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Showing 1 to 11 of 11 for “"iron surface"”.
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Physical adsorption of argon, krypton and nitrogen on iron and pyrex at very low pressures
… of argon, krypton, and nitrogen on Pyrex and iron was studied by a static technique in a constant volume system, in the temperature range 77.4 to 90.2°K and in the pressure range 10⁻⁹ to 10⁻⁴ torr. Analyses via Electron Spectroscopy for Chemical Analysis (ESCA), Scanning Electron Microscopy …
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Estudo do mecanismo de corrosão pelo CO2 em aço carbono via técnicas eletroquímicas em condições que incluem alta pressão e temperatura
… the non-action of CO2 directly on the free iron surface. The investigation of the influence of NaCl concentration on carbon steel corrosion suggests that the increase in the concentration of this salt leads to a decrease in steel corrosion.
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High-Temperature Corrosion of Aluminum Alloys: Oxide-Alloy Interactions and Sulfur Interface Chemistry
The spallation of aluminum, chromium, and iron oxide scales is a chronic problem that critically impacts technological applications like aerospace, power plant operation, catalysis, petrochemical industry, and the fabrication of composite materials. The presence of interfacial impurities, mainly …
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Removal of organic contaminants from aqueous systems
… For NB, this study focusses on removal via both iron reduction and adsorption, while removal of the other three compounds is focussed purely on adsorption. The results demonstrate NB degradation using iron powder produces AN, with the rate decreasing under basic conditions, due to corrosive …
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Geochemical Aspects of Waste Disposal
… chemical reactions of phenol to afford less environmentally problematic compounds was investigated. Attention was devoted to catalysts which may be supported on clays, such as montmorillonite and decompose phenol. Hence certain copper(II) complexes which could catalyse ring opening reactions of …
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The Influence of Water Chemