Understanding microbially influenced corrosion as biofilm-mediated changes in surface chemistry

Angell, Peter

doi:10.1016/s0958-1669(99)80047-0

Cited by 40 publications

(18 citation statements)

References 14 publications

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“…A thorough knowledge of the causes of microbially influenced corrosion and an efficient and effective means of detecting and preventing corrosion are lacking. It is well recognized that microorganisms are a major cause of corrosion of metal pipes, but despite decades of study it is still not known with certainty how many species of microorganisms contribute to corrosion, how to reliably detect their presence prior to corrosion events, or how to rapidly assess the efficacy of biocides and mitigation procedures (2,5,17,18,23,30,42,43,54).Investigations of microbial species present in gas industry pipelines have traditionally relied upon the use of samples obtained from pipelines to grow bacterial cultures in the laboratory (42). Laboratory growth media cannot accurately reflect the true conditions within pipelines, and microbiologists have recognized that the vast majority of microbial species cannot currently be grown in the laboratory (35, 61); thus, culture-dependent approaches underestimate the biocomplexity of microbial communities.…”

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confidence: 99%

Characterization of Microbial Communities in Gas Industry Pipelines

Zhu

Lubeck

Kilbane

2003

Appl Environ Microbiol

139

102

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Culture-independent techniques, denaturing gradient gel electrophoresis (DGGE) analysis, and random cloning of 16S rRNA gene sequences amplified from community DNA were used to determine the diversity of microbial communities in gas industry pipelines. Samples obtained from natural gas pipelines were used directly for DNA extraction, inoculated into sulfate-reducing bacterium medium, or used to inoculate a reactor that simulated a natural gas pipeline environment. The variable V2-V3 (average size, 384 bp) and V3-V6 (average size, 648 bp) regions of bacterial and archaeal 16S rRNA genes, respectively, were amplified from genomic DNA isolated from nine natural gas pipeline samples and analyzed. A total of 106 bacterial 16S rDNA sequences were derived from DGGE bands, and these formed three major clusters: beta and gamma subdivisions of Proteobacteria and gram-positive bacteria. The most frequently encountered bacterial species was Comamonas denitrificans, which was not previously reported to be associated with microbial communities found in gas pipelines or with microbially influenced corrosion. The 31 archaeal 16S rDNA sequences obtained in this study were all related to those of methanogens and phylogenetically fall into three clusters: order I, Methanobacteriales; order III, Methanomicrobiales; and order IV, Methanosarcinales. Further microbial ecology studies are needed to better understand the relationship among bacterial and archaeal groups and the involvement of these groups in the process of microbially influenced corrosion in order to develop improved ways of monitoring and controlling microbially influenced corrosion.Corrosion is a leading cause of pipe failure and is a main component of the operating and maintenance costs of gas industry pipelines (3,10,18,23,30,31,(42)(43)(44)54). Quantifying the cost of corrosion generally, and more specifically the cost associated with microbial corrosion, in the gas industry is not easily done and is controversial. Pipeline corrosion was estimated in 1996 to cost the gas industry about $840 million/year (10), and in 2001 it was estimated that the annual cost of all forms of corrosion to the oil and gas industries was $13.4 billion, of which microbially influenced corrosion accounted for about $2 billion (31). While it is well recognized that chemical and microbial mechanisms both contribute to corrosion, it is uncertain what the relative contribution of microbial activity to overall pipe corrosion is. It has been estimated that 40% of all internal pipeline corrosion in the gas industry can be attributed to microbial corrosion (23, 44), but data are needed to confirm or revise this estimate. Basic research to increase our understanding of the microbial species involved in microbial corrosion and their interactions with metal surfaces and with other microorganisms will be the basis for the development of new approaches for the detection, monitoring, and control of microbial corrosion. A thorough knowledge of the causes of microbially influenced corrosion and an effici...

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Characterization of Microbial Communities in Gas Industry Pipelines

Zhu

Lubeck

Kilbane

2003

Appl Environ Microbiol

139

102

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“…The operating conditions that affect microbiologically induced corrosion (MIC) of materials include flow rate (velocity), temperature, pressure, pH, oxygen level, cleanliness of the system, and presence of water. MIC-related bacterial growth typically occurs in systems within specific temperature ranges, depending on the bacteria [12]. The range is often reported as being between 4 and 49 • C. More than 90% of MIC is seen as pitting-type corrosion.…”

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confidence: 99%

Wrought Aluminium Alloy Corrosion Propensity in Domestic Food Cooking Environment

2012

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The study on corrosion behaviour of wrought aluminium alloy in domestic food cooking conditions has been examined using the gravimetric approach. Flat cold rolled and annealed sheets were subjected to solutions of Capsicum annuum, L. esculentum, Allium cepa, and their blend under three conditions, namely, heating and cooling in still air, heating and cooling in refrigerator, and leaving some in open still atmosphere. Results show that corrosion occurred within the test period (288 hours) in the test environments. There was severe degradation within the first 70 hours of test when coupons were heated and cooled while unheated coupon showed low corrosion propensity. Microstructural analysis show the presence of corrosion pits on coupon surface with second phase particles sandwiched in α-aluminium matrix. Immersed coupon in the blend media show higher number of pits on the surface. Rapid corrosion of wrought aluminium alloy in Capsicum annuum, L. esculentum and Allium cepa media is attributed to the presence of corrosion aggressive elements such as allicin, diallyl-disulphide, and allyl-propyl disulphide present in the corrosion media.

