Mg-14Li-1Al-0.1Ce合金在NaCl溶液中的腐蚀行为
Corrosion Behaviors of Mg-14Li-1Al-0.1Ce Alloy in NaCl Solutions
摘 要
采用电化学方法研究了Mg-14Li-1Al-0.1Ce合金在NaCl溶液中的腐蚀行为, 采用扫描电镜观察腐蚀后的表面形貌, 用失重法测试腐蚀速率, 用X射线衍射(XRD)分析了腐蚀层和溶液中腐蚀颗粒的组成。结果表明, Mg-Li-Al-Ce合金的腐蚀速率随溶液Cl-浓度增大而增大, 由失重法所得到的腐蚀速率远大于由腐蚀电流密度(Jcorr)计算所得的腐蚀速率。扫描电镜(SEM)观察表明,合金表面随溶液Cl-浓度增加而破坏严重。腐蚀产物层没有保护作用, 在腐蚀产物下有明显的蚀坑和裂纹。XRD表明腐蚀产物层和溶液中腐蚀颗粒由Mg(OH)2、Li0.92Mg4.08和Li3Mg7组成。
腐蚀
腐蚀形貌
XRD
corrosion
magnesium-lithium alloy
SEM
XRD
Abstract
The corrosion characteristics of Mg-14Li-1Al-0.1Ce alloy in NaCl solutions were investigated by electrochemical measurements. The morphology of corroded surface was observed by scanning electron microscopy (SEM), the corrosion rates were investigated by weight-loss method and XRD was used to analyze the composition of corrosion layer and corrosion products deposited in solution. The results showed that the corrosion resistance of Mg-Li-Al-Ce alloy gradually deteriorated with increasing the concentration of Cl-. The corrosion rate of Mg-Li-Al-Ce alloy evaluated by Tafel extrapolation from polarization curves was much lower than that evaluated by weight-loss method. SEM observation showed that the alloy surface was broken more severely in higher Cl- concentration solutions. The corrosion layer formed on the surface of alloy could not inhibit corrosion, after removing the corrosion products attached on the alloy surface, deep pits and cracks were observed. Both corrosion layer and corrosion products deposited in solution consisted of Mg(OH)2, Li0.92Mg4.08 and Li3Mg7.
中图分类号 TG172
所属栏目 试验研究
基金项目 超轻材料与表面技术教育部重点实验室资助项目
收稿日期 2011/4/4
修改稿日期
网络出版日期
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备注马毅斌,博士研究生,
引用该论文: MA Yi-Bin,LI Ning,LI De-yu,ZHANG Mi-lin,HUANG Xiao-mei. Corrosion Behaviors of Mg-14Li-1Al-0.1Ce Alloy in NaCl Solutions[J]. Corrosion & Protection, 2012, 33(2): 115
被引情况:
【1】王卫云,李忠芳,王素文, "香兰素缩3, 4-二氨基苯甲酸在45#钢表面的组装工艺对其缓蚀性能的影响",腐蚀与防护 34, 193-196(2013)
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参考文献
【1】Liu B,Zhang M L,Wu R Z. Effects of Nd on microstructure and mechanical properties of as-cast LA141 alloys[J]. Materials Science and Engineering A,2008,487:347-351.
【2】Wu R Z,Qu Z K,Zhang M L. Effects of the addition of Y in Mg-8Li-(1,3)Al alloy[J]. Materials Science and Engineering A,2009,516:96-99.
【3】Xiang Q,Wu R Z,Zhang M L. Influence of Sn on microstructure and mechanical properties of Mg-5Li-3Al-2Zn alloys[J]. Journal of Alloys and Compounds,2009,477:832-835.
【4】Zhang C H,Huang X M,Zhang M L,et al. Electrochemical characterization of the corrosion of a Mg-Li Alloy[J]. Materials Letters,2008,62:2177-2180.
【5】Gao L L,Zhang C H,Zhang M L,et al. The corrosion of a novel Mg-11Li-3Al-0.5RE alloy in alkaline NaCl solution[J]. Journal of Alloys and Compounds,2009,468:285-289.
【6】Song Y W,Shan D Y,Chen R S,et al. Corrosion characterization of Mg-8Li alloy in NaCl solution[J]. Corrosion Science,2009,51:1087-1094.
【7】Zhao M C,Liu M,Song G L,et al. Influence of pH and chloride ion concentration on the corrosion of Mg alloy ZE41[J]. Corrosion Science,2008,50:3168-3178.
