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Mg-14Li-1Al-0.1Ce合金在NaCl溶液中的腐蚀行为 被引量:2

Corrosion Behaviors of Mg-14Li-1Al-0.1Ce Alloy in NaCl Solutions
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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。 The corrosion characteristics of Mg-14Li-1A1-0. 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. 92 Mg4. 08 and Li3 Mg7.
出处 《腐蚀与防护》 CAS 北大核心 2012年第2期115-119,共5页 Corrosion & Protection
基金 超轻材料与表面技术教育部重点实验室资助项目
关键词 镁锂合金 腐蚀 腐蚀形貌 XRD corrosion magnesium-lithium alloy SEM XRD
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  • 1Liu B, Zhang M L, Wu R Z. Effects of Nd on micro- structure and mechanical properties of as-cast LA141 alloys[J]. Materials Science and Engineering A,2008, 487. 347-351.
  • 2Wu R Z,Qu Z K,Zhang M L. Effects of the addition of Y in Mg-8Li-(1,3)A1 alloy[J]. Materials Scienceand Engineering A, 2009,516:96- 99.
  • 3Xiang Q,Wu R Z,Zhang M L. Influence of Sn on mi- crostructure and mechanical properties of Mg-5Li-3A1- 2Zn alloys [J]. Journal of Alloys and Compounds,2009,477:832-835.
  • 4Zhang C H, Huang X M, Zhang M L, et al. Electro- chemical characterization of the corrosion of a Mg-Li Alloy[J]. Materials Letters, 2008,62 : 2177- 2180.
  • 5Gao L L,Zhang C H,Zhang M L,et al. The corrosion of a novel Mg-llLi-3A1-0. 5RE alloy in alkaline NaC1 solution[J]. Journal of Alloys and Compounds, 2009,468:285-289.
  • 6Song Y W,Shan D Y,Chen R S,et al. Corrosion char- acterization of Mg-8Li alloy in NaC1 solution[J]. Cor- rosion Science, 2009,51 : 1087- 1094.
  • 7Zhao 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.
  • 8Zhao 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.
  • 9Song G L. Recent process in corrosion and protection of magnesium alloys[J].Advanced Engineering Mate- rials, 2005(7) : 563- 586.
  • 10Shi Z M, Liu M, Atrens A. Measurement of the cor- rosion rate of magnesium alloys using Tafel extrapola- tion[J].Corrosion Science, 2010,52: 579- 588.

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  • 1李红斌,姚广春,吉海宾,刘宜汉,郭志强.Ca对超轻Mg-Li-Al合金显微组织和力学性能的影响[J].铸造,2005,54(12):1276-1279. 被引量:9
  • 2王永强,于化忠,蔡生民,刘忠范.偶氮苯自组装单分子膜的特征电化学响应[J].科学通报,1996,41(18):1670-1672. 被引量:5
  • 3I.i D G, Yu X J, Dong Y H. The different self-assem- bled way of n- and t-dodeeyl mercaptan on the surface of copper [J]. Applied Surface Science, 2007,253(9): 4182-4187.
  • 4Al- Sabagh A M , Kandil N Gh , Ramadan 0 , et al.Novel cationic surfactants from fatty acids and their corrosion inhibition efficiency for carbon steel pipelines in 1 M HC1 [J]. Egyptian Journal of Petroleum, 2011, 20(2) :47-57.
  • 5Deyab M A, Abo Diel H A, Eissa E A, et al. Elec trochemical investigations of naphthenic acid corrosion for carbon steel and the inhibitive effect by some ethoxylated fatty acids [J]. Electrochimica Acta, 2007,52(28) ,8105-8110.
  • 6Kovacevic N, Kokalj A. Analysis of molecular elec- tronic structure of imidazole and benzimidazole-based inhibitors:A simple recipe for qualitative estimation of chemical hardness [J]. Corrosion Science, 2011, 53 (3) :909-921.
  • 7Safak S, Duran B, Yurt A, et al. Schiff bases as cor- rosion inhibitor for aluminium in HC1 solution [J]. Corrosion Science, 2012,54(1) : 251-259.
  • 8Ma H Y, Yang C, Chen S H, et al. Electrochemical investigation of dynamic interfacial processes at 1-oc- tadecanethiol-modified copper electrodes in halidecontaining solutions [J]. Electrochimica Acta, 2003, 48(28) :4277-4289.
  • 9Zhang D Q, Liu P H, Gao L X, et al. Photosensitive self-assembled membrane of cysteine against copper corrosion [J]. Materials Letters, 2011,65(11) : 1636- 1638.
  • 10Lei Y, Hao H, Gu Songwei, et al. Effects of electromagnetic stirring on microstructure and mechanical properties of super light Mg-Li-Al-Zn alloy [J]. Transactions of Nonferrous Metals Society of China, 2010,20($2): 388-392.

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