6 treated 2090 Al-Li alloy in EXCO solution and EIS duringexfoliation corrosion evolution[J].Acta Metall.Sin.,2005,41(9):974-978(苏景新,张昭,曹发和等.T6态2090Al-Li合金在EXCO溶液中剥蚀行为和剥蚀发展过程中的电化学阻抗谱[J].金属学报,2005,41(9):974-978)
[9]Shao H B,Zhang J Q,Wang J M,et al.EIS analysis on the an-odic dissolution process of pure aluminum in an alkaline solution[J].Acta Phys.Chim.Sin.,2003,19(4):372-375(邵海波,张鉴清,王建明等.纯铝在强碱溶液中阳极溶解的电化学阻抗谱解析[J].物理化学学报,2003,19(4):372-375)
[10]Reddy B P,Vandarkuzhali S,Subramanian T,et al.Electro-chemical studies on the redox mechanism of uranium chloride inmolten LiCl-KCl eutectic[J].Electrochim.Acta,2004,49:2471-2478
[11]Miserque F,Gouder T,Wegen D H,et al.Use of UO2 films forelectrochemical studies[J].J.Nucl.Mater.,2001,298:280-290
[12]Shoesmith DW.Fuel corrosion processes under waste disposal con-ditions[J].J.Nucl.Mater.,2000,282:1-31
[13]Zhang J Q,Cao C N.The application of Kramers-Kronig trans-forms in impedance data analysis[J].J.Chin.Soc.Corros.Prot.,1991,11(2):105-110(张鉴清,曹楚南.Kramers-Kronig转换在阻抗数据分析中的应用[J].中国腐蚀与防护学报,1991,11(2):105-110) |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
