The Experts below are selected from a list of 312 Experts worldwide ranked by ideXlab platform
Arumugam Veera Ravi - One of the best experts on this subject based on the ideXlab platform.
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the control of microbially Induced Corrosion by methyl eugenol a dietary phytochemical with quorum sensing inhibitory potential
Bioelectrochemistry, 2019Co-Authors: Issac Abraham Sybiya Vasantha Packiavathy, Gnanasekaran Gnanaselvan, Subbiah Manoharan, John Bosco John Paul, Angusamy Annapoorani, Arunachalam Kannappan, Sundaram Maruthamuthu, Arumugam Veera RaviAbstract:Abstract The development of biofilms by microorganisms is conventionally attributed to microbially Induced Corrosion on stainless steel surfaces and leads to severe consequences in industrial and environmental settings. Since bacterial biofilm formation is regulated by the signal mediated quorum sensing (QS) system, targeting biofilms through QS inhibitors will possibly control biologically Induced Corrosion on the metal surface. In this study, biofilm formation on 316L stainless steel (SS 316L) immersed in a natural pond water system was effectively inhibited in the presence of the QS inhibitor methyl eugenol, as evidenced through epifluorescence microscopy, confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM) analyses. The exopolysaccharide (EPS) and protein extracted from the biofilm formed on the metal surface were found to be reduced by 64% and 60%, respectively, upon exposure to methyl eugenol. In addition, applied electrode potential (open circuit and cathodic) measurements indicated reduced oxygen reduction current at the metal surface that was exposed to methyl eugenol. This inhibitor also enhanced the polarization resistance (Rp) of the SS 316L as indicated by electrochemical impedance spectroscopic (EIS) study.
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The control of microbially Induced Corrosion by methyl eugenol – A dietary phytochemical with quorum sensing inhibitory potential
Bioelectrochemistry, 2019Co-Authors: Issac Abraham Sybiya Vasantha Packiavathy, Gnanasekaran Gnanaselvan, Subbiah Manoharan, John Bosco John Paul, Angusamy Annapoorani, Arunachalam Kannappan, Sundaram Maruthamuthu, Arumugam Veera RaviAbstract:Abstract The development of biofilms by microorganisms is conventionally attributed to microbially Induced Corrosion on stainless steel surfaces and leads to severe consequences in industrial and environmental settings. Since bacterial biofilm formation is regulated by the signal mediated quorum sensing (QS) system, targeting biofilms through QS inhibitors will possibly control biologically Induced Corrosion on the metal surface. In this study, biofilm formation on 316L stainless steel (SS 316L) immersed in a natural pond water system was effectively inhibited in the presence of the QS inhibitor methyl eugenol, as evidenced through epifluorescence microscopy, confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM) analyses. The exopolysaccharide (EPS) and protein extracted from the biofilm formed on the metal surface were found to be reduced by 64% and 60%, respectively, upon exposure to methyl eugenol. In addition, applied electrode potential (open circuit and cathodic) measurements indicated reduced oxygen reduction current at the metal surface that was exposed to methyl eugenol. This inhibitor also enhanced the polarization resistance (Rp) of the SS 316L as indicated by electrochemical impedance spectroscopic (EIS) study.
Marco Ormellese - One of the best experts on this subject based on the ideXlab platform.
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Use of a linear continuous reference electrode to monitor the chloride‐Induced Corrosion of steel in prestressed concrete
Materials and Corrosion-werkstoffe Und Korrosion, 2013Co-Authors: Marco Ormellese, Andrea Brenna, Luciano LazzariAbstract:Failures of pre-stressed steel caused by hydrogen embrittlement as a consequence of chloride-Induced Corrosion are well known in the civil engineering field. In 1995, a wire-type reference electrode was proposed to monitor pre-stressed tendons Corrosion potential, claiming that, once a pit occurs in any position on the steel, the potential measured by the linear reference electrode – regardless of its length – drops to values typical of active range, giving the evidence of pitting occurrence. From the practical point of view, the use of such an electrode is very appealing because of the simplicity, nevertheless, concerns on the true meaning of the potential reading arose both from theoretical point of view and because of lack of similar use in electrochemistry. Laboratory tests were performed on some linear reference electrodes simulating chloride-Induced Corrosion in concrete, in order to understand the meaning of the potential reading and the ability to detect the initiation of localised Corrosion.
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Organic substances as inhibitors for chloride-Induced Corrosion in reinforced concrete
Materials and Corrosion-werkstoffe Und Korrosion, 2010Co-Authors: Marco Ormellese, Fabio Maria Bolzoni, Luciano Lazzari, Andrea Brenna, Mariapia PedeferriAbstract:Corrosion inhibitors are used to prevent chloride-Induced Corrosion in reinforced concrete structures. Since performance of commercial organic inhibitors is only partially satisfactory, a 7-year long research has been carried out in order to set-up a new organic inhibitive mixture, able to prevent chlorides-Induced Corrosion. A first screening, by means of potentiodynamic polarisation test in alkaline synthetic pore solution, was performed on 80 organic compounds, mainly primary and tertiary amines, aminoalcohols, carboxylates compounds and aminoacids, in order to select the best inhibiting substances. The nine best inhibitive organic substances were selected for long-term tests: 2 amines (dimethylethanolamine and triethylentetramine), 4 aminoacids (aspartate, asparagine, glutamate and glutamine) and 3 carboxylates compounds (tartrate, benzoate and EDTA). Potentiostatic polarisation and free Corrosion tests in synthetic pore solution were performed, as well as tests in concrete exposed to accelerated chlorides penetration. Five years of tests allow estimating the efficiency of the substances in preventing chlorides-Induced Corrosion, in term of influence on chlorides penetration and on critical chlorides threshold.
