scholarly journals Contribution to the Study of Biotechnological Control Techniques Applied Against Biocorrosion Oil Installations

2021 ◽  
Vol 72 (3) ◽  
pp. 10-21
Author(s):  
Faiza Khoukhi ◽  
Nacer-Eddine Djelali ◽  
Salima Kebouche ◽  
Mohamed Lamine Gana
Keyword(s):  
Green Algae ◽  
Electrochemical Impedance ◽  
Electrochemical Analysis ◽  
Open Circuit ◽  
Microbiologically Influenced Corrosion ◽  
Purification Method ◽  
Sulfate Reducing ◽  
Chemical Physic ◽  
Reducing Bacteria

The biological activity of oil extracted from green algae has long been known, but evaluation of bimolecular activities contained in this oil on an industrial scale, especially in the oil industry, was the objective of our research project. The first stapes of this study is to extract the essential oil from green algae marine Ulva Lactuca in our region, obtained by extraction/purification method based on hydro distillation and methanol extraction, the work performed at the laboratories of Sonatrach (SH/DTD/AUI/CEM). The second stapes is to evaluate the potential of these algae extracts on microbiologically influenced corrosion. After chemical-physic characterization of two bio naturals products A and B, we test their effectiveness as a bactericide on bacterial corrosion of carbon steel in water contained sulfate reducing bacteria by electrochemical analysis techniques (Open-circuit potential/OCP and Electrochemical Impedance Spectroscopy/EIS).

The Use of Quaternary Phosphonium Compounds as Antibacterial Corrosion Inhibitors for Low-Alloy Steel

CORROSION ◽  
10.5006/2692 ◽  
2018 ◽  
Vol 74 (6) ◽  
pp. 694-704 ◽  
Author(s):  
B.G. Pound ◽  
P. Cox ◽  
K.E. Mortelmans
Keyword(s):  
Alloy Steel ◽  
Corrosion Inhibitors ◽  
Electrochemical Impedance ◽  
Microbiologically Influenced Corrosion ◽  
Low Alloy Steel ◽  
Sulfate Reducing ◽  
Phosphonium Chloride ◽  
Triphenyl Phosphonium ◽  
Acid Producing Bacteria ◽  
Reducing Bacteria

Triphenyl-based quaternary phosphonium compounds were evaluated as corrosion inhibitors with biocidal properties for controlling microbiologically influenced corrosion. Several compounds displayed biocidal activity for acid-producing bacteria or for sulfate-reducing bacteria, but not both. Electrochemical impedance spectroscopy was used to examine the effect of the compounds on the corrosion behavior of a low-alloy steel Fe-Ni-Cr-Mo (HY-80) in deaerated artificial seawater with and without bacteria present. The performance of the compounds as corrosion inhibitors appeared to be governed by steric factors. Tetraphenyl phosphonium chloride and cinnamyl triphenyl phosphonium chloride were effective as antibacterial corrosion inhibitors.

Application of Electrochemical Techniques to Characterization of the Corrosion Behaviors of GW63 Alloys

2007 ◽  
Vol 546-549 ◽  
pp. 571-574
Author(s):  
Xing Wu Guo ◽  
Jian Wei Chang ◽  
Shang Ming He ◽  
Peng Huai Fu ◽  
Wen Jiang Ding
Keyword(s):  
Electrochemical Impedance ◽  
Electrochemical Techniques ◽  
Open Circuit ◽  
Cyclic Polarization ◽  
Time Curve ◽  
Completely Monotonic ◽  
Treatment Conditions ◽  
Impedance Variation ◽  
Corrosion Behaviors

The corrosion behavior of GW63 (Mg-6wt.%Gd-3wt.%Y-0.4wt.%Zr) alloys in 5% NaCl aqueous solution has been investigated by PARSTAT 2273 instrument. The Open Circuit Potential (ECORR) vs. time curve, cyclic polarization (Pitting Scans) curve and Electrochemical Impedance Spectroscopy (EIS) was measured for the GW63 alloys in as-cast and T6 heat treatment conditions. The EIS results indicated that the tendency of impedance variation for as-cast condition was monotonic decreasing, however, the tendency of variation for T6 condition was not completely monotonic but the total tendency was decreasing. The values of impedance of GW63 alloy at 0.1 Hz are about 103 ohm-cm2 for as-cast and T6 condition.

Corrosion Behavior of Low Nickel Alloy High Strength Steel in Seawater Containing Sulfate-Reducing Bacteria

2011 ◽  
Vol 368-373 ◽  
pp. 42-47
Author(s):  
Fu Shao Li ◽  
Mao Zhong An ◽  
Dong Xia Duan
Keyword(s):  
Nickel Alloy ◽  
High Strength Steel ◽  
Culture Medium ◽  
Electrochemical Impedance ◽  
High Strength ◽  
Sulfate Reducing Bacteria ◽  
Iron Sulfides ◽  
Active Dissolution ◽  
Sulfate Reducing ◽  
Reducing Bacteria

