scholarly journals Factors of effect on the corrosion destruction of metal of underground pipelines

2019 ◽  
Vol 6 (1) ◽  
pp. 30-33
Author(s):  
M. S. Polutrenko ◽  
Ya. T. Fedorovych ◽  
K. M. Dzudzylo
Keyword(s):  
Weight Loss ◽  
Gravimetric Method ◽  
Corrosion Damage ◽  
Metal Corrosion ◽  
Metal Exposure ◽  
Sulfate Ions ◽  
Sulfate Reducing ◽  
High Soil Moisture ◽  
Underground Pipelines ◽  
Reducing Bacteria

A set of studies was conducted to determine the main factors influencing the corrosion destruction of metal in underground pipelines in two studied sections of the Pasichna-Tysmenitsa gaspipeline, covering definitions of active acidity, mass fraction of moisture, the presence of sulfate ions, and metal weight loss determined by the gravimetric method. It has been established that the pipeline in the studied sections of the route is laid in a soil of uniform acidity, which is low in pH acidic, which indicates corrosiveness of the soil in relation to steel. High soil moisture from the bottom of the pipeline in two sections of the route 18.21and 19.73 %, respectively, contributed to increased corrosion damage of the metal. Corrosion of the studied soils was carried out on the basis of certain metal weight loss. It was established that the soils on the studied sections of the route, the distance between which was about 1000 m, relate to soils with a high and normal degree of corrosivity. High corrosion activity is characteristic of the soil along the lower generatrix of the pipeline, which leads to an increase in the corrosion rate of the metal of underground pipelines in this zone. The intensification of corrosion processes in the soil adjacent to the pipeline, with an increase in metal exposure time in soil, has been established. The presence of sulfate ions in soil water extracts leads to the development of biocorrosion with the participation of sulfate-reducing bacteria, which indicated the formation of biogenic hydrogensulfide.

scholarly journals Influence of soil microorganisms on metal corrosion of underground pipelines

2018 ◽  
Vol 62 (2) ◽  
pp. 65-70 ◽  
Author(s):  
M. Polutrenko ◽  
P. Maruschak ◽  
A. Tymoshenko ◽  
A. Sorochak
Keyword(s):  
Oil And Gas ◽  
Surface Film ◽  
Corrosion Damage ◽  
Metal Corrosion ◽  
Localized Corrosion ◽  
Sulfate Reducing ◽  
Surface Analysis Techniques ◽  
Steel 17G1s ◽  
Anaerobic Corrosion ◽  
Reducing Bacteria

Abstract There have been revealed and summarized the regularities in biocorrosion of steel 17G1S-U, which is traditionally used for manufacturing oil and gas mains. The basic regularities of biocorrosion processes in the 17G1S-U pipe steel under the influence of SRB Desulfovibrio Sp. strains Kyiv-10 was obtained by weight-loss testing and surface analysis techniques. Effective inhibitors are proposed, which allow protecting steel 17G1S-U against the development of anaerobic corrosion under the influence of sulfate-reducing bacteria (SRB). The effectiveness of inhibitors is estimated by the degree of their protective effect. The porous structure of the surface film contributes to the initiation of localized corrosion. Damage analysis of the specimen surface corroded under different test conditions was performed.

Microbiological Corrosion in Waterfloods

CORROSION ◽  
1961 ◽  
Vol 17 (8) ◽  
pp. 386t-390t ◽  
Author(s):  
J. M. SHARPLEY
Keyword(s):  
Corrosion Damage ◽  
Field Evaluation ◽  
Suggested Method ◽  
Microbial Flora ◽  
Microbiological Corrosion ◽  
Sulfate Reducing ◽  
Bacterial Corrosion ◽  
Reducing Bacteria ◽  
Evaluation Techniques

