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Mechanistic modeling of biocorrosion caused by biofilms of sulfate reducing bacteria and acid producing bacteria
Xu, Dake; Li, Yingchao; Gu, Tingyue; Li, YC (reprint author), Beijing Univ Technol, Coll Mech Engn & Appl Elect Technol, 100 Ping Le Yuan, Beijing 100124, Peoples R China.; Gu, TY (reprint author), Ohio Univ, Inst Corros & Multiphase Technol, Dept Chem & Biomol Engn, Athens, OH 45701 USA.
2016-08-01
Source PublicationBIOELECTROCHEMISTRY
ISSN1567-5394
Volume110Pages:52-58
AbstractBiocorrosion is also known as microbiologically influenced corrosion (MIC). Most anaerobic MIC cases can be classified into two major types. Type I MIC involves non-oxygen oxidants such as sulfate and nitrate that require biocatalysis for their reduction in the cytoplasm of microbes such as sulfate reducing bacteria (SRB) and nitrate reducing bacteria (NRB). This means that the extracellular electrons from the oxidation of metal such as iron must be transported across cell walls into the cytoplasm. Type II MIC involves oxidants such as protons that are secreted by microbes such as acid producing bacteria (APB). The biofilms in this case supply the locally high concentrations of oxidants that are corrosive without biocatalysis. This work describes a mechanistic model that is based on the biocatalytic cathodic sulfate reduction (BCSR) theory. The model utilizes charge transfer and mass transfer concepts to describe the SRB biocorrosion process. The model also includes a mechanism to describe APB attack based on the local acidic pH at a pit bottom. A pitting prediction software package has been created based on the mechanisms. It predicts long-term pitting rates and worst-case scenarios after calibration using SRB short-term pit depth data. Various parameters can be investigated through computer simulation. (C) 2016 Elsevier B.V. All rights reserved.
description.department[xu, dake] chinese acad sci, inst met res, 72 wenhua rd, shenyang 110016, peoples r china ; [li, yingchao] beijing univ technol, coll mech engn & appl elect technol, 100 ping le yuan, beijing 100124, peoples r china ; [gu, tingyue] ohio univ, inst corros & multiphase technol, dept chem & biomol engn, athens, oh 45701 usa
KeywordBiocorrosion Microbiologically Influenced Corrosion Mechanism Model Charge Transfer Mass Transfer
Subject AreaBiochemistry & Molecular Biology ; Life Sciences & Biomedicine - Other Topics ; Biophysics ; Electrochemistry
Indexed Bysci
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/75783
Collection中国科学院金属研究所
Corresponding AuthorLi, YC (reprint author), Beijing Univ Technol, Coll Mech Engn & Appl Elect Technol, 100 Ping Le Yuan, Beijing 100124, Peoples R China.; Gu, TY (reprint author), Ohio Univ, Inst Corros & Multiphase Technol, Dept Chem & Biomol Engn, Athens, OH 45701 USA.
Recommended Citation
GB/T 7714
Xu, Dake,Li, Yingchao,Gu, Tingyue,et al. Mechanistic modeling of biocorrosion caused by biofilms of sulfate reducing bacteria and acid producing bacteria[J]. BIOELECTROCHEMISTRY,2016,110:52-58.
APA Xu, Dake,Li, Yingchao,Gu, Tingyue,Li, YC ,&Gu, TY .(2016).Mechanistic modeling of biocorrosion caused by biofilms of sulfate reducing bacteria and acid producing bacteria.BIOELECTROCHEMISTRY,110,52-58.
MLA Xu, Dake,et al."Mechanistic modeling of biocorrosion caused by biofilms of sulfate reducing bacteria and acid producing bacteria".BIOELECTROCHEMISTRY 110(2016):52-58.
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