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51313-02853-Bacteria effect on the corrosion resistance of structural metals in water sources and system applications

Picture for Bacteria effect on the corrosion resistance of structural metals in water sources and system applica
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Product Number: 51313-02853-SG
ISBN: 02853 2013 CP
Author: Amir Eliezer
Publication Date: 2013
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A. Eliezer* O. Levak* E. Baram* K. Barri * A. Koritny* M. Schorr** B. Valdez** Y. Shotland*

*Sami Shamoon College of Engineering Beer-Sheva.Israel
**Institute of Engineering University of Baja California Mexicali Mexico.
 

 

Pipe systems are part of our manmade environments. They can be found in urban environment where it is usually used to transfer water or sewage in industrial environment where it can carry hazardous waste (for instance in the chemical industry) or oil and its products in the petroleum industry. Leakage in all pipe system is an unwelcome event. The physical presence of microbial cells on a metal surface as well as their metabolic activities can cause Microbiologically Influenced Corrosion (MIC) or biocorrosion. The presence of bacteria could increase the corrosion rate by tenfold; such corrosion rate can cause failure of pipelines within a year or two. We have tested the idea of “probiotic” bacteria in preventing biocorrosion and in piping i.e. “good bacteria” will generate biofilm inside piping and might inhibit the biocorrosion mediate by MIC. Our long term goal is to develop biological and non-biological ways to control MIC. Towards this goal we have investigated the MIC phenomenon
by testing several parameters such as the effect of different bacteria (Bacillus thuringiensis Staphylococcus aureus and mixture of bacteria). The MIC was studied for Aluminum 5052 and steel St-52 under two incubation conditions. Corrosion was studied by using three different measurements: weight loss Potentiodynamic and Impedance spectroscopy in order to have a comprehensive and accurate data. The result shows that Staphylococcus aureus is more corrosive to steel then Bacillus thuringiensis. We have also found higher corrosion rates at higher temperature (37°C).
The obtained research leads to the point that a further investigation is essential in order to develop protected corrosion controlled water tanks and systems.
 

A. Eliezer* O. Levak* E. Baram* K. Barri * A. Koritny* M. Schorr** B. Valdez** Y. Shotland*

*Sami Shamoon College of Engineering Beer-Sheva.Israel
**Institute of Engineering University of Baja California Mexicali Mexico.
 

 

Pipe systems are part of our manmade environments. They can be found in urban environment where it is usually used to transfer water or sewage in industrial environment where it can carry hazardous waste (for instance in the chemical industry) or oil and its products in the petroleum industry. Leakage in all pipe system is an unwelcome event. The physical presence of microbial cells on a metal surface as well as their metabolic activities can cause Microbiologically Influenced Corrosion (MIC) or biocorrosion. The presence of bacteria could increase the corrosion rate by tenfold; such corrosion rate can cause failure of pipelines within a year or two. We have tested the idea of “probiotic” bacteria in preventing biocorrosion and in piping i.e. “good bacteria” will generate biofilm inside piping and might inhibit the biocorrosion mediate by MIC. Our long term goal is to develop biological and non-biological ways to control MIC. Towards this goal we have investigated the MIC phenomenon
by testing several parameters such as the effect of different bacteria (Bacillus thuringiensis Staphylococcus aureus and mixture of bacteria). The MIC was studied for Aluminum 5052 and steel St-52 under two incubation conditions. Corrosion was studied by using three different measurements: weight loss Potentiodynamic and Impedance spectroscopy in order to have a comprehensive and accurate data. The result shows that Staphylococcus aureus is more corrosive to steel then Bacillus thuringiensis. We have also found higher corrosion rates at higher temperature (37°C).
The obtained research leads to the point that a further investigation is essential in order to develop protected corrosion controlled water tanks and systems.
 

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