Inhibition of Microbiologically Induced Corrosion

1997 ◽  
pp. 177-188
Author(s):  
J. Telegdi ◽  
J. Beczner ◽  
Zs. Keresztes ◽  
F. H. Kármán ◽  
E. Kálmán
Keyword(s):  
Microbiologically Induced Corrosion

scholarly journals Antimicrobial Activity and Degradation of Superhydrophobic Magnesium Substrates in Bacterial Media

Metals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1100
Author(s):  
Alexandre M. Emelyanenko ◽  
Valery V. Kaminsky ◽  
Ivan S. Pytskii ◽  
Kirill A. Emelyanenko ◽  
Alexander G. Domantovsky ◽  
...  
Keyword(s):  
Barrier Properties ◽  
Sodium Polyphosphate ◽  
Continuous Contact ◽  
Superhydrophobic Coatings ◽  
High Level ◽  
Corrosive Environments ◽  
Microbiologically Induced Corrosion ◽  
Phosphate Buffered Saline ◽  
Controllable Degradation ◽  
Dispersion Composition

The interest in magnesium-based materials is promoted by their biocompatibility, their bioresorbability, and their recently discovered antibacterial potential. Until now, the widespread use of magnesium alloys in different corrosive environments was inhibited by their weakly controllable degradation rate and poorly understood microbiologically induced corrosion behavior. To better understand the degradation and usability of magnesium-based alloys, in this study we have fabricated superhydrophobic coatings on a magnesium-based alloy, and analyzed the behavior of this alloy in bacterial dispersions of Pseudomonas aeruginosa and Klebsiella pneumoniae cells in phosphate-buffered saline. It was shown that the immersion of such coatings in bacterial dispersions causes notable changes in the morphology of the samples, dependent on the bacterial dispersion composition and the type of bacterial strain. The interaction of the superhydrophobic coatings with the bacterial dispersion caused the formation of biofilms and sodium polyphosphate films, which provided enhanced barrier properties in magnesium dissolution and hence in dispersion medium alkalization, eventually leading to the inhibition of magnesium substrate degradation. The electrochemical data obtained for superhydrophobic samples in continuous contact with corrosive bacterial dispersions for 48 h indicated a high level of anticorrosion protection.

Overcoming Technical Limitations in Identifying and Characterizing Critical Complex Corrosion

2012 ◽  
Author(s):  
Shahani Kariyawasam ◽  
Patrick Yeung ◽  
Stuart Clouston ◽  
Geoffrey Hurd
Keyword(s):  
Management Program ◽  
Pipeline System ◽  
Root Cause ◽  
Signal Characteristics ◽  
Key Characteristics ◽  
Critical Defect ◽  
External Corrosion ◽  
Failure Location ◽  
Microbiologically Induced Corrosion ◽  
Technology Processes

In 2009 a pipeline within the TransCanada pipeline system experienced a rupture. As this pipeline was already under a rigorous In Line Inspection (ILI) based corrosion management program this failure led to an extensive root cause analysis. Even though the hazard causing the failure was microbiologically induced corrosion (MIC) under tape coating, the more troubling question was “Why had the severity of this anomaly not been determined by the ILI based corrosion management program?” This led to an investigation of what key characteristics of the ILI signals resulting from areas of “complex corrosion” are more difficult to correctly interpret and size and furthermore where the line condition is such that manual verification is needed. By better understanding the limitations of the technology, processes used, and the critical defect signal characteristics, criteria were developed to ensure that “areas of concern” are consistently identified, manually verified and therefore the sizing is validated at these potentially higher risk locations. These new criteria were applied on ILI data and then validated against in-the-ditch measurements and a hydrotest. This process in conjunction with optimization of ILI sizing algorithms enabled the operator to overcome some of the known challenges in sizing areas of complex corrosion and update its corrosion management process to improve the detection and remediation of critical defects. This paper describes this investigation of the failure location, development of the complex corrosion criteria, and the validation of effectiveness of the criteria. The criteria are focused on external corrosion and have been currently validated on pipelines of concern. Application to other lines should be similarly validated.

