| Li对纯Al在酸性NaCl水溶液中腐蚀行为的影响 |
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| 引用本文： | 王赫男,刘春忠,鲁玲,栗仁山,林地.Li对纯Al在酸性NaCl水溶液中腐蚀行为的影响[J].稀有金属材料与工程,2018,47(5):1445-1450. |
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| 作者姓名： | 王赫男 刘春忠 鲁玲 栗仁山 林地 |
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| 作者单位： | 1沈阳航空航天大学,沈阳航空航天大学,1沈阳航空航天大学,1沈阳航空航天大学,1沈阳航空航天大学 |
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| 基金项目： | 国家自然科学基金资助(项目号51301113) |
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| 摘 要： | 真空熔炼制备1wt%和2wt%Li的Al-Li二元模型合金，研究Li含量对其在0.1MNaCl+0.01MH2SO4酸性水溶液中电化学腐蚀行为的影响。采用自腐蚀电位和电化学阻抗（EIS）评价纯Al、Al-1Li和Al-2Li合金的耐蚀性能，结合X射线光电子能谱（XPS）和Mott-Schottky（M-S）曲线对三种试样表面腐蚀产物膜成分和半导体特征进行分析。结果表明1wt%和2wt%Li使纯Al自腐蚀电位负移的同时，耐蚀性有所提高。合金元素Li参与腐蚀产物膜的形成，以Li2O的形式掺杂于Al2O3为主要成分的腐蚀产物膜中，没有改变腐蚀产物膜的n型半导体特征；但Li2O掺杂引起膜内氧空位浓度的降低，是Li提高纯Al耐蚀性的主要原因。
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| 关 键 词： | Al-Li合金 耐蚀性 腐蚀产物膜 氧空位浓度 |
| 收稿时间： | 2016/4/18 0:00:00 |
| 修稿时间： | 2016/6/30 0:00:00 |
Influence of Li to Electrochemical Corrosion Behavior for Pure Al in Acidic NaCl Solution |
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| Wang Henan,Liu Chunzhong,Lu Ling,Li Renshan and Lin Di.Influence of Li to Electrochemical Corrosion Behavior for Pure Al in Acidic NaCl Solution[J].Rare Metal Materials and Engineering,2018,47(5):1445-1450. |
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| Authors: | Wang Henan Liu Chunzhong Lu Ling Li Renshan and Lin Di |
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| Affiliation: | Shenyang Aerospace University,Institute of Materials Science and Technology,Shenyang Aerospace University,Institute of Materials Science and Technology,Shenyang Aerospace University,Institute of Materials Science and Technology,Shenyang Aerospace University,Institute of Materials Science and Technology,Shenyang Aerospace University |
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| Abstract: | Influence of 1wt% and 2wt% Li addition on the electrochemical corrosion behavior of pure Al was studied in 0.1MNaCl+0.01MH2SO4 acidic solution. Corrosion resistance was tested by free corrosion potential and electrochemical impedance spectrum (EIS). The composition and semiconducting properti of corrosion product films for pure Al, Al-1Li alloy and Al-2Li alloy formed at free corrosion potential were respectively analyzed by X-ray photoelectron spectroscopy (XPS) and Mott-Schottky (M-S) approach. The results showed that free corrosion potential of pure Al shifted in more active direction by Li addition, while its corrosion resistance was improved. Li, with high chemical activity, could participate in the film formation process and Li2O together with Al2O3 were existed in the product films. M-S plots revealed that Li addition did not change n-type semiconductor of corrosion product film on pure Al. But, the increasing of corrosion resistance was attributed to the decreasing of oxygen vacancy concentration in corrosion product films by Li addition to pure Al. |
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| Keywords: | Al-Li alloy Corrosion resistance Corrosion products film Oxygen vacancy concentration |
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