| Study of Microbiologicaily Induced Corrosion Action on Al-6Mg-Zr and Al-6Mg-Zr-Sc |
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| 作者姓名： | 刘建华 梁馨 李松梅 |
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| 作者单位： | School of Materials Science and Engineering, BeiHang University, Beijing 100083, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （50571003） |
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| 摘 要： | The corrosion behaviors of Al-6Mg-Zr and Al-6Mg-Zr-Sc in the sulfate-reducing bacteria （SRB） solution in anaerobic environment were studied using electrochemical, microbiological, and surface analysis methods. It was found that the oxide film was more compact owing to the addition of Sc resulting in the open circuit potential shifting by about 100mV positively. On the other hand, it was seen that the pitting sensitivity of Al-6Mg-Zr-Sc alloy in SRB solution decreased and its microbiologically influenced corrosion resistance was improved. Pitting corrosion occurring on the surface of the two alloys under the comprehensive action of the metabolism of SRB was observed by SEM. It was obtained by EDS that the corrosion degree increased with time and corrosion was furthered by deposition of the product.
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| 关 键 词： | 铝-镁合金 硫酸盐 细菌 稀土元素 化学结构 |
| 文章编号： | 1002-0721（2007）05-0609-06 |
| 收稿时间： | 13 March 2007 |
| 修稿时间： | 2007-03-13 |
Study of Microbiologically Induced Corrosion Action on Al-6Mg-Zr and Al-6Mg-Zr-Sc |
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| Liu , Liang Xin,Li Songmei.Study of Microbiologicaily Induced Corrosion Action on Al-6Mg-Zr and Al-6Mg-Zr-Sc[J].Journal of Rare Earths,2007,25(5):609-614. |
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| Authors: | Liu Liang Xin Li Songmei |
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| Affiliation: | School of Materials Science and Engineering, BeiHang University, Beijing 100083, China |
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| Abstract: | The corrosion behaviors of Al-6Mg-Zr and Al-6Mg-Zr-Sc in the sulfate-reducing bacteria (SRB) solution in anaerobic environment were studied using electrochemical, microbiological, and surface analysis methods. It was found that the oxide film was more compact owing to the addition of Sc resulting in the open circuit potential shifting by about 100mV positively. On the other hand, it was seen that the pitting sensitivity of Al-6Mg-Zr-Sc alloy in SRB solution decreased and its microbiologically influenced corrosion resistance was improved. Pitting corrosion occurring on the surface of the two alloys under the comprehensive action of the metabolism of SRB was observed by SEM. It was obtained by EDS that the corrosion degree increased with time and corrosion was furthered by deposition of the product. |
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| Keywords: | microbiologically influenced corrosion Al-M g alloy Al-Sc alloy sulfate-reducing bacteria pitting rare earths |
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