scholarly journals Impact of commonly used Ag-Cu ion doses on Desulfovibrio sp.: growth and microbiologically induced corrosion against stainless steel

2020 ◽  
Vol 82 (5) ◽  
pp. 940-953
Author(s):  
S. Arkan-Ozdemir ◽  
N. Cansever ◽  
E. Ilhan-Sungur
Keyword(s):  
Stainless Steel ◽  
Corrosion Rate ◽  
Inductively Coupled Plasma ◽  
Extracellular Polymeric Substances ◽  
Cooling Water ◽  
Optical Emission ◽  
Emission Spectrometry ◽  
Inductively Coupled ◽  
Microbiologically Induced Corrosion ◽  
Cu Ions

Abstract Ag-Cu ions in cooling water may inhibit the activity of sulfate-reducing bacteria and therefore provide solutions to microbiologically induced corrosion (MIC) problems, mainly caused by Desulfovibrio sp. To investigate this, the MIC behavior of Desulfovibrio sp. on 316L stainless steel in terms of growth and extracellular polymeric substances (EPS) production was investigated in the presence of Ag-Cu ions. Laboratory-scale systems were set up with final concentrations of 0.13 ppm Ag and 0.3 ppm Cu ions, as they are the frequently used doses for cooling waters, and operated over 720 hours. The corrosion rate was evaluated by gravimetric assay, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) analyses. The growth of Desulfovibrio sp. was assessed by bacterial counting and EPS production. Ag-Cu ions in the biofilm were assessed by inductively coupled plasma - optical emission spectrometry (ICP-OES) and EDS-elemental mapping analyses. It was concluded that the ion concentrations used caused an increase in EPS production, especially of protein. The corrosion rate of the metal by Desulfovibrio sp. in the presence of ions was detected as being 29 times higher than that in the sterile medium with the ions after 720 hours. The results suggested that Desulfovibrio sp. exhibited more corrosive behavior in the presence of non-toxic concentrations of Ag-Cu ions.

scholarly journals Biosurfactants: Eco-Friendly and Innovative Biocides against Biocorrosion

2020 ◽  
Vol 21 (6) ◽  
pp. 2152 ◽  
Author(s):  
Grażyna Płaza ◽  
Varenyam Achal
Keyword(s):  
Environmental Problems ◽  
Industrial Equipment ◽  
Microbiologically Induced Corrosion

Corrosion influenced by microbes, commonly known as microbiologically induced corrosion (MIC), is associated with biofilm, which has been one of the problems in the industry. The damages of industrial equipment or infrastructures due to corrosion lead to large economic and environmental problems. Synthetic chemical biocides are now commonly used to prevent corrosion, but most of them are not effective against the biofilms, and they are toxic and not degradable. Biocides easily kill corrosive bacteria, which are as the planktonic and sessile population, but they are not effective against biofilm. New antimicrobial and eco-friendly substances are now being developed. Biosurfactants are proved to be one of the best eco-friendly anticorrosion substances to inhibit the biocorrosion process and protect materials against corrosion. Biosurfactants have recently became one of the important products of bioeconomy with multiplying applications, while there is scare knowledge on their using in biocorrosion treatment. In this review, the recent findings on the application of biosurfactants as eco-friendly and innovative biocides against biocorrosion are highlighted.

scholarly journals Biodegradation of biodiesel and microbiologically induced corrosion of 1018 steel by Moniliella wahieum Y12

2016 ◽  
Vol 108 ◽  
pp. 122-126 ◽  
Author(s):  
Travers H. Ching ◽  
Brandon A. Yoza ◽  
Ruijin Wang ◽  
Stephen Masutani ◽  
Stuart Donachie ◽  
...  
Keyword(s):  
Microbiologically Induced Corrosion
Sign in / Sign up

Export Citation Format

Share Document