| 稀土铈对铝合金LY12CZ微生物腐蚀行为的影响 |
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| 引用本文： | 赵勇,薛文斌,刘宏芳.稀土铈对铝合金LY12CZ微生物腐蚀行为的影响[J].物理化学学报,2011,27(11):2618-2624. |
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| 作者姓名： | 赵勇 薛文斌 刘宏芳 |
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| 作者单位： | 1. School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China;
2. Institute of Low Energy Nuclear Physics, Beijing Normal University, Beijing 100875, P. R. China |
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| 基金项目： | 北京师范大学射线束技术与材料改性教育部重点实验室开放课题 |
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| 摘 要： | 采用紫外分光光度法（UVS）、最大可能数法（MPN）、循环阳极极化法、电化学阻抗谱（EIS）和表面荧光显微法（EFM）研究了不同含量稀土Ce3+离子对硫酸盐还原菌（SRB）生长及LY12CZ铝合金微生物腐蚀行为的影响.结果表明:低浓度的Ce3+离子能够促进SRB生长,而高浓度时则抑制其生长;循环阳极极化曲线表明,稀土Ce3+离子的加入使铝合金LY12CZ的点蚀敏感性降低;电化学阻抗谱表明,在纯培养基中,随稀土Ce3+离子浓度的增大,铝合金耐蚀性增大.而在接种1%SRB的培养基中,当Ce3+浓度为0.376 mg·L-1时,生长旺盛的生物膜与Ce3+间产生协同作用,增加了基体铝合金耐腐蚀性能.随着Ce3+浓度的增加,SRB生长受到抑制,不能形成致密的生物膜.此时SRB的存在促进铝合金腐蚀,显著减弱Ce3+对基体铝合金的保护作用.
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| 关 键 词： | 硫酸盐还原菌 LY12CZ铝合金 稀土转化膜 电化学方法 Hormesis效应 |
| 收稿时间： | 2011-07-05 |
| 修稿时间： | 2011-09-01 |
Effect of Rare Earth Ce3+ on the Microbial Induced Corrosion Behavior of Aluminum Alloy LY12CZ |
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| ZHAO Yong,XUE Wen-Bin,LIU Hong-Fang.Effect of Rare Earth Ce3+ on the Microbial Induced Corrosion Behavior of Aluminum Alloy LY12CZ[J].Acta Physico-Chimica Sinica,2011,27(11):2618-2624. |
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| Authors: | ZHAO Yong XUE Wen-Bin LIU Hong-Fang |
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| Affiliation: | 1. School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China;
2. Institute of Low Energy Nuclear Physics, Beijing Normal University, Beijing 100875, P. R. China |
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| Abstract: | The effect of rare earth Ce~(3+) on the growth of sulfate reducing bacterial(SRB) and the microbial induced corrosion(MIC) of aluminum alloy LY12CZ was studied by ultraviolet spectrophotometry(UVS), maximum probable number(MPN),cyclic anodic polarization,electrochemical impedance spectroscopy (EIS),and epi-fluorescence microscopy(EFM).The results showed that the low concentrations of Ce~(3+) could promote the growth of SRB while high concentrations had an inhibiting effect.Cyclic anodic polarization curves ... |
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| Keywords: | Sulfate reducing bacterial Aluminum alloy LY12CZ Rare earth conversion film Electrochemical method Hormesis effect |
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