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Search results for: biocorrosion
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for: biocorrosion</h1> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">6</span> Investigation of Biocorrosion in Brass by Arthrobacter sulfureus in Neutral Medium</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Ramachandran%20Manivannan">Ramachandran Manivannan</a>, <a href="https://publications.waset.org/abstracts/search?q=B.%20Sakthi%20Swaroop"> B. Sakthi Swaroop</a>, <a href="https://publications.waset.org/abstracts/search?q=Selvam%20Noyel%20Victoria"> Selvam Noyel Victoria</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Microbial corrosion of brass gauze by the aerobic film forming bacteria Arthrobacter sulfurous in neutral media was investigated using gravimetric studies. Maximum weight loss of 166.98 mg was observed for a period of 28 days of exposure to the bacterial medium as against the weight loss of 13.69 mg for control. The optical density studies for the bacterial culture was found to show attainment of stationary phase in 48 h. Scanning electron microscopy analysis of the samples shows the presence of pitting corrosion. The energy dispersive X-ray analysis of the samples showed increased oxygen and phosphorus content in the sample due to bacterial activity. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=Arthrobacter%20sulfureus" title="Arthrobacter sulfureus">Arthrobacter sulfureus</a>, <a href="https://publications.waset.org/abstracts/search?q=biocorrosion" title=" biocorrosion"> biocorrosion</a>, <a href="https://publications.waset.org/abstracts/search?q=brass" title=" brass"> brass</a>, <a href="https://publications.waset.org/abstracts/search?q=neutral%20medium" title=" neutral medium"> neutral medium</a> </p> <a href="https://publications.waset.org/abstracts/92760/investigation-of-biocorrosion-in-brass-by-arthrobacter-sulfureus-in-neutral-medium" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/92760.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">172</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">5</span> Study and Analyze of Metallic Glasses for Biomedical Applications: From Soft to Bone Tissue Engineering</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20Monfared">A. Monfared</a>, <a href="https://publications.waset.org/abstracts/search?q=S.%20Faghihi"> S. Faghihi</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Metallic glasses (MGs) are newcomers in the field of metals that show great potential for soft and bone tissue engineering due to the amorphous structure that endows unique properties. Up to now, various MGs based on Ti, Zr, Mg, Zn, Fe, Ca, and Sr in the form of a ribbon, bulk, thin-film, and powder have been investigated for biomedical purposes. This article reviews the compositions and biomedical properties of MGs as well as analyzes results in order to guide new approaches and future development of MGs. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=metallic%20glasses" title="metallic glasses">metallic glasses</a>, <a href="https://publications.waset.org/abstracts/search?q=biomaterials" title=" biomaterials"> biomaterials</a>, <a href="https://publications.waset.org/abstracts/search?q=biocompatibility" title=" biocompatibility"> biocompatibility</a>, <a href="https://publications.waset.org/abstracts/search?q=biocorrosion" title=" biocorrosion"> biocorrosion</a> </p> <a href="https://publications.waset.org/abstracts/142754/study-and-analyze-of-metallic-glasses-for-biomedical-applications-from-soft-to-bone-tissue-engineering" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/142754.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">214</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">4</span> Analysis of Sulphur-Oxidizing Bacteria Attack on Concrete Based on Waste Materials </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=A.%20E%C5%A1tokov%C3%A1">A. Eštoková</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Koval%C4%8D%C3%ADkov%C3%A1"> M. Kovalčíková</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Lupt%C3%A1kov%C3%A1"> A. Luptáková</a>, <a href="https://publications.waset.org/abstracts/search?q=A.%20Si%C4%8D%C3%A1kov%C3%A1"> A. Sičáková</a>, <a href="https://publications.waset.org/abstracts/search?q=M.%20Ondov%C3%A1"> M. Ondová</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Concrete durability as an important engineering property of concrete, determining the service life of concrete structures very significantly, can be threatened and even lost due to the interactions of concrete with external environment. Bio-corrosion process caused by presence and activities of microorganisms producing sulphuric acid is a special type of sulphate deterioration of concrete materials. The effects of sulphur-oxidizing bacteria Acidithiobacillus thiooxidans on various concrete samples, based on silica fume and zeolite, were investigated in laboratory during 180 days. A laboratory study was conducted to compare the performance of concrete samples in terms of the concrete deterioration influenced by the leaching of calcium and silicon compounds from the cement matrix. The changes in the elemental concentrations of calcium and silicon in both solid samples and liquid leachates were measured by using X – ray fluorescence method. Experimental studies confirmed the silica fume based concrete samples were found out to have the best performance in terms of both silicon and calcium ions leaching. