The Experts below are selected from a list of 165 Experts worldwide ranked by ideXlab platform
Guangling Song - One of the best experts on this subject based on the ideXlab platform.
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multifunctional inhibition based on layered double hydroxides to comprehensively Control Corrosion of carbon steel in concrete
Corrosion Science, 2017Co-Authors: Shigang Dong, Dajiang Zheng, Jingjing Wang, Xiaojuan Zhang, Ronggui Du, Guangling SongAbstract:Abstract A novel multifunctional inhibitor of MgAl-layered double hydroxides (LDHs) loaded with nitrite anions was synthesized via a calcination-rehydration in ambient atmosphere without inert gas protection. It was demonstrated that such LDHs loaded with inhibitor was able to efficiently Control the Corrosion of carbon steel in simulated carbonated concrete pore (SCCP) solution as well as in mortar. Based on the systematic measurements, a conceptual model was proposed to further understand the mechanism of multifunctional Corrosion protection of MgAl-LDHs-NO 2 − in steel reinforced concrete. Such unique multifunctional composite is markedly helpful to comprehensively Control Corrosion of steel in concrete.
Jim Luong - One of the best experts on this subject based on the ideXlab platform.
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ultra trace level analysis of morpholine cyclohexylamine and diethylaminoethanol in steam condensate by gas chromatography with multi mode inlet and flame ionization detection
Journal of Chromatography A, 2012Co-Authors: Jim Luong, Robert A Shellie, Hernan J Cortes, Ronda Gras, Taylor C HaywardAbstract:Abstract Steam condensate water treatment is a vital and integral part of the overall cooling water treatment process. Steam condensate often contains varying levels of carbon dioxide and oxygen which acts as an oxidizer. Carbon dioxide forms corrosive carbonic acid when dissolved in condensed steam. To neutralize the harmful effect of the carbonic acid, volatile amine compounds such as morpholine, cyclohexylamine, and diethylaminoethanol are often employed as part of a strategy to Control Corrosion in the water treatment process. Due to the high stability of these compounds in a water matrix, the indirect addition of such chemicals into the process via steam condensate often results in their presence throughout the process and even into the final product. It is therefore important to understand the impact of these chemicals and their fate within a chemical plant. The ability to analyze such compounds by gas chromatography has historically been difficult due to the lack of chromatographic system inertness at the trace level concentrations especially in an aqueous matrix. Here a highly sensitive, practical, and reliable gas chromatographic approach is described for the determination of morpholine, cyclohexylamine, and diethylaminoethanol in steam condensate at the part-per-billion (ppb) levels. The approach does not require any sample enrichment or derivatization. The technique employs a multi-mode inlet operating in pulsed splitless mode with programmed inlet temperature for sample introduction, an inert base-deactivated capillary column for solute separation and flame ionization detection. Chromatographic performance was further enhanced by the incorporation of 2-propanol as a co-solvent. Detection limits for morpholine, cyclohexylamine, diethylaminoethanol were established to be 100 ppb (v/v), with relative standard deviations (RSD) of less than 6% at the 95% confidence level (n = 20) and a percent recovery of 96% or higher for the solutes of interest over a range of 0.1–100 ppm (v/v). A complete analysis can be conducted in less than 10 min.
N Palaniswamy - One of the best experts on this subject based on the ideXlab platform.
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microbial Corrosion in petroleum product transporting pipelines
Industrial & Engineering Chemistry Research, 2011Co-Authors: S Maruthamuthu, Baskaran Dinesh Kumar, Shanmugavel Ramachandran, B Anandkumar, Seeni Palanichamy, M Chandrasekaran, Palani Subramanian, N PalaniswamyAbstract:Petroleum product pipelines in India contain large numbers of various types of microorganisms that either directly or indirectly enhance Corrosion. Field studies have been carried out by CSIR-CECRI to investigate the Corrosion problem in petroleum product transporting pipelines in South India. Although Unicor J inhibitor was added in the pipeline to Control Corrosion, Corrosion products were detected in the pipeline. The present study reveals that the degradation of the inhibitor enhances the proliferation of bacteria, which enhances the Corrosion. The selection of an inhibitor to Control Corrosion has also been done.
Taylor C Hayward - One of the best experts on this subject based on the ideXlab platform.
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ultra trace level analysis of morpholine cyclohexylamine and diethylaminoethanol in steam condensate by gas chromatography with multi mode inlet and flame ionization detection
Journal of Chromatography A, 2012Co-Authors: Jim Luong, Robert A Shellie, Hernan J Cortes, Ronda Gras, Taylor C HaywardAbstract:Abstract Steam condensate water treatment is a vital and integral part of the overall cooling water treatment process. Steam condensate often contains varying levels of carbon dioxide and oxygen which acts as an oxidizer. Carbon dioxide forms corrosive carbonic acid when dissolved in condensed steam. To neutralize the harmful effect of the carbonic acid, volatile amine compounds such as morpholine, cyclohexylamine, and diethylaminoethanol are often employed as part of a strategy to Control Corrosion in the water treatment process. Due to the high stability of these compounds in a water matrix, the indirect addition of such chemicals into the process via steam condensate often results in their presence throughout the process and even into the final product. It is therefore important to understand the impact of these chemicals and their fate within a chemical plant. The ability to analyze such compounds by gas chromatography has historically been difficult due to the lack of chromatographic system inertness at the trace level concentrations especially in an aqueous matrix. Here a highly sensitive, practical, and reliable gas chromatographic approach is described for the determination of morpholine, cyclohexylamine, and diethylaminoethanol in steam condensate at the part-per-billion (ppb) levels. The approach does not require any sample enrichment or derivatization. The technique employs a multi-mode inlet operating in pulsed splitless mode with programmed inlet temperature for sample introduction, an inert base-deactivated capillary column for solute separation and flame ionization detection. Chromatographic performance was further enhanced by the incorporation of 2-propanol as a co-solvent. Detection limits for morpholine, cyclohexylamine, diethylaminoethanol were established to be 100 ppb (v/v), with relative standard deviations (RSD) of less than 6% at the 95% confidence level (n = 20) and a percent recovery of 96% or higher for the solutes of interest over a range of 0.1–100 ppm (v/v). A complete analysis can be conducted in less than 10 min.
M G S Ferreira - One of the best experts on this subject based on the ideXlab platform.
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electrochemical behaviour of amino alcohol based inhibitors used to Control Corrosion of reinforcing steel
Electrochimica Acta, 2004Co-Authors: H E Jamil, A Shriri, R Boulif, C Bastos, M F Montemor, M G S FerreiraAbstract:Laboratory investigations were performed in order to compare the electrochemical behaviour of amino alcohol-based inhibitors currently used to prevent (preventive inhibitors) and to Control (curative inhibitor) Corrosion of steel in concrete, respectively. The investigation was performed in the presence of chloride ions, using extract solutions simulating the concrete interstitial electrolyte. Electrochemical measurements allowed to compare the protective efficiency of these inhibitors.