稀土铈对铝合金LY12CZ微生物腐蚀行为的影响

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. doi: 10.3866/PKU.WHXB20111109 shu

Citation: 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. doi: 10.3866/PKU.WHXB20111109 shu

稀土铈对铝合金LY12CZ微生物腐蚀行为的影响

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(201022)资助项目 (201022)

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.

关键词:

English

Effect of Rare Earth Ce³⁺ on the Microbial Induced Corrosion Behavior of Aluminum Alloy LY12CZ

1.
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
Received Date: 05 July 2011
Available Online: 27 October 2011
Fund Project:
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(201022)资助项目

Abstract: The effect of rare earth Ce³⁺ 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 Ce³⁺ could promote the growth of SRB while high concentrations had an inhibiting effect. Cyclic anodic polarization curves indicated that the pitting sensitivity of LY12CZ became lower in solutions containing rare earth Ce³⁺. EIS confirmed that corrosion resistance increased with an increase in the concentration of Ce³⁺. However, when inoculated with 1% SRB, the corrosion resistance was optimal at a Ce³⁺ concentration of 0.376 mg·L^-1 because of a synergistic effect between the biofilm and the rare earth conversion film. The growth of SRB was inhibited with an increase in the Ce³⁺ concentration which prevented the biofilm forming completely on the surface of the matrix. At the moment, the effect of MIC was more notable than the protection of rare earth conversion film that formed on the surface of aluminum alloy.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

稀土铈对铝合金LY12CZ微生物腐蚀行为的影响

English

Effect of Rare Earth Ce³⁺ on the Microbial Induced Corrosion Behavior of Aluminum Alloy LY12CZ

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

稀土铈对铝合金LY12CZ微生物腐蚀行为的影响

English

Effect of Rare Earth Ce3+ on the Microbial Induced Corrosion Behavior of Aluminum Alloy LY12CZ

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

Effect of Rare Earth Ce³⁺ on the Microbial Induced Corrosion Behavior of Aluminum Alloy LY12CZ

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs