Biocorrosion
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. In vitro Bioactivity, Bio-Corrosion Resistance and Antibacterial Property of Laser Cladded HA Coatings with Different Content of ZnO on Ti-6Al-4V Substrate
HA/ZnO coatings with varying content of ZnO were fabricated on Ti-6Al-4V substrate to enhance its bioactivity and antibacterial ability. The main phases are identified as CaTiO3, Ca3(PO4)2, ZnTiO3 and CaO. The coatings with higher ZnO content presented smaller grain size, resulting in a higher surface free energy and better wettability. Consequently, the min
Mat. Res.. Publicado em: 05/09/2019
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2. Microbiologically-Influenced Corrosion of 1020 Carbon Steel in Artificial Seawater Using Garlic Oil as Natural Biocide
This work aims evaluate the use of biocides in the microbiologically-influenced corrosion (MIC) of AISI 1020 carbon steel by sulfate-reducing bacteria (SRB) in artificial seawater. A natural biocide (garlic oil) and a commercial biocide (glutaraldehyde) were used to control the corrosion caused by these bacteria in artificial seawater. Microbial growth on th
Mat. Res.. Publicado em: 30/05/2019
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3. Biocorrosion on Surface of ASTM A283 Carbon Steel, Exposed in Diesel S10 and Tap Water
This paper sets out to evaluate the corrosion and biocorrosion of carbon steel ASTM A283 exposed to a Diesel S10 oil/tap water system under static conditions for 90 days. The following analyzes were performed: physico-chemical in tap water, sulfur content in Diesel S10 and quantification of sessile microorganisms in the biofilm formed on the metal. To monito
Mat. Res.. Publicado em: 22/01/2018
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4. Streptomyces lunalinharesii 235 prevents the formation of a sulfate-reducing bacterial biofilm
ABSTRACT Streptomyces lunalinharesii strain 235 produces an antimicrobial substance that is active against sulfate reducing bacteria, the major bacterial group responsible for biofilm formation and biocorrosion in petroleum reservoirs. The use of this antimicrobial substance for sulfate reducing bacteria control is therefore a promising alternative to chemic
Braz. J. Microbiol.. Publicado em: 2016-09
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5. Occurrence of sulphate reducing bacteria (SRB) associated with biocorrosion on metallic surfaces in a hydroelectric power station in Ibirama (SC) - Brazil
The aim of this study was evaluate, two methods for the detection and identification of sulphate reducing bacteria (SRB): ML medium and PCR with specific primers for SRB groups. SRB were detected through the selective medium only on carbon steel, which showed corrosion. Employing specific PCR primer, SBR were detected from all the metallic components assayed
Braz. arch. biol. technol.. Publicado em: 2013-10
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6. Avaliação de produtos naturais no controle de biofilmes formados em sistema dinâmico
Os biofilmes são formas de associação microbiana responsáveis por gerar, acelerar e/ou induzir o processo de corrosão. Os danos gerados na indústria de petróleo por esse tipo de corrosão são significativos, representando grandes investimentos para seu controle. O objetivo desse trabalho foi avaliar em testes tipo antibiograma os efeitos dos extratos
Publicado em: 2009
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7. Avaliação de ensaios simulativos de corrosão e biocorrosão em sistemas estático e dinâmico de revestimentos aplicados em aço carbono
The global cost caused by the corrosion represents a high economical loss. Several are the attempts of to retard the corrosion process, standing out the use of metallic and organic coatings. In this work, the anticorrosive properties coatings applied on carbon steel used in the industrial areas as alternatives of anticorrosive protection were investigated, b
Publicado em: 2008
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8. Hydrogenase activity in aged, nonviable Desulfovibrio vulgaris cultures and its significance in anaerobic biocorrosion.
Batch cultures of Desulfovibrio vulgaris stored at 32 degrees C for 10 months have been found to retain 50% of the hydrogenase activity of a 1-day culture. The hydrogenase found in old cultures needs reducing conditions for its activation. Viable cell counts are negative after 6 months, showing that the hydrogenase activity does not depend on the presence of
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9. Effect of Hydrogenase and Mixed Sulfate-Reducing Bacterial Populations on the Corrosion of Steel
The importance of hydrogenase activity to corrosion of steel was assessed by using mixed populations of sulfate-reducing bacteria isolated from corroded and noncorroded oil pipelines. Biofilms which developed on the steel studs contained detectable numbers of sulfate-reducing bacteria (104 increasing to 107/0.5 cm2). However, the biofilm with active hydrogen