【8】Zhao M C,Schmutz P,Brunner S,et al. An exploratory study of the corrosion of Mg alloys during interrupted salt spray testing[J]. Corrosion Science,2009,51:1277-1292.
【9】Song G L. Recent process in corrosion and protection of magnesium alloys[J]. Advanced Engineering Materials,2005(7):563-586.
【10】Shi Z M,Liu M,Atrens A. Measurement of the corrosion rate of magnesium alloys using Tafel extrapolation[J]. Corrosion Science,2010,52:579-588.
【11】Anik M,Celikten G. Analysis of the electrochemical reaction behavior of alloy AZ91 by EIS technique in H3PO4/KOH buffered K2SO4 solutions[J]. Corrosion Science,2007,49:1878-1894.
【12】Galicia G,Pébère N,Tribollet B,et al. Local and global electrochemical impedances applied to the corrosion behaviour of an AZ91 magnesium alloy[J]. Corrosion Science,2009,51:1789-1794.
【13】Guo X W,Chang J W,He S M,et al. Investigation of corrosion behaviors of Mg-6Gd-3Y-0.4Zr alloy in NaCl aqueous solutions[J]. Electrochimica Acta,2007,52:2570-2579.
【14】胡婷婷,向斌,左秀丽,等. AZ91D镁合金在模拟酸雨溶液中的腐蚀行为[J]. 腐蚀与防护,2009,30(9):477-479.
【15】曹楚南, 张鉴清. 电化学阻抗谱导论[M]. 北京:科学出版社,2002,24-32.
【2】Wu R Z,Qu Z K,Zhang M L. Effects of the addition of Y in Mg-8Li-(1,3)Al alloy[J]. Materials Science and Engineering A,2009,516:96-99.
【3】Xiang Q,Wu R Z,Zhang M L. Influence of Sn on microstructure and mechanical properties of Mg-5Li-3Al-2Zn alloys[J]. Journal of Alloys and Compounds,2009,477:832-835.
【4】Zhang C H,Huang X M,Zhang M L,et al. Electrochemical characterization of the corrosion of a Mg-Li Alloy[J]. Materials Letters,2008,62:2177-2180.
【5】Gao L L,Zhang C H,Zhang M L,et al. The corrosion of a novel Mg-11Li-3Al-0.5RE alloy in alkaline NaCl solution[J]. Journal of Alloys and Compounds,2009,468:285-289.
【6】Song Y W,Shan D Y,Chen R S,et al. Corrosion characterization of Mg-8Li alloy in NaCl solution[J]. Corrosion Science,2009,51:1087-1094.
【7】Zhao M C,Liu M,Song G L,et al. Influence of pH and chloride ion concentration on the corrosion of Mg alloy ZE41[J]. Corrosion Science,2008,50:3168-3178.
【8】Zhao M C,Schmutz P,Brunner S,et al. An exploratory study of the corrosion of Mg alloys during interrupted salt spray testing[J]. Corrosion Science,2009,51:1277-1292.
【9】Song G L. Recent process in corrosion and protection of magnesium alloys[J]. Advanced Engineering Materials,2005(7):563-586.
【10】Shi Z M,Liu M,Atrens A. Measurement of the corrosion rate of magnesium alloys using Tafel extrapolation[J]. Corrosion Science,2010,52:579-588.
【11】Anik M,Celikten G. Analysis of the electrochemical reaction behavior of alloy AZ91 by EIS technique in H3PO4/KOH buffered K2SO4 solutions[J]. Corrosion Science,2007,49:1878-1894.
【12】Galicia G,Pébère N,Tribollet B,et al. Local and global electrochemical impedances applied to the corrosion behaviour of an AZ91 magnesium alloy[J]. Corrosion Science,2009,51:1789-1794.
【13】Guo X W,Chang J W,He S M,et al. Investigation of corrosion behaviors of Mg-6Gd-3Y-0.4Zr alloy in NaCl aqueous solutions[J]. Electrochimica Acta,2007,52:2570-2579.
【14】胡婷婷,向斌,左秀丽,等. AZ91D镁合金在模拟酸雨溶液中的腐蚀行为[J]. 腐蚀与防护,2009,30(9):477-479.
【15】曹楚南, 张鉴清. 电化学阻抗谱导论[M]. 北京:科学出版社,2002,24-32.
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