Abstract It is commonly observed that most bacterial corrosion in waterfloods occurs as pit corrosion. A hypothesis has been advanced to explain a portion of the mechanism underlying bacterial pit corrosion and a suggested method has been presented for determining the possible relationships between the general microbial flora and microorganisms capable of participating in pit corrosion. Topics discussed include role of sulfate-reducing bacteria, correlation between bacteriological examinations and corrosion damage, cultural techniques, laboratory and field evaluation techniques, and detection of sessile microorganisms. 3.3.4, 3.2.2, 8.4.3

scholarly journals Microbial Corrosion of API 5L X-70 Carbon Steel by ATCC 7757 and Consortium of Sulfate-Reducing Bacteria

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Arman Abdullah ◽  
Nordin Yahaya ◽  
Norhazilan Md Noor ◽  
Rosilawati Mohd Rasol
Keyword(s):  
Weight Loss ◽  
Carbon Steel ◽  
Corrosion Rate ◽  
Sulfate Reducing Bacteria ◽  
Desulfovibrio Vulgaris ◽  
Corrosion Morphology ◽  
Sulfate Reducing ◽  
Weight Loss Method ◽  
Loss Method ◽  
Reducing Bacteria

Various cases of accidents involving microbiology influenced corrosion (MIC) were reported by the oil and gas industry. Sulfate reducing bacteria (SRB) have always been linked to MIC mechanisms as one of the major causes of localized corrosion problems. In this study, SRB colonies were isolated from the soil in suspected areas near the natural gas transmission pipeline in Malaysia. The effects of ATCC 7757 and consortium of isolated SRB upon corrosion on API 5L X-70 carbon steel coupon were investigated using a weight loss method, an open circuit potential method (OCP), and a potentiodynamic polarization curves method in anaerobic conditions. Scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) were then used to determine the corrosion morphology in verifying the SRB activity and corrosion products formation. Results from the study show that the corrosion rate (CR) of weight loss method for the isolated SRB is recorded as 0.2017 mm/yr compared to 0.2530 mm/yr for ATCC 7757. The Tafel plot recorded the corrosion rate of 0.3290 mm/yr for Sg. Ular SRB and 0.2500 mm/yr forDesulfovibrio vulgaris. The results showed that the consortia of isolated SRB were of comparable effects and features with the single ATCC 7757 strain.

The Disinfection Efficacy of Chlorine on Sulfate-Reducing Bacteria and Iron Bacteria in Water Supply Systems

2013 ◽  
Vol 316-317 ◽  
pp. 657-660
Author(s):  
Bei Meng Qi ◽  
Bei Jia Wang ◽  
Chen Guang Wu ◽  
Yi Xing Yuan
Keyword(s):  
Water Supply ◽  
Sulfate Reducing Bacteria ◽  
Metal Corrosion ◽  
Water Supply Systems ◽  
Supply Networks ◽  
Minimum Requirement ◽  
Iron Reducing Bacteria ◽  
Sulfate Reducing ◽  
Reducing Bacteria ◽  
Supply Systems

Sulfate reducing bacteria (SRB) and iron reducing bacteria (IRB) that widely exist in water supply networks are the main microorganisms leading to metal corrosion in pipelines. Chlorine is widely used in drinking water supply systems. The concentration of chlorine with SRB declined rapidly after 10 mins and reached 0 mg/L finally whereas it decreased more slowly with IRB. If the concentration of chlorine is lower than 0.2mg/L, IRB cannot be sterilized. It indicates that at the end of water pipes where the concentration of chlorine is required to be 0.05mg/L, chlorine is not effective since the concentration is below the minimum requirement of removing IRB

scholarly journals Reduction of perchlorate ions by the sulfate-reducing bacteria Desulfotomaculum sp. and Desulfovibrio desulfuricans

2020 ◽  
Vol 11 (2) ◽  
pp. 278-282
Author(s):  
N. S. Verkholiak ◽  
T. B. Peretyatko ◽  
A. A. Halushka
Keyword(s):  
Sewage Treatment ◽  
Desulfovibrio Desulfuricans ◽  
Sulfate Reducing Bacteria ◽  
Inhibitory Effect ◽  
Electron Acceptors ◽  
Wood Chips ◽  
Sulfate Ions ◽  
Sulfate Reducing ◽  
Perchlorate Ion ◽  
Reducing Bacteria

