Interpreting microbiologically assisted cracking with E-e-pH diagrams
文献类型：期刊论文
| 作者 | Wu, TQ; Sun, C; Ke, W; Wu, TQ (reprint author), Xiangtan Univ, Sch Mat Sci & Engn, Key Lab Mat Design & Preparat Technol Hunan Prov, Xiangtan 411105, Peoples R China. |
| 刊名 | BIOELECTROCHEMISTRY
 |
| 出版日期 | 2018-04-01 |
| 卷号 | 120页码:57-65 |
| 关键词 | Sulfate-reducing Bacteria Stress-corrosion Cracking Near-neutral Ph Duplex Stainless-steel Pseudomonas-aeruginosa Biofilm Desulfovibrio-vulgaris Biofilm X100 Pipeline Steel Carbon-steel Hydrogen Embrittlement Anodic-dissolution |
| ISSN号 | 1567-5394 |
| 英文摘要 | Although many mechanisms have been proposed to explain the microbiologically assisted cracking (MAC) of steel and copper, a theoretical interpretation is necessary. In this paper, we attempt to give a theoretical interpretation of sulfate/nitrate reducing bacteria (SRB/NRB)-assisted cracking using E-e-pH diagrams. Under the combined actions of SRB/NRB and external stress, the cell potential (E-cell) and the corrosion current density of the corrosion reaction increase, such that the corrosion reactions become more thermodynamically favorable. This is the nature of MAC. Nitrate is a far more potent oxidant than sulfate, and thus, the NRB-assisted cracking of iron is a more thermodynamically favorable process than the SRB-assisted cracking. Furthermore, the thermodynamic interpretation is attempted to implicate into the classical stress corrosion cracking mechanisms of pipeline steel. (C) 2017 Elsevier B.V. All rights reserved.; Although many mechanisms have been proposed to explain the microbiologically assisted cracking (MAC) of steel and copper, a theoretical interpretation is necessary. In this paper, we attempt to give a theoretical interpretation of sulfate/nitrate reducing bacteria (SRB/NRB)-assisted cracking using E-e-pH diagrams. Under the combined actions of SRB/NRB and external stress, the cell potential (E-cell) and the corrosion current density of the corrosion reaction increase, such that the corrosion reactions become more thermodynamically favorable. This is the nature of MAC. Nitrate is a far more potent oxidant than sulfate, and thus, the NRB-assisted cracking of iron is a more thermodynamically favorable process than the SRB-assisted cracking. Furthermore, the thermodynamic interpretation is attempted to implicate into the classical stress corrosion cracking mechanisms of pipeline steel. (C) 2017 Elsevier B.V. All rights reserved. |
| 学科主题 | Biochemistry & Molecular Biology ; Biology ; Biophysics ; Electrochemistry |
| 语种 | 英语 |
| 资助机构 | National Natural Science Foundation of China [51601164, 51471176]; China Postdoctoral Science Foundation [2017M622594]; Xiangtan University Foundation [15ZXZ15] |
| 公开日期 | 2018-06-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/79415]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Wu, TQ (reprint author), Xiangtan Univ, Sch Mat Sci & Engn, Key Lab Mat Design & Preparat Technol Hunan Prov, Xiangtan 411105, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Wu, TQ,Sun, C,Ke, W,et al. Interpreting microbiologically assisted cracking with E-e-pH diagrams[J]. BIOELECTROCHEMISTRY,2018,120:57-65. |
| APA | Wu, TQ,Sun, C,Ke, W,&Wu, TQ .(2018).Interpreting microbiologically assisted cracking with E-e-pH diagrams.BIOELECTROCHEMISTRY,120,57-65. |
| MLA | Wu, TQ,et al."Interpreting microbiologically assisted cracking with E-e-pH diagrams".BIOELECTROCHEMISTRY 120(2018):57-65. |
入库方式： OAI收割
来源：金属研究所
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