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a study of organic substances as inhibitors for chloride Induced Corrosion in concrete
Corrosion Science, 2009Co-Authors: Marco Ormellese, Luciano Lazzari, Sara Goidanich, G Fumagalli, Andrea BrennaAbstract:Chloride-Induced Corrosion of carbon steel reinforcement is the most important cause of premature failure on reinforced concrete structures. Among available methods, Corrosion inhibitors offer a simple and cost effective prevention technique, primarily to prevent and stop chloride-Induced Corrosion. Nevertheless, performance of commercial inhibitors is only partially satisfactory. This paper deals with a basic study on the inhibitive action of organic substances toward chloride-Induced Corrosion on carbon steel rebar in alkaline environment. The effect of aminic and carboxylic groups was investigated through electrochemical potentiodynamic polarisation tests in simulating concrete pore solution in the presence of chlorides, to ascertain inhibitor effectiveness to increase pitting potential. Results are discussed taking into account the most likely mechanism of inhibition, in relation to the functional group of tested organic compounds.
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Corrosion inhibitors for chlorides Induced Corrosion in reinforced concrete structures
Cement and Concrete Research, 2006Co-Authors: Marco Ormellese, Fabio Maria Bolzoni, M Berra, Tommaso PastoreAbstract:Abstract Reinforcements Corrosion is the most important cause of premature failure on reinforced concrete structures. Phenomena promoting Corrosion are the ingress of chlorides and the reaction of atmospheric CO 2 with cement paste. Aim of this paper is the investigation on the effectiveness of three organic commercial inhibitors in preventing carbon steel chlorides Induced Corrosion in concrete, since there is not yet a clear knowledge on the real effectiveness of these products. Inhibitors were added to the concrete mixture in dosage suggested by the manufacturers. Chlorides were added in the concrete mixture or penetrated from outside by “ponding” cycles with a 3.5% sodium chloride solution. The effectiveness of the inhibitors has been evaluated by long-term rebar Corrosion monitoring in reinforced concrete and by rebar visual inspection after three years tests. Also solution tests were performed in order to verify the effectiveness of inhibition. Results give information about Corrosion prevention ability of analysed commercial inhibitors.
Issac Abraham Sybiya Vasantha Packiavathy - One of the best experts on this subject based on the ideXlab platform.
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the control of microbially Induced Corrosion by methyl eugenol a dietary phytochemical with quorum sensing inhibitory potential
Bioelectrochemistry, 2019Co-Authors: Issac Abraham Sybiya Vasantha Packiavathy, Gnanasekaran Gnanaselvan, Subbiah Manoharan, John Bosco John Paul, Angusamy Annapoorani, Arunachalam Kannappan, Sundaram Maruthamuthu, Arumugam Veera RaviAbstract:Abstract The development of biofilms by microorganisms is conventionally attributed to microbially Induced Corrosion on stainless steel surfaces and leads to severe consequences in industrial and environmental settings. Since bacterial biofilm formation is regulated by the signal mediated quorum sensing (QS) system, targeting biofilms through QS inhibitors will possibly control biologically Induced Corrosion on the metal surface. In this study, biofilm formation on 316L stainless steel (SS 316L) immersed in a natural pond water system was effectively inhibited in the presence of the QS inhibitor methyl eugenol, as evidenced through epifluorescence microscopy, confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM) analyses. The exopolysaccharide (EPS) and protein extracted from the biofilm formed on the metal surface were found to be reduced by 64% and 60%, respectively, upon exposure to methyl eugenol. In addition, applied electrode potential (open circuit and cathodic) measurements indicated reduced oxygen reduction current at the metal surface that was exposed to methyl eugenol. This inhibitor also enhanced the polarization resistance (Rp) of the SS 316L as indicated by electrochemical impedance spectroscopic (EIS) study.