The usage of microorganisms to clean the environment from xenobiotics, in particular chlorine-containing ones, is a promising method of detoxifying the contaminated environment. Sulfate-reducing bacteria Desulfovibrio desulfuricans Ya-11, isolated from Yavoriv Lake, and Desulfotomaculum AR1, isolated from the Lviv sewage treatment system, are able to grow under conditions of environmental contamination by aromatic compounds and chlorine-containing substances. Due to their high redox potential, chlorate and perchlorate ions can be ideal electron acceptors for the metabolism of microorganisms. To test the growth of the tested microorganisms under the influence of perchlorate ions, bacteria were cultured in modified Postgate C medium with ClO4–. Biomass was determined turbidimetrically, the content of sulfate ions and hydrogen sulfide – photoelectrocolorimetrically, the content of perchlorate ions – permanganatometrically. The study of the ability of sulfate-reducing bacteria Desulfotomaculum AR1 and D. desulfuricans Ya-11 to grow in a medium with perchlorate ions as electron acceptors showed the inhibitory effect of ClO4– on sulfate ion reduction by bacteria. Bacteria Desulfotomaculum AR1 and D. desulfuricans Ya-11 are able to grow in environments with aromatic hydrocarbons, in particular toluene. The possibility of the growth of sulfate-reducing bacteria in the presence of toluene as an electron donor and perchlorate ions as an electron acceptor was investigated. The efficiency of perchlorate ion utilization by sulfate-reducing bacteria Desulfotomaculum AR1 and D. desulfuricans Ya-11 was about 90 %. The effect of molybdenum on the reduction of perchlorate ions by Desulfotomaculum AR1 is shown in the paper. Immobilization of bacteria Desulfotomaculum AR1 and D. desulfuricans Ya-11 was carried out in 3% agar and on wood chips. The ability of bacteria, immobilized on these media, to purify the aqueous medium from perchlorate ions was investigated. Reduction of perchlorate ions is more efficiently performed by cells of Desulfotomaculum AR1 and D. desulfuricans Ya-11 bacteria immobilized in agar than on wood chips. Sulfate-reducing bacteria Desulfotomaculum AR1 and D. desulfuricans Ya-11 are able to use perchlorate ions as electron acceptors, purifying the polluted aquatic environment from these pollutants.

scholarly journals Destruction of toluene and xylene by sulfatе-reducing bacteria

2019 ◽  
Vol 30 (2) ◽  
pp. 95-100 ◽  
Author(s):  
N. S. Verkholiak ◽  
T. B. Peretyatko
Keyword(s):  
Hydrogen Sulfide ◽  
Aromatic Hydrocarbons ◽  
Aromatic Compounds ◽  
Sulfate Reducing Bacteria ◽  
Control Medium ◽  
Sulfate Ion ◽  
Sulfate Ions ◽  
Sulfate Reducing ◽  
Reducing Bacteria ◽  
Growth Of Bacteria

