Sulphate-reducing bacterial activity as a parameter to predict localized corrosion of stainless alloys

Based on an understanding of the mechanism of localized corrosion and microbial growth kinetics, sulphate-reducing bacterial (SRB) activity is believed to be the key parameter influencing SRB corrosion of stainless alloys. Accelerated corrosion tests were used to examine the relationship between SRB...

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Bibliographic Details
Published inCorrosion science Vol. 42; no. 5; pp. 897 - 912
Main Authors Angell, P., Urbanic, K.
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 01.05.2000
Elsevier Science
Subjects
Applied sciences
Bacteria
Carbon
Composition effects
Computer simulation
Corrosion
Corrosion environments
Exact sciences and technology
Growth kinetics
Mathematical models
Metal testing
Metals. Metallurgy
Microbially influenced corrosion
Modelling
Nitrogen
Pitting
Stainless alloys
Sulfur compounds
Sulphate-reducing bacteria
Sulphate-reducing bacteria
Modelling
Stainless alloys
Microbially influenced corrosion
Corrosion mechanism
Corrosion
Stainless steel
Bacteria
Steel
Bacterial corrosion
Experimental study
Modeling
Biological activity
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Summary:Based on an understanding of the mechanism of localized corrosion and microbial growth kinetics, sulphate-reducing bacterial (SRB) activity is believed to be the key parameter influencing SRB corrosion of stainless alloys. Accelerated corrosion tests were used to examine the relationship between SRB colonization and localized corrosion susceptibility of stainless alloy heat exchanger tubes in fresh water. Experimental conditions simulated those of the natural systems. Data were collected to develop a model to predict microbially-influenced corrosion (MIC) for the CHECWORKS™ cooling water module. These tests found no correlation between bacterial numbers and pit initiation. However, there did appear to be a correlation between bacterial activity (causing a decrease in corrosion potential, as a function of sulphide production), and pit initiation. Since no practical method for measuring SRB activity at plant sites is available, it is argued that assimilable carbon, nitrogen and sulphate concentrations, as well as flow rate, may be practical input parameters for CHECWORKS™.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0010-938X
1879-0496
DOI:10.1016/S0010-938X(99)00116-X