Control of Microbiologically Influenced Corrosion using Ultraviolet Radiation

Bakar, Aznizam Abu; Ali, Muhammad Khairool Fahmy Mohd; Noor, N. Md; Yahaya, Nordin; Ismail, Mohammad; Rashid, Ahmad Safuan A.

doi:10.17576/jsm-2017-4608-19

Cited by 3 publications

(2 citation statements)

References 11 publications

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“…Prvi način deluje neposredno na ogroženo površino, drugi pa se uporablja za dezinfekcijo medija (vode), v katerem je substrat. Ko z UV-svetlobo delujemo neposredno na površino, se zgodi fizikalni proces, pri katerem ciljni organizmi niso uničeni, ampak se njihov genetski material (DNK) spremeni tako, da je njihova proizvodnja onemogočena [10,29]. Največkrat uporabljena naprava za odstranjevanje korozijskih produktov je UV-laser (Slika 2.11).…”

Section: Uvunclassified

Možni ukrepi za zmanjševanje morske mikrobiološke korozije

Pregeljc,

Imširović,

Ščetinec

et al. 2023

Svet stroj.

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Zahvaljujem se mentorju doc. dr. Urošu Trdanu za strokovno pomoč, usmeritve in odzivnost pri izdelavi zaključne naloge. Hvala tudi somentorju izr. prof. dr. Damjanu Klobčarju, tehničnemu delavcu Jaki Lavrihu in asistentu Mirzi Imširoviću, Laboratoriju za varjenje LAVAR in Laboratoriju za alternativne tehnologije za pomoč pri izvedbi eksperimentalnega dela zaključne naloge.Zahvaljujem se tudi staršem, ostalim članom družine in prijateljem, ki so mi v času študija stali ob strani in me podpirali. iv Izvleček UDK 620.193:628.353.153(043.2) Tek. štev.: UN I/1851 Možni ukrepi za zmanjševanje morske mikrobiološke korozije Klemen PregeljcKljučne besede: biološko obraščanje morska mikrobiološka korozija biofilm premaz maloogljično jeklo aluminijeva zlitinaV zadnjem času se zaradi okoljskega zavedanja in vse večjih finančnih izgub veliko pozornosti posveča vplivu morske mikrobiološke korozije. Le-ta se pojavi, ko na potopljeno površino prilepljeni organizmi tvorijo biofilm, ki z razjedanjem povzroča korozijske napade. Pri blaženju tega pojava so učinkovitejše starejše metode, med katere sodi zaščita z bioaktivnimi sredstvi, ki mikroorganizme uniči z izpuščanjem strupenih snovi. Ne glede na to pa se iščejo okolju prijaznejše alternative. Na tem področju pa razen laboratorijskih uspehov še ni prišlo do praktično izvedljivih rezultatov. V zaključni nalogi smo ugotavljali, kako samopolirni premaz proti obraščanju vpliva na preprečevanje morske mikrobiološke korozije na aluminijevi zlitini 4006 in maloogljičnem jeklu DD11-CAT_A EN10111-2008. Naloga obravnava in ocenjuje razsežnost pojava biofilma, korozije in njenih produktov ter spremembe mase vzorcev. Rezultati kažejo, da je premaz učinkovit, za optimalno delovanje pa je potrebna popolna prekrivnost površine. Korozijska hitrost nepremazanih aluminijevih površin je po enem tednu znašala 0,174 grama na leto, po treh tednih pa 0,406 grama na leto.Vzorci iz nizkoogljičnega jekla so po enem tednu imeli hitrost korozije 5,04 grama na leto, po treh tednih pa 5,33 grama na leto. v

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Section: Uvunclassified

Možni ukrepi za zmanjševanje morske mikrobiološke korozije

Pregeljc,

Imširović,

Ščetinec

et al. 2023

Svet stroj.

