Menu
Search
Filters
Close
Menu

51318-11529-Evaluation of macrofouling crevice characteristics in MIC of steel

Picture for Evaluation of macrofouling crevice characteristics in MIC of steel
Available for download

Tests were conducted in simulated water environments with nutrient-rich environments with sulfate reducing bacteria (SRB). Effects of crevice environments, caused by macrofoulers on corrosion and in comparison with biotic condition, were studied.

 

Product Number: 51318-11529-SG
Author: Samanbar Permeh / Bin Li / Mayren Echeverria Boan / Berrin Tansel / Kingsley Lau / Matthew Duncan
Publication Date: 2018
Industries: Highways & Bridges , Science of Corrosion
$0.00
$20.00
$20.00

Recent findings at a Florida bridge showed that submerged steel piles had severe corrosion that appeared to be associated with microbial activity. Localized corrosion cells/pits were of up to 3" in diameter and penetrated through the steel thickness. Bacteria that have commonly been associated with microbially influenced corrosion (MIC) (e.g., sulfate reducing bacteria) were identified in the water samples collected from the bridge site. The water samples also showed high sulfate and chloride levels.

The affected site contained microorganisms that can cause corrosion and as well as heavy marine growth. Although the role of the macrofoulers on the corrosion of the steel piles was not clear, the macrofoulers may have been associated with the corrosion development. It was thought that the effect of localized crevice environments created by the presence of the macrofoulers may support MIC. The objective of this research was to evaluate characteristics of macrofouling crevice environments that can enhance corrosion due to MIC.

Laboratory experiments were conducted in simulated water environments. Tests were conducted with nutrient-rich environments inoculated with sulfate reducing bacteria (SRB). The effect of the physical characteristics of crevice environments, caused by macrofoulers on corrosion and in comparison with biotic condition, was studied. Electrochemical tests included the measurement of open circuit potential (OCP), linear polarization resistance (LPR) and electrochemical impedance spectroscopy (EIS). Effects of parameters (i.e., aerated/ de-aerated conditions) were assessed through the electrochemical testing. In de-aerated environments, MIC due to SRB can be significant regardless of the presence of crevice conditions. In naturally aerated bulk solutions that may not be ideal for SRB, crevice environments may promote SRB proliferation and enhance MIC.

Keywords: MIC, SRB, Crevice, De-aerated and Macrofouler

Recent findings at a Florida bridge showed that submerged steel piles had severe corrosion that appeared to be associated with microbial activity. Localized corrosion cells/pits were of up to 3" in diameter and penetrated through the steel thickness. Bacteria that have commonly been associated with microbially influenced corrosion (MIC) (e.g., sulfate reducing bacteria) were identified in the water samples collected from the bridge site. The water samples also showed high sulfate and chloride levels.

The affected site contained microorganisms that can cause corrosion and as well as heavy marine growth. Although the role of the macrofoulers on the corrosion of the steel piles was not clear, the macrofoulers may have been associated with the corrosion development. It was thought that the effect of localized crevice environments created by the presence of the macrofoulers may support MIC. The objective of this research was to evaluate characteristics of macrofouling crevice environments that can enhance corrosion due to MIC.

Laboratory experiments were conducted in simulated water environments. Tests were conducted with nutrient-rich environments inoculated with sulfate reducing bacteria (SRB). The effect of the physical characteristics of crevice environments, caused by macrofoulers on corrosion and in comparison with biotic condition, was studied. Electrochemical tests included the measurement of open circuit potential (OCP), linear polarization resistance (LPR) and electrochemical impedance spectroscopy (EIS). Effects of parameters (i.e., aerated/ de-aerated conditions) were assessed through the electrochemical testing. In de-aerated environments, MIC due to SRB can be significant regardless of the presence of crevice conditions. In naturally aerated bulk solutions that may not be ideal for SRB, crevice environments may promote SRB proliferation and enhance MIC.

Keywords: MIC, SRB, Crevice, De-aerated and Macrofouler

Product tags
Also Purchased
Picture for 51318-11398- Modeling of Microbiologically Influenced Corrosion (MIC) in the Oil and Gas Industry - Past, Present and Future
Available for download

51318-11398- Modeling of Microbiologically Influenced Corrosion (MIC) in the Oil and Gas Industry - Past, Present and Future

Product Number: 51318-11398-SG
Author: John Wolodko / Tesfaalem Haile / Faisal Khan / Christopher Taylor / Richard Eckert / Seyed Javad Hashemi / Andrea Marciales Ramirez / Torben Lund Skovhus
Publication Date: 2018
$20.00

The objective of this paper is to provide a review of various models and methods that have been developed and applied by both researchers and industry professionals to better understand and predict MIC.
Picture for 08505 MIC of Steels by Iron Reducing Bacteria
Available for download

08505 MIC of Steels by Iron Reducing Bacteria

Product Number: 51300-08505-SG
ISBN: 08505 2008 CP
Author: H. Videla, S. Borgne, C. Panter, and R. Raman
Publication Date: 2008
$20.00
Picture for Quantifying the Risk of MIC
Available for download

51316-7347-Quantifying the Risk of MIC

Product Number: 51316-7347-SG
ISBN: 7347 2016 CP
Author: sarah eisenlord
Publication Date: 2016
$20.00

We describe the advancement of an activity-based quantitative polymerase chain reaction (qPCR) assay which can distinguish live from dead corrosion influencing microorganisms in oil and gas pipeline environments. We discuss the limitations and possible future optimization methods for Propidium monazide-qPCR techniques in the industry.
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support