Please wait a minute...
中国腐蚀与防护学报  2007, Vol. 27 Issue (2): 93-96     
  研究报告 本期目录 | 过刊浏览 |
模拟偏析相Al2Zn在3%NaCl溶液中的电化学行为
刘斌;齐公台;冉伟;赵婷婷
华中科技大学化学系
ELECTROCHEMICAL BEHAVIOR OF THESIMULATED Al2Zn SEGREGATION IN 3%NaCl SOLUTION
;;;
华中科技大学化学系
全文: PDF(576 KB)  
摘要: 根据Al-Zn-In合金中偏析相Al2Zn的元素组成熔炼出模拟偏析相合金,测试了模拟偏析相合金和Al-Zn-In合金的自腐蚀电位、极化曲线和交流阻抗谱.结果表明:相对于Al-Zn-In合金,模拟偏析相Al2Zn自腐蚀速率小,自腐蚀电位负,呈现阳极性;Al-Zn-In合金中的偏析相Al2Zn与合金基体构成微区电偶腐蚀,受到阳极极化优先溶解,引起阳极电流效率的损失.
关键词 Al-Zn-InAl2Zn偏析相电化学行为    
Abstract:Simulated Al2Zn segregation alloys were developed according to the average elements distribution of zinc enriched zones of Al-Zn-In alloy. Open circuit potential against time,polarization curves,and electrochemical impedance spectroscopy were employed to study the electrochemical behavior of Al-Zn-In and simulated Al2Zn alloys. The results showed that the simulated Al2Zn alloy exhibits a more electronegative open circuit potential and a lower self-corrosion rate as compared with those of Al-Zn-In alloy. However,the Al2Zn segregation in Al-Zn-In alloy can be attributed to the formation of micro-local galvanic corrosion that leads to the preferential dissolution of Al2Zn and the loss of current efficiency.
Key wordsAl-Zn-In    Al2Zn    segregation    electrochemical behavior
收稿日期: 2005-10-14     
ZTFLH:  TG174.41  
通讯作者: 齐公台      E-mail: qigongtai@mail.hust.edu.cn

引用本文:

刘斌; 齐公台; 冉伟; 赵婷婷 . 模拟偏析相Al2Zn在3%NaCl溶液中的电化学行为[J]. 中国腐蚀与防护学报, 2007, 27(2): 93-96 .
. ELECTROCHEMICAL BEHAVIOR OF THESIMULATED Al2Zn SEGREGATION IN 3%NaCl SOLUTION. J Chin Soc Corr Pro, 2007, 27(2): 93-96 .

链接本文:

https://www.jcscp.org/CN/      或      https://www.jcscp.org/CN/Y2007/V27/I2/93

[1]Reboul M C,Gimenez P H,Ramaeu J J.A proposed activationmechanism for Al anodes[J].Corrosion,1984,40(7):366-371
[2]Salinas D R,Garcia S G,Bessone J B.Influence of alloying elementsand microstructure on aluminum sacrificial anode performance:Caseof Al-Zn[J].J.Appl.Electrochem.,1999,29(9):1063-1071
[3]Munoz AG,Saidman S B,Bessone J B.Corrosion of an Al-Zn-Inalloy in chloride media[J].Corros.Sci.,2002,44(10):2171-2182
[4]Venugopal A,Angal R D,Raja V S.Effect of grain boundary corro-sion on impedance characteristics of an aluminum-zinc-indiumal-loy in 3.5%sodium chloride solution[J].Corrosion,1996,52(2):138-142
[5]Venugopal A,Raja V S.AC impedance study on the activationmechanism of aluminium by indium and zinc in 3.5%NaCl medium[J].Corros.Sci.,1997,39(12):2053-2065
[6]Ashok S R,Venkataramani A,Parthiban G T,et al.Performance ofaluminium anodes under heat treatment[J].Corrosion Prevention&Control,2002,49(2):60-63
[7]Qi G T,Guo Z H,Qu J E.Effect of magnesium on microstructureand performance of containing RE aluminum anode[J].J.Chin.Soc.Corros.Prot.,2001,21(4):220-224(齐公台,郭稚弧,屈钧娥.合金元素Mg对含RE铝阳极组织与性能的影响[J].中国腐蚀与防护学报,2001,21(4):220-224)
[8]Qi G T,Liao H X,Qu J E.Study on the electrochemical perform-ances of segregation phases in aluminum anodes containing RE[J].J.Chin.Soc.Corros.Prot.,2003,23(6):354-358(齐公台,廖海星,屈钧娥.含RE铝阳极中析出相的电化学行为研究[J].中国腐蚀与防护学报,2003,23(6):354-358)
[9]Buchheit R G.A compilation of corrosion potentials reported for in-termetallic phases in aluminum alloys[J].J.Electrochem.Soc.,1995,142(11):3994-3996
[10]Li Y,Li G G.The analysis for failure Al sacrificial anode used insea bed pipelines[J].J.Chin.Soc.Corros.Prot.,2002,22(1):60-63(李异,李光广.在役海底管线牺牲阳极失效分析[J].中国腐蚀与防护学报,2002,22(1):60-63).
[11]Bessone J B,Flamini D O,Saidman D O.Comprehensive model forthe activation mechanism of Al-Zn alloys produced by indium[J].Corros.Sci.,2005,47(1):95-105
[12]Xu G,Cao C N,Lin HC,et al.Electrochemical study of active dis-solution for aluminum in neutral NaCl solution[J].Corros.Sci.Prot.Technol.,1998,10(6):321-326(许刚,曹楚南,林海潮,等.纯铝在NaCl溶液中活化溶解时电化学行为研究[J].腐蚀科学与防护技术,1998,10(6):321-326)
[13]Venugopal A,Veluchamy P,Selvam P,et al.X-ray photoelectronspectroscopic study of the oxide film on an aluminum-tin alloy in3.5%sodium chloride solution[J].Corrosion,1997,53(10):808-812
[1] 赵洪涛,陆卫中,李京,郑玉贵. 无溶剂环氧防腐涂层在模拟海水冲刷条件下的电化学行为[J]. 中国腐蚀与防护学报, 2016, 36(4): 295-305.
[2] 孟向楠,陈旭,吴明,赵阳,范裕文. 静水压力对X100钢在NaHCO3+NaCl溶液中电化学行为的影响[J]. 中国腐蚀与防护学报, 2016, 36(3): 219-224.
[3] 赵国强, 魏英华, 李京. Al-Zn-In牺牲阳极在不同工作电流密度下电流效率及溶解机制的研究[J]. 中国腐蚀与防护学报, 2015, 35(1): 69-74.
[4] 袁玮, 黄峰, 胡骞, 刘静, 侯震宇. 外加拉应力对X80管线钢点蚀电化学行为的影响[J]. 中国腐蚀与防护学报, 2013, 33(4): 277-282.
[5] 熊媛媛 张 娅 胡少峰 陈秋荣, 谢有桃. 添加剂La(CH3COO)3和NaF对AZ31在
Mg(ClO4)2溶液中电化学性能的影响
[J]. 中国腐蚀与防护学报, 2013, 33(3): 241-244.
[6] 王石青 何德良 丁庆云 徐以兵 高 娟 区永康. 模数对水性硅酸钾富锌涂层电化学行为的影响[J]. 中国腐蚀与防护学报, 2008, 28(6期): 359-362.
[7] 刘斌; 李瑛; 王福会 . 锌粉颜料尺寸对有机富锌涂层电化学行为的影响[J]. 中国腐蚀与防护学报, 2003, 23(6): 350-354 .
[8] 齐公台; 屈钧娥; 廖海星 . 含RE铝阳极中析出相的电化学行为研究[J]. 中国腐蚀与防护学报, 2003, 23(6): 355-358 .