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“…Essa alteração na superfície permite que novas reações aconteçam, ou que a cinética de reações conhecidas seja alterada, acelerando o desgaste do material. A formação de biofilme na superfície do metal é uma característica básica do processo de biocorrosão que freqüentemente não é considerada [25][26][27][28]. Por outro lado, tem-se que os microorganismos, principalmente, as bactérias se encontram em qualquer meio.…”

Section: Introductionunclassified

“…Normalmente, os estudos da biocorrosão se baseiam em testes microbiológicos, sendo poucas as referências a métodos alternativos [3,5,26,28,32]. O estudo de corrosão de materiais metálicos é classificado como uma área cientificamente fora de moda, entretanto, é um assunto complexo e interdisciplinar, principalmente no que concerne à ação associada de microorganismos, tendo relevância não só pela possibilidade de redução de perdas econômicas, mas também pela possibilidade de biorremediação de áreas contaminadas por metais pesados [6].…”

Section: Introductionunclassified

Corrosão do aço carbono em meio sulfato na presença da bactéria Salmonella anatum

Silva¹,

Filho²

2008

Matéria (Rio J.)

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A presença de microorganismos em meios aquosos pode alterar significativamente a interface metal/meio, ou reagir diretamente com a superfície do metal. Assim, colaborando para a deterioração química do material metálico. Este trabalho tem como objetivo avaliar a corrosão do aço em meio sulfato na presença da bactéria Salmonella anatum. Para tal feito, foram conduzidos testes de imersão de amostras de aço carbono no meio sulfato, bem como, realizadas análises das amostras por microscopia eletrônica de varredura e espectroscopia de energia dispersiva por raios-X. Também, foram efetuadas medidas de pH do meio. Foi verificada a perda de massa (em termos de concentração total de íons Fe) da amostra para o tempo de imersão. Por outro lado, foi observada a acidificação do meio, variando o pH de 7,3 (no início) para 5,0 (após 21 dias de imersão). As micrografias da superfície do aço evidenciam a extensa formação de biofilme, isto é, observa-se o crescimento de camada de depósito biológico uniforme, porém, não-homogêneo. Sugerese que ocorre a formação de óxidos de ferro e fosfatos inorgânicos sobre a superfície do aço-carbono.Palavras chaves: aço-carbono, corrosão, Salmonella.Carbon steel corrosion into sulphate medium in the presence of bacterium Salmonella anatum ABSTRACTMicroorganisms into aquatic media may alter significantly the metal/media interface, that is, react directly to metal surface. The aim of this work was evaluate the carbon-steel corrosion into sulfate media in the presence of bacterium Salmonella anatum. For this purpose, immersion assay with mass loss (in terms of total Fe ions concentration) was conducted; pH measurements of the electrolyte and superficial analysis by scanning electron microscopy (SEM) and energy dispersive by X-rays analysis (EDX) techniques were conducted. It was verified that the corrosion process rate is practically insignificant for seven day-immersion time. The pH medium has changed from 7.3 to 5.0 (after 21 days). The biologic deposit film has grown on the carbon-steel surface. It is suggested iron oxides and inorganic phosphates onto carbon steel surface are formed on carbon steel surface. Keywords: carbon-steel, corrosion, Salmonella INTRODUÇÃOA corrosão pode ser caracterizada como o ataque químico sobre uma superfície metálica por um meio agressivo a este, desta forma há o retorno do material à forma de óxido em uma reação espontânea para todos os metais, exceto os nobres. Vários são os fatores que afetam o processo de corrosão, entre eles, a temperatura, a umidade, os compostos presentes no meio e os microorganismos, sejam estes, bactérias, fungos e/ou vírus.De acordo com Videla [1], praticamente todos os microorganismos vistos até o momento se relacionam, em menor ou maior grau, aos processos de biocorrosão e bioacumulação (biofouling). Os microorganismos influenciam a corrosão de metais ao favorecer reações eletroquímicas que não são comuns em condições livres de microorganismos e pela alteração da superfície de contato com o meio, seja pela fixação dos próprios microorg...

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Understanding microbially influenced corrosion as biofilm-mediated changes in surface chemistry

Cited by 40 publications

References 14 publications

Characterization of Microbial Communities in Gas Industry Pipelines

Characterization of Microbial Communities in Gas Industry Pipelines

Wrought Aluminium Alloy Corrosion Propensity in Domestic Food Cooking Environment

Corrosão do aço carbono em meio sulfato na presença da bactéria Salmonella anatum

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