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The control of microbially Induced Corrosion by methyl eugenol – A dietary phytochemical with quorum sensing inhibitory potential
Bioelectrochemistry, 2019Co-Authors: Issac Abraham Sybiya Vasantha Packiavathy, Gnanasekaran Gnanaselvan, Subbiah Manoharan, John Bosco John Paul, Angusamy Annapoorani, Arunachalam Kannappan, Sundaram Maruthamuthu, Arumugam Veera RaviAbstract:Abstract The development of biofilms by microorganisms is conventionally attributed to microbially Induced Corrosion on stainless steel surfaces and leads to severe consequences in industrial and environmental settings. Since bacterial biofilm formation is regulated by the signal mediated quorum sensing (QS) system, targeting biofilms through QS inhibitors will possibly control biologically Induced Corrosion on the metal surface. In this study, biofilm formation on 316L stainless steel (SS 316L) immersed in a natural pond water system was effectively inhibited in the presence of the QS inhibitor methyl eugenol, as evidenced through epifluorescence microscopy, confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM) analyses. The exopolysaccharide (EPS) and protein extracted from the biofilm formed on the metal surface were found to be reduced by 64% and 60%, respectively, upon exposure to methyl eugenol. In addition, applied electrode potential (open circuit and cathodic) measurements indicated reduced oxygen reduction current at the metal surface that was exposed to methyl eugenol. This inhibitor also enhanced the polarization resistance (Rp) of the SS 316L as indicated by electrochemical impedance spectroscopic (EIS) study.
Tommaso Pastore - One of the best experts on this subject based on the ideXlab platform.
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Corrosion inhibitors for chlorides Induced Corrosion in reinforced concrete structures
Cement and Concrete Research, 2006Co-Authors: Marco Ormellese, Fabio Maria Bolzoni, M Berra, Tommaso PastoreAbstract:Abstract Reinforcements Corrosion is the most important cause of premature failure on reinforced concrete structures. Phenomena promoting Corrosion are the ingress of chlorides and the reaction of atmospheric CO 2 with cement paste. Aim of this paper is the investigation on the effectiveness of three organic commercial inhibitors in preventing carbon steel chlorides Induced Corrosion in concrete, since there is not yet a clear knowledge on the real effectiveness of these products. Inhibitors were added to the concrete mixture in dosage suggested by the manufacturers. Chlorides were added in the concrete mixture or penetrated from outside by “ponding” cycles with a 3.5% sodium chloride solution. The effectiveness of the inhibitors has been evaluated by long-term rebar Corrosion monitoring in reinforced concrete and by rebar visual inspection after three years tests. Also solution tests were performed in order to verify the effectiveness of inhibition. Results give information about Corrosion prevention ability of analysed commercial inhibitors.
Subbiah Manoharan - One of the best experts on this subject based on the ideXlab platform.
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the control of microbially Induced Corrosion by methyl eugenol a dietary phytochemical with quorum sensing inhibitory potential
Bioelectrochemistry, 2019Co-Authors: Issac Abraham Sybiya Vasantha Packiavathy, Gnanasekaran Gnanaselvan, Subbiah Manoharan, John Bosco John Paul, Angusamy Annapoorani, Arunachalam Kannappan, Sundaram Maruthamuthu, Arumugam Veera RaviAbstract:Abstract The development of biofilms by microorganisms is conventionally attributed to microbially Induced Corrosion on stainless steel surfaces and leads to severe consequences in industrial and environmental settings. Since bacterial biofilm formation is regulated by the signal mediated quorum sensing (QS) system, targeting biofilms through QS inhibitors will possibly control biologically Induced Corrosion on the metal surface. In this study, biofilm formation on 316L stainless steel (SS 316L) immersed in a natural pond water system was effectively inhibited in the presence of the QS inhibitor methyl eugenol, as evidenced through epifluorescence microscopy, confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM) analyses. The exopolysaccharide (EPS) and protein extracted from the biofilm formed on the metal surface were found to be reduced by 64% and 60%, respectively, upon exposure to methyl eugenol. In addition, applied electrode potential (open circuit and cathodic) measurements indicated reduced oxygen reduction current at the metal surface that was exposed to methyl eugenol. This inhibitor also enhanced the polarization resistance (Rp) of the SS 316L as indicated by electrochemical impedance spectroscopic (EIS) study.
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The control of microbially Induced Corrosion by methyl eugenol – A dietary phytochemical with quorum sensing inhibitory potential
Bioelectrochemistry, 2019Co-Authors: Issac Abraham Sybiya Vasantha Packiavathy, Gnanasekaran Gnanaselvan, Subbiah Manoharan, John Bosco John Paul, Angusamy Annapoorani, Arunachalam Kannappan, Sundaram Maruthamuthu, Arumugam Veera RaviAbstract:Abstract The development of biofilms by microorganisms is conventionally attributed to microbially Induced Corrosion on stainless steel surfaces and leads to severe consequences in industrial and environmental settings. Since bacterial biofilm formation is regulated by the signal mediated quorum sensing (QS) system, targeting biofilms through QS inhibitors will possibly control biologically Induced Corrosion on the metal surface. In this study, biofilm formation on 316L stainless steel (SS 316L) immersed in a natural pond water system was effectively inhibited in the presence of the QS inhibitor methyl eugenol, as evidenced through epifluorescence microscopy, confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM) analyses. The exopolysaccharide (EPS) and protein extracted from the biofilm formed on the metal surface were found to be reduced by 64% and 60%, respectively, upon exposure to methyl eugenol. In addition, applied electrode potential (open circuit and cathodic) measurements indicated reduced oxygen reduction current at the metal surface that was exposed to methyl eugenol. This inhibitor also enhanced the polarization resistance (Rp) of the SS 316L as indicated by electrochemical impedance spectroscopic (EIS) study.