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中国腐蚀与防护学报  2016, Vol. 36 Issue (5): 421-426    DOI: 10.11902/1005.4537.2015.207
  本期目录 | 过刊浏览 |
Al-Mg-Sn-Ga铝阳极合金电化学性能研究
马景灵1,2(),任凤章1,王广欣1,2,熊毅1,文九巴1
1. 河南科技大学材料科学与工程学院 洛阳 471023
2. 河南科技大学 高纯材料研究中心 洛阳 471023
Electrochemical Performance of Al-Mg-Sn-Ga Aluminum Anode Alloy
Jingling MA1,2(),Fengzhang REN1,Guangxin WANG1,2,Yi XIONG1,Jiuba WEN1
1. School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China
2. Research Center for High Purity Materials, Henan University of Science and Technology, Luoyang 471023, China
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摘要: 

研究了铝空气电池阳极合金Al-0.5Mg-0.1Sn-0.05Ga (质量分数,%) 在铸态及40%变形状态下、在2 mol/L NaCl及4 mol/L NaOH溶液中的电化学性能,以期改善该合金的放电性能。结果表明,40%变形工艺提高了该合金的电化学活性,同时减小了合金的腐蚀速率。这是由于通过变形使铸态合金晶粒细化所致。合金的放电形貌及电化学阻抗谱 (EIS) 测试结果与电化学性能相符,变形合金作为阳极的空气电池,在2 mol/L NaCl溶液中的工作电位及阳极利用率高于Zn在4 mol/L NaOH溶液中相应的性能。
关键词 ： 铝合金,  空气电池,  变形,  自腐蚀    
Abstract：

In this research, Al-air battery based on Al-0.5Mg-0.1Sn-0.05Ga (mass fraction, %) anodes were set up, and then the electrochemical performance of the alloy, including the as-cast one and the deformed one with 40% reduction, was investigated in 2 mol/L NaCl and 4 mol/L NaOH solutions. The results show that the deformation process can increase the electrochemical activity, while decrease the free-corrosion rate of the alloy. This may be partially ascribed to the grain refinement induced by deformation process. The morphology observation of the alloy after discharge and the measured electrochemical impedance spectroscopy of the alloy proved the corrosion characteristics fairly well. In comparison, the working voltage and the anodic utilization rate of the deformed Al-0.5Mg-0.1Sn-0.05Ga alloy in 2 mol/L NaCl solution are higher than those of Zn in 4 mol/L NaOH solution.
Key words： aluminum alloy    air battery    deformation    self-corrosion
    
基金资助:河南省科技攻关计划项目 (162102210051) 和河南科技大学科技创新团队项目 (2015XTD006) 资助
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马景灵
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引用本文:

马景灵,任凤章,王广欣,熊毅,文九巴. Al-Mg-Sn-Ga铝阳极合金电化学性能研究[J]. 中国腐蚀与防护学报, 2016, 36(5): 421-426.
Jingling MA, Fengzhang REN, Guangxin WANG, Yi XIONG, Jiuba WEN. Electrochemical Performance of Al-Mg-Sn-Ga Aluminum Anode Alloy. Journal of Chinese Society for Corrosion and protection, 2016, 36(5): 421-426.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2015.207      或      https://www.jcscp.org/CN/Y2016/V36/I5/421

图1  铸态及变形态Al-0.5Mg-0.1Sn-0.05Ga合金在2 mol/L NaCl, 4 mol/L NaOH溶液中及Zn在4 mol/L NaOH溶液中的极化曲线
Material Solution Ecorr (Hg/HgO)V IcorrmAcm-2 RpΩcm2 Corrosion rate mgcm-2h-1
Al-Mg-Sn-Ga Cast 2 mol/L NaCl -1.40 0.76 67.9 6.27×10-3
Deformation 2 mol/L NaCl -1.43 0.28 106.9 5.63×10-3
Cast 4 mol/L NaOH -1.84 21.25 2.1 62.16
Deformation 4 mol/L NaOH -1.82 10.87 4.1 57.28
Zn Cast 4 mol/L NaOH -1.42 0.45 48.0 11.65
表1  铸态及变形Al-0.5Mg-0.1Sn-0.05Ga合金在2 mol/L NaCl, 4 mol/L NaOH溶液中及Zn在4 mol/L NaOH溶液中的腐蚀参数
图2  Al-0.5Mg-0.1Sn-0.05Ga合金在2 mol/L NaCl, 4 mol/LNaOH溶液中及Zn在4 mol/L NaOH溶液中的恒流放电曲线
Material Solution Operating voltage / V Anodic utilization / %
Al-Mg-Sn-Ga Cast 2 mol/L NaCl 1.13 67.8
Deformation 2 mol/L NaCl 1.16 68.9
Cast 4 mol/L NaOH 1.18 22.9
Deformation 4 mol/L NaOH 1.37 25.1
Zn Cast 4 mol/L NaOH 1.01 19.7
表2  不同阳极的金属-空气电池的放电性能参数
图3  Al-0.5Mg-0.1Sn-0.05Ga合金及Zn阳极在不同溶液中放电后的腐蚀形貌
图4  铸态及变形态Al-0.5Mg-0.1Sn-0.05Ga合金和Zn在2 mol/L NaCl和4 mol/L NaOH溶液中的EIS及其拟合曲线
图5  Al-0.5Mg-0.1Sn-0.05Ga合金和Zn在2 mol/L NaCl 和 4 mol/L NaOH 溶液中的等效电路图
Anode Solution L10-7 Hcm2 RsΩcm2 CPE110-4 Fcm-2 n10<n<1 RtΩcm2 CPE210-3 Fcm-2 n20<n<1 R2Ωcm2 L110-3 Hcm2 R1Ωcm2 x2
Al alloy cast 2 mol/L NaCl --- 7.86 30.35 0.84 930 4.25 0.80 64 --- --- 1.48×10-3
Al alloy deformation 2 mol/L NaCl --- 5.38 43.69 0.90 451 0.47 0.61 152 --- --- 5.23×10-4
Al alloy cast 4 mol/L NaOH 10.88 2.93 85.87 0.80 0.36 --- --- --- 29.13 0.06 5.97×10-5
Al alloy deformation 4 mol/L NaOH 11.73 1.65 56.71 0.35 1×10-7 --- --- --- 48.08 0.10 7.37×10-5
Zn 4 mol/L NaOH 11.99 1.87 81.09 0.60 4.43 --- --- --- 22.78 1.55 1.41×10-3
表3  Al-0.5Mg-0.1Sn-0.05Ga合金和纯Zn的EIS拟合值
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