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| The Electrochemical Impedance Spectroscopy of Dacromet coating in seawater |
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| 哈尔滨工业大学（威海） |
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Cite this article:
. The Electrochemical Impedance Spectroscopy of Dacromet coating in seawater. J Chin Soc Corr Pro, 2007, 27(4): 197-201 .
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Abstract The evolution of electrochemical impedance spectroscopy(EIS)and open circuit potential were obtained from dacromet-coating mild steel, which were fully soaked in seawater. The EIS was analyzed by the equivalent circuitRO (RpC) (RDQ). The resistance showed the increasing with immersing time of the polarization resistance Rp, douible layer capacity C,diffusion resistance RD and the value of RD/RP. The conclusion was drawn that Zn dissolved at the beginning of corrosion process of dacromet and its sacrificial anode effects were limited by the accumulation of corrosion products,which thickened the thickness of passivation coating. The physical barrier action was the prominent anticorrosive mean afterqards.Dacromet coating failed to protect the base for pitting afier the cooperation of diffusion and dissolution overtook the barier effects.
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Received: 09 January 2006
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[1]Mulkin F.A new coating for corrosion and protection of metals with zinc powder passivated by chromate[P].US:3673731,1972
[2]Sun H M.Zn-Cr coating-a special newtechnique for surface treatment[J].Mater.Prot.,1994,27(18):21-23(孙贺民.锌铬膜—一种特殊的表面处理新技术[J].材料保护,1994,27(18):21-23)
[3]Su H J.The study on the formation of water-soluble coating[J].Surf.Technol.,2000,29(1):12-14(苏红军.水系锌铬膜涂层技术研究[J].表面技术,2000,29(1):12-14)
[4]Han S M,Zheng Y Z,Yu S X,et al.Study on microstructure and mechanism of zinc-aluminum-chromium conversion coating[J].J.Chin.Soc.Corros.Prot.,2002,22(5):269-273(韩树民,郑炀曾,于学升等.锌铝铬转化膜微观结构与成膜机理研究[J].中国腐蚀与防护学报,2002,22(5):269-273)
[5]Hu H L,Li N,Han J J,et al.Current status of dacromet technology[J].Electroplating and Finishing,2005,24(3):31-33(胡会利,李宁,韩家军等.达克罗的研究现状[J].电镀与涂饰,2005,24(3):31-33)
[6]GB/T18684-2002,Specification for zinc-chromium coating[S].(GB/T18684-2002,锌铬涂层技术条件[S].)
[7]Xu L C,Chen Z X,Ma Z W,et al.A study on preparation and corrosion resistance of Zn-Cr film coating[J].Corros.Prot.,1998,19(3):108-110(徐立冲,陈中兴,马志伟等.锌铬膜的制备及其耐蚀性研究[J].腐蚀与防护,1998,19(3):108-110)
[8]He J B,Lu D R,Li X L,et al.Investigation on corrosion kinetics behavior of dacromet coating[J].Chem.Res.Appl.,2002,14(1):81-83(何建波,鲁道荣,李学良等.达克罗涂层的腐蚀动力学行为研究[J].化学研究与应用,2002,14(1):81-83)
[9]Wang M,Huang X,Wang J L,et al.Dacromet and its application[J].Electroplating and Finishing,2001,20(2):65-67(王敏,黄鑫,王家禄等.达克罗技术及应用[J].电镀与涂饰,2001,20(2):65-67)
[10]Chen L,Li N,Zhou D R.Effect of chromic trioxide content in solutions on properties of sintered zinc-rich coatings[J].Chin.J.Nonferr.Metal,2001,10(Suppl.1):209-213(陈玲,李宁,周德瑞.涂料中含铬量对烧结式富锌涂层性能的影响[J].中国有色金属学报,2000,10(增刊1):209-213)
[11]Zha Q X.Kinetics in Electrode Processes[M].Beijing:Science Press,1976(查全性.电极过程动力学[M].北京:科学出版社,1976)
[12]Cao C N,Zhang J Q.Introduction of Electrochemical Impedance Spectroscope[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)
[13]Han S M,Zheng Y Z,Yu S X,et al.Corrosion prevention characteristics and mechanism of zinc-aluminum-chromium coating[J].Chin.J.Nonferr.Metals,2002,12(3):619-623(韩树民,郑炀曾,于升学等.锌铝铬膜的防腐性能与机理[J].中国有色金属学报,2002,12(3):619-623
[14]Chen L,Li N,Zhou D R,et al.The study of dacromet`s microstructure and its electrochemical characteristics[J].HighTechnology Letters,2000,(10):74-76(陈玲,李宁,周德瑞等.达克罗涂层的组织结构及电化学特性研究[J].高技术通讯,2000,(10):74-76
[15]Cao C N.Principle of Corrosion Electrochemistry[M].Beijing:Chemical Industry Press,2004(曹楚南.腐蚀电化学原理[M].北京:化学工业出版社,2004)
[16]Chung S C,Cheng J R,Chiou S D,et al.EIS behavior of anodized zinc in chloride environments[J].Corros.Sci.,2000,42(7):1249-1268 |
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