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=biocorrosion" title="biocorrosion">biocorrosion</a>, <a href="https://publications.waset.org/abstracts/search?q=concrete" title=" concrete"> concrete</a>, <a href="https://publications.waset.org/abstracts/search?q=leaching" title=" leaching"> leaching</a>, <a href="https://publications.waset.org/abstracts/search?q=bacteria" title=" bacteria"> bacteria</a> </p> <a href="https://publications.waset.org/abstracts/8495/analysis-of-sulphur-oxidizing-bacteria-attack-on-concrete-based-on-waste-materials" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/8495.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">451</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">3</span> Graphene Reinforced Magnesium Metal Matrix Composites for Biomedical Applications </h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Khurram%20%20Munir">Khurram Munir</a>, <a href="https://publications.waset.org/abstracts/search?q=Cuie%20%20Wen"> Cuie Wen</a>, <a href="https://publications.waset.org/abstracts/search?q=Yuncang%20%20Li"> Yuncang Li</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Magnesium (Mg) metal matrix composites (MMCs) reinforced with graphene nanoplatelets (GNPs) have been developed by powder metallurgy (PM). In this study, GNPs with different concentrations (0.1-0.3 wt.%) were dispersed into Mg powders by high-energy ball-milling processes. The microstructure and resultant mechanical properties of the fabricated nanocomposites were characterized using transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), Raman spectroscopy (RS), compression and nano-wear tests. The corrosion resistance of the fabricated composites was evaluated by electrochemical tests and hydrogen evolution measurements. Finally, the biological response of Mg-GNPs composites was assessed using osteoblast-like SaOS2 cells. The results indicate that GNPs are excellent candidates as reinforcements in Mg matrices for the manufacture of biodegradable Mg-based composite implants. GNP addition improved the mechanical properties of Mg via synergetic strengthening modes. Moreover, retaining the structural integrity of GNPs during PM processing improved the ductility, compressive strength, and corrosion resistance of the Mg-GNP composites as compared to monolithic Mg. Cytotoxicity assessments did not reveal any significant toxicity with the addition of GNPs to Mg matrices. This study demonstrates that Mg-xGNPs with x < 0.3 wt.%, may constitute novel biodegradable implant materials for load-bearing applications. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=magnesium-graphene%20composites" title="magnesium-graphene composites">magnesium-graphene composites</a>, <a href="https://publications.waset.org/abstracts/search?q=strengthening%20mechanisms" title=" strengthening mechanisms"> strengthening mechanisms</a>, <a href="https://publications.waset.org/abstracts/search?q=In%20vitro%20cytotoxicity" title=" In vitro cytotoxicity"> In vitro cytotoxicity</a>, <a href="https://publications.waset.org/abstracts/search?q=biocorrosion" title=" biocorrosion"> biocorrosion</a> </p> <a href="https://publications.waset.org/abstracts/121858/graphene-reinforced-magnesium-metal-matrix-composites-for-biomedical-applications" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/121858.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">158</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">2</span> Quorum-Sensing Driven Inhibitors for Mitigating Microbial Influenced Corrosion</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Asma%20Lamin">Asma Lamin</a>, <a href="https://publications.waset.org/abstracts/search?q=Anna%20H.%20Kaksonen"> Anna H. Kaksonen</a>, <a href="https://publications.waset.org/abstracts/search?q=Ivan%20Cole"> Ivan Cole</a>, <a href="https://publications.waset.org/abstracts/search?q=Paul%20White"> Paul White</a>, <a href="https://publications.waset.org/abstracts/search?q=Xiao-Bo%20Chen"> Xiao-Bo Chen</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Microbiologically influenced corrosion (MIC) is a process in which microorganisms initiate, facilitate, or accelerate the electrochemical corrosion reactions of metallic components. Several reports documented that MIC accounts for about 20 to 40 % of the total cost of corrosion. Biofilm formation due to the presence of microorganisms on the surface of metal components is known to play a vital role in MIC, which can lead to severe consequences in various environmental and industrial settings. Quorum sensing (QS) system plays a major role in regulating biofilm formation and control the expression of some microbial enzymes. QS is a communication mechanism between microorganisms that involves the regulation of gene expression as a response to the microbial cell density within an environment. This process is employed by both Gram-positive and Gram-negative bacteria to regulate different physiological functions. QS involves production, detection, and responses to signalling chemicals, known as auto-inducers. QS controls specific processes important for the microbial community, such as biofilm formation, virulence factor expression, production of secondary metabolites and stress adaptation mechanisms. The use of QS inhibitors (QSIs) has been proposed as a possible solution to biofilm related challenges in many different applications. Although QSIs have demonstrated some strength in tackling biofouling, QSI-based strategies to control microbially influenced corrosion have not been thoroughly investigated. As such, our research aims to target the QS mechanisms as a strategy for mitigating MIC on metal surfaces in engineered systems. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=quorum%20sensing" title="quorum sensing">quorum sensing</a>, <a href="https://publications.waset.org/abstracts/search?q=quorum%20quenching" title=" quorum quenching"> quorum quenching</a>, <a href="https://publications.waset.org/abstracts/search?q=biofilm" title=" biofilm"> biofilm</a>, <a href="https://publications.waset.org/abstracts/search?q=biocorrosion" title=" biocorrosion"> biocorrosion</a> </p> <a href="https://publications.waset.org/abstracts/155790/quorum-sensing-driven-inhibitors-for-mitigating-microbial-influenced-corrosion" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/155790.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">90</span> </span> </div> </div> <div class="card paper-listing mb-3 mt-3"> <h5 class="card-header" style="font-size:.9rem"><span class="badge badge-info">1</span> Inhouse Inhibitor for Mitigating Corrosion in the Algerian Oil and Gas Industry</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Hadjer%20Didouh">Hadjer Didouh</a>, <a href="https://publications.waset.org/abstracts/search?q=Mohamed%20Hadj%20Meliani"> Mohamed Hadj Meliani</a>, <a href="https://publications.waset.org/abstracts/search?q=Izzeddine%20Sameut%20Bouhaik"> Izzeddine Sameut Bouhaik</a> </p> <p class="card-text"><strong>Abstract:</strong></p> As global demand for natural gas intensifies, Algeria is increasing its production to meet this rising need, placing significant strain on the nation's extensive pipeline infrastructure. Sonatrach, Algeria's national oil and gas company, faces persistent challenges from metal corrosion, particularly microbiologically influenced corrosion (MIC), leading to substantial economic losses. This study investigates the corrosion-inhibiting properties of Calotropis procera extracts, known as karanka, as a sustainable alternative to conventional inhibitors, which often pose environmental risks. The Calotropis procera extracts were evaluated for their efficacy on carbon steel API 5L X52 through electrochemical techniques, including potentiodynamic polarization and electrochemical impedance spectroscopy (EIS), under simulated operational conditions at varying concentrations, particularly at 10%, and elevated temperatures up to 60°C. The results demonstrated remarkable inhibition efficiency, achieving 96.73% at 60°C, attributed to the formation of a stable protective film on the metal surface that suppressed anodic and cathodic corrosion reactions. Scanning electron microscopy (SEM) confirmed the stability and adherence of these protective films, while EIS analysis indicated a significant increase in charge transfer resistance, highlighting the extract's effectiveness in enhancing corrosion resistance. The abundant availability of Calotropis procera in Algeria and its low-cost extraction processes present a promising opportunity for sustainable biocorrosion management strategies in the oil and gas industry, reinforcing the potential of plant-based extracts as viable alternatives to synthetic inhibitors for environmentally friendly corrosion control. <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=corrosion%20inhibition" title="corrosion inhibition">corrosion inhibition</a>, <a href="https://publications.waset.org/abstracts/search?q=calotropis%20procera" title=" calotropis procera"> calotropis procera</a>, <a href="https://publications.waset.org/abstracts/search?q=microbiologically%20influenced%20corrosion" title=" microbiologically influenced corrosion"> microbiologically influenced corrosion</a>, <a href="https://publications.waset.org/abstracts/search?q=eco-friendly%20inhibitor" title=" eco-friendly inhibitor"> eco-friendly inhibitor</a> </p> <a href="https://publications.waset.org/abstracts/191069/inhouse-inhibitor-for-mitigating-corrosion-in-the-algerian-oil-and-gas-industry" class="btn btn-primary btn-sm">Procedia</a> <a href="https://publications.waset.org/abstracts/191069.pdf" target="_blank" class="btn btn-primary btn-sm">PDF</a> <span class="bg-info text-light px-1 py-1 float-right rounded"> Downloads <span class="badge badge-light">26</span> </span> </div> </div> </div> </main> <footer> <div id="infolinks" class="pt-3 pb-2"> <div class="container"> <div style="background-color:#f5f5f5;" class="p-3"> <div class="row"> <div class="col-md-2"> <ul class="list-unstyled"> About <li><a href="https://waset.org/page/support">About Us</a></li> <li><a href="https://waset.org/page/support#legal-information">Legal</a></li> <li><a target="_blank" rel="nofollow" href="https://publications.waset.org/static/files/WASET-16th-foundational-anniversary.pdf">WASET celebrates its 16th foundational anniversary</a></li> 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