As a result of human activity aromatic hydrocarbons enter the environment in large quantities, contaminating it. Dropping of insufficiently treated wastewater drains considerably decrease the quality of water. Quite effective biological methods of purification of contaminated environment are the usage of microorganisms. Prospective microorganisms for sewage treatment are sulfate-reducing bacteria. The purpose of the work was to investigate the ability of sulfate-reducing bacteria to use xylene and toluene as a source of carbon under different cultivation conditions.  The study objects were sulfate-reducing bacteria Desulfotomaculum AR1 and Desulfovibrio desulfuricans Ya-11. The biomass of bacteria was determined turbidimetrically, the content of sulfate ion and hydrogen sulfide – photometrically in the culture fluid. The content of fumarate was determined by the method of high-performance liquid chromatography. The ability of Desulfotomaculum AR1 and D. desulfuricans Ya-11 bacteria to use toluene and xylene as the sole source of carbon and energy has been established. In the toluene environment, a better growth of bacteria was observed. A comparison was made between the efficiency of the reduction of sulfate ions and the growth of bacteria in the control medium and the medium with aromatic compounds. The efficiency of sulfate ions reduction was sufficiently high in the control medium, whereas in the toluene/xylene media the efficiency of sulfate utilization and hydrogen sulfide accumulation was lower compared to the control parameters. The growth of Desulfotomaculum AR1 and D. desulfuricans Ya-11 sulfate-reducing bacteria was investigated in xylene and toluene media in the presence/absence of fumarate. According to the results of the studies, the best growth of the tested bacteria was observed in the medium with aromatic compounds in the presence of fumarate and sulfate ion. Efficiency of use of fumarate in the medium with toluene with bacteria Desulfotomaculum AR1 was more than 90 %. Fumarate can be used by sulfate-reducing bacteria as a source of carbon, donor and acceptor of electrons. Fumarate is most likely to inhibit sulfate reduction in Desulfotomaculum AR1 and D. desulfuricans Ya-11 bacteria, as indicated by studies showing that sulfate reduction efficiency in lactate, fumarate, and sulfate ion media was half that of control. Sulfate-reducing bacteria are capable to anaerobically degrade aromatic hydrocarbons in the presence of sulfate ions as terminal electron acceptors. The ability of sulfate-reducing bacteria Desulfotomaculum AR1 and D. desulfuricans Ya-11 to use the aromatics of the BTEХ – toluene, xylene and sulfate-ions, makes them promising at the biological purification step of contaminated wastewater from these pollutants.

scholarly journals SYNTHESIS AND STUDY OF INHIBITORY PROPERTIES OF QATERNARY AMMONIUM SALTS BASED ON AMINOETHYLETHANOLAMINE

2017 ◽  
Vol 60 (3) ◽  
pp. 72
Author(s):  
Svetlana S. Katkova ◽  
Vera I. Levashova
Keyword(s):  
Acid Corrosion ◽  
Protective Action ◽  
Antibacterial Properties ◽  
Gravimetric Method ◽  
Sulfate Reducing Bacteria ◽  
Ammonium Salts ◽  
Effect Of Temperature ◽  
Molar Ratio ◽  
Sulfate Reducing ◽  
Reducing Bacteria

This article is devoted to the topical today biological corrosion problem of steel under the conditions of production, transportation and refining. The characteristics of corrosion caused by the vital activity of sulfate-reducing bacteria were analyzed. The article seeks to examine the effectiveness of new ammonium salts based on aminoethylethanolamine as reagents possessing inhibitory and antibacterial properties. The main content of the research is the analysis of the synthesis of new compounds based on ammonium aminoethylethanolamine and benzyl chloride. The optimal conditions of the synthesis were determined on the basis of the effect of temperature, reaction time, molar ratio of the final product output. The considerable attention was devoted to testing obtained new metal ammonium salts as acid corrosion inhibitors, including determining the corrosion rate and the degree of protection.  The comparison of the results of the evaluation of the inhibitory properties of synthesized salts is presented using the rate indicator of corrosion "Monicor-2M" and gravimetric method. The results of the evaluation of bactericidal activity of the synthesized compounds were obtained with the determining the degree of suppression of sulfate-reducing bacteria SRB culture using isolated from natural sources and identified as Desulfovibrio desulfuricans. The results showed a high level of protective action of synthesized salts and their possible use in the oil industry.Forcitation:Katkova S.S., Levashova V.I. Synthesis and study of inhibitory properties of qaternary ammonium salts based on aminoethylethanolamine. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 3. P. 72-76.

scholarly journals Comparison of 304 SS, 2205 SS, and 410 SS Corrosion by Sulfate-Reducing Desulfovibrio ferrophilus

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Junlei Wang ◽  
Hongfang Liu ◽  
Pruch Kijkla ◽  
Sith Kumseranee ◽  
Suchada Punpruk ◽  
...  
Keyword(s):  
Weight Loss ◽  
Microbiologically Influenced Corrosion ◽  
Significant Weight Loss ◽  
Electrochemical Tests ◽  
Sulfate Reducing ◽  
Large Weight Loss ◽  
Stainless Steel 304 ◽  
Corrosion Behaviors ◽  
Pit Depth ◽  
Reducing Bacteria