View full text Add to dashboard Cite

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“…According to Abu Bakar et. al, most of the SRB species thrive under optimum temperatures ranging from 30-38 °C [14]. This suggests that pH 8.5 is optimal for the SRB to proliferate and grow rapidly at 37˚C temperature.…”

Section: Optimum Ph and Temperature For Sulfate-reducing Bacteria Growthmentioning

confidence: 99%

Bio-corrosion of carbon steel by sulfate reducing bacteria consortium in oil and gas pipelines

Bakar¹,

Ali²,

Noor³

et al. 2017

J. MECH. ENG. SCI.

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This research is aimed to give an overview of the impact of bio-corrosion on carbon steel grade API 5L X-70 immersed in growth medium and exposed to SRB consortium. Simulation of anaerobic corrosion conditions was carried out in a laboratory for 28 days. Raw crude oil gathered from the Baram Delta Operation Terminal was cultured in broth number 1249 (Modified Barr's Medium) to study the effect of bacteria growth upon metal loss. Carbon steel coupons grade X70 were cut to approximately 10mm x 20mm x 5mm and immersed in the cultured broth. During the experiment, the planktonic SRB were enumerated using a counting chamber (direct cell count method) under the electronic microscope at 200x magnification. Results indicated that the optimum pH and temperature for the respected SRB consortium genes were 8.5 and 37 °C, respectively. Metal loss of the corrosion specimen was measured and recorded after retrieval from the immersion period in the medium on a weekly basis prior to SRB inoculation for further analysis. The metal loss values supported that SRB activity can increase the metal loss of carbon steel against time of exposure. Additionally, the FESEM image showed the biofilm formations on the corrosion specimen. Thus, the results could conclude that biocorrosion caused by particular local SRB consortium can be considered as a threat to carbon steel pipelines. Besides, the effect of SRB activity and response towards metallic materials in a dynamic environment is an interesting topic to be studied upon in the future.

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Effect of Different Nanoparticles Silver, Iron Oxide and Titanium Oxide to Control Corrosion by Desulfovibrio Sp.Isolated from Oil Fields

Alsakkaf

Aldosary

El-Komy

et al. 2022

Day 3 Wed, February 23, 2022

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Microbiologically influenced corrosion (MIC), or biocorrosion is a corrosion of metals in environment containing microorganism. The microorganisms can initiate corrosion or accelerate by their metabolic activities. Recently, MIC problems common in oil recovery which depend on seawater injection. Many of researchers have been investigated that Sulfate-reducing bacteria (SRB) is the major groups of microorganisms that cause corrosion. Pitting corrosion and sulfide generation in oil and gas fields are correlated to presence of SRB. Last decade, nanotechnology is alternative biocide of chlorine-free. Metal nanoparticles improve the antimicrobial activity of the metals. The biocidal activity of AgNPs, Fe2O3NPs and TiO2NPs against Desulfovibrio sp. (St.7) at 1 ppm, 50 ppm and 100 ppm concentrations as estimated by cell growth and H2S production was examined. AgNPs and Fe2O3NPs had no significant effect at a low concentration, 1 ppm, on both bacterial growth and sulfide production. Whereas, increasing NPs concentration to 50 ppm and 100 ppm led to a complete inhibition of both growth and sulfide production. TiO2NPs gave complete inhibitory effect on both growth and H2S production by Desulfovibrio sp. (St.7) at all the tested concentrations (1ppm, 50ppm, 100ppm). The study supports the use of such nanoparticles as a green biocide and safe method to control corrosion problem caused by sulphate reducing bacteria.

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Control of Microbiologically Influenced Corrosion using Ultraviolet Radiation

Cited by 3 publications

References 11 publications

Možni ukrepi za zmanjševanje morske mikrobiološke korozije

Možni ukrepi za zmanjševanje morske mikrobiološke korozije

Bio-corrosion of carbon steel by sulfate reducing bacteria consortium in oil and gas pipelines

Effect of Different Nanoparticles Silver, Iron Oxide and Titanium Oxide to Control Corrosion by Desulfovibrio Sp.Isolated from Oil Fields

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