Corrosion behaviors of low nickel alloy high strength steel (LNAHSS) was studied by electrochemical impedance spectroscopy and scanning electron microscopy when the coupons of LNAHSS were exposed to the seawater culture media. As the results, LNAHSS was uniformly corroded in the fresh sterilized culture medium in a mode of active dissolution; in the culture medium with sulfate-reducing bacteria (SRB), LNAHSS was protected by the iron sulfides layer to some extent in the early stage of exposure, but severely localized corrosion subsequently occurred resulting from the localized breakdown of iron sulfides layer. So, in risks estimation, special precautions should be taken when LNAHSS serves in the environments containing SRB as the localized area can become the tress raiser.

scholarly journals Effect of Sulfate-Reducing Bacteria (SRB) on the Corrosion of Buried Pipe Steel in Acidic Soil Solution

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 625
Author(s):  
Lijuan Chen ◽  
Bo Wei ◽  
Xianghong Xu
Keyword(s):  
Soil Solution ◽  
Steel Surface ◽  
Pipeline Steel ◽  
Electrochemical Techniques ◽  
Sulfate Reducing Bacteria ◽  
Acidic Soil ◽  
Microbiologically Influenced Corrosion ◽  
Soil Environment ◽  
Sulfate Reducing ◽  
Reducing Bacteria

The influence of sulfate-reducing bacteria (SRB) on the corrosion behaviors of X80 pipeline steel was investigated in a soil environment by electrochemical techniques and surface analysis. It was found that SRB grew well in the acidic soil environment and further attached to the coupon surface, resulting in microbiologically influenced corrosion (MIC) of the steel. The corrosion process of X80 steel was significantly affected by the SRB biofilm on the steel surface. Steel corrosion was inhibited by the highly bioactive SRB biofilm at the early stage of the experiment, while SRB can accelerate the corrosion of steel at the later stage of the experiment. The steel surface suffered severe pitting corrosion in the SRB-containing soil solution.

Zwitterionic molecule layer for inhibiting microbial corrosion of copper alloy

2018 ◽  
Vol 65 (1) ◽  
pp. 46-52
Author(s):  
Fengling Xu ◽  
Zhenghui Qiu ◽  
Ri Qiu ◽  
Jiadong Yang ◽  
Cunguo Lin
Keyword(s):  
Electrochemical Impedance ◽  
Chemical Vapor ◽  
Attenuated Total Reflectance ◽  
Microbial Corrosion ◽  
Content Type ◽  
Sulfate Reducing ◽  
Angle Measurements ◽  
Static Contact ◽  
Contact Angle Measurements ◽  
Reducing Bacteria

Purpose For mitigating biocorrosion induced by sulfate-reducing bacteria (SRB) in seawater, the zwitterionic molecule layer (ZML) of poly (sulfobetaine methacrylate) is grafted onto B10 surface by chemical vapor deposition and surface-initiated atom transfer radical polymerization. Design/methodology/approach Energy-dispersive spectroscopy-attenuated total reflectance Fourier transform infrared spectroscopy and static contact angle measurements are used to characterize the as-formed layer. Findings After surface modification, B10 can significantly reduce SRB adhesion, demonstrating the good antifouling property. Further, the biocorrosion inhibition is investigated by potentiodynamic polarization and electrochemical impedance spectroscopy, indicating that ZML exhibits high resistance to biocorrosion with inhibition efficiency of approximately 90 per cent. Originality/value ZML performs a dual feature, i.e. antifouling film and corrosion inhibitor, for the biocorrosion inhibition.

scholarly journals Physicochemical Characterization of Home-Made Soap from Waste-Used Frying Oils

Processes ◽  
2020 ◽  
Vol 8 (10) ◽  
pp. 1219
Author(s):  
Bojan Antonić ◽  
Dani Dordević ◽  
Simona Jančíková ◽  
Bohuslava Tremlova ◽  
Ivan Kushkevych
Keyword(s):  
Olive Oil ◽  
Physicochemical Characterization ◽  
Point Of View ◽  
Frying Oils ◽  
Sulfate Reducing ◽  
Processing Plants ◽  
Soap Production ◽  
Reducing Bacteria ◽  
Sample Pair

The study aimed to describe the utilization of waste frying oils, originated mainly from households, in home-made soap production and to emphasize the advantages of soap biodegradation in comparison to biological treatment of oils. The physicochemical analyses of soaps were used to check the differences between the samples made of fresh and fried oils. Significant (p < 0.05) difference between the soaps made of fresh/fried olive oil pair was obtained, while the rapeseed sample pair did not differ significantly (p < 0.05). Malondialdehyde (MDA) exhibited notable differences with an increase from 1.94 μg/g to 2.33 μg/g for olive oil fresh/fried pair and from 3.43 μg/g to 4.10 μg/g for rapeseed–palm oil fresh/fried pair. The studies addressing the soap biodegradation process revealed that soaps are degrading up to four times faster than oils in waste processing plants. Literature data showed the syntrophic ways of soap degradation and degradation solely done by sulfate-reducing bacteria. Obtained results, same as literature data, indicated that soaps produced from fried plant oils represent acceptable products from the economic and environmental point of view. Soap production can be considered one of the possible ways toward reduction of waste oil disposal.

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