Three types of stainless steel (304 SS, 410 SS, and 2205 SS) were evaluated for their corrosion behaviors in microbiologically influenced corrosion (MIC) by Desulfovibrio ferrophilus strain IS5, a relatively new and very corrosive sulfate-reducing bacteria (SRB) strain. The incubation lasted for 7 days in enriched artificial seawater at 28°C and the results showed that 410 SS had a rather large weight loss (6.2 mg/cm2) and a maximum pit depth (118 µm), but 2205 SS and 304 SS did not suffer from significant weight loss or pitting. Electrochemical tests indicated that 2205 SS was slightly more resistant to SRB MIC than 304 SS, while 410 SS was far less resistant.

scholarly journals Crude oil-utilizing strain Desulfovibrio vulgaris D107G3, a mesophilic sulfate-reducing bacterium isolated from Bach Ho gas-oil field in Vung Tau, Vietnam

2020 ◽  
Vol 12 (2) ◽  
pp. 193-199
Author(s):  
Thi Thu Huyen NGUYEN ◽  
Thi Kim Thoa TRAN ◽  
Thuy Hien LAI
Keyword(s):  
16S Rrna ◽  
Crude Oil ◽  
Sulfate Reducing Bacteria ◽  
Oil Field ◽  
Metal Corrosion ◽  
Desulfovibrio Vulgaris ◽  
Viet Nam ◽  
Gas Oil ◽  
Sulfate Reducing ◽  
Reducing Bacteria

Some of anaerobic, mesophilic sulfate-reducing bacteria that produce H2S and cause microbial metal corrosion can degrade crude oil in anaerobic conditions. In this study, a mesophilic sulfate-reducing bacterial strain D107G3 isolated from Bach Ho gas-oil field in Vung Tau, Vietnam that is able to utilize crude oil in the anaerobic condition is reported. The strain D107G3 was classified as a Gram-negative bacterium by using Gram staining method. Basing on scanning microscopy observation, the cell of a strain D107G3 had a curved rod shape. The 16S rRNA gene sequence analysis showed that the strain D107G3 was identified as Desulfovibrio vulgaris with 99.7% identity. The suitable conditions for its growth that was determined via estimating its H2S production was the modified Postgate B medium containing 1% (v/v) crude oil, 1% NaCl (w/v), pH 7 and 30°C incubation. In these conditions, the strain D107G3 can consume 11.4 % of crude oil total and oxidize heavy crude oil (≥ C45) for one month at anoxic condition. These obtained results not only contribute to the science but also continue to warn about the dangers of mesophilic sulfate reducing bacteria to the process of crude oil exploitation, use, and storage in Vung Tau, Vietnam. Trong bài báo này, chủng vi khuẩn khử sunphat (KSF) ưa ấm D107G3 phân lập từ giếng khoan dầu khí mỏ Bạch Hổ, Vũng Tàu, Việt Nam có khả năng sử dụng dầu thô trong điều kiện kị khí được công bố. Chủng D107G3 được xác định là vi khuẩn Gram âm nhờ phương pháp nhuộm Gram. Quan sát trên kính hiển vi điện tử quét cho thấy tế bào chủng D107G3 có hình que cong. Kết quả phân tích trình tự gen 16S rRNA đã xác định được chủng D107G3 thuộc loài Desulfovibrio vulgaris với độ tương đồng 99.7%. Thông qua đánh giá lượng H2S tạo thành đã khám phá được điều kiện thích hợp cho sinh trưởng của chủng D107G3: môi trường Postgate B cải tiến chứa 1% (v/v) dầu thô, 1 % NaCl (gL-1), pH 7 và nuôi cấy ở 30°C. Trong điều kiện đó, chủng D107G3 đã sử dụng được 11.4 % hàm lượng dầu tổng số, thành phần dầu bị phân huỷ là các n-parafin có mạch C≥45 sau 1 tháng nuôi cấy kỵ khí. Các kết quả này đóng góp về mặt khoa học và tiếp tục cảnh báo mối nguy hại của KSF ưa ấm đến việc khai thác, sử dụng và bảo quản dầu mỏ ở Vũng Tàu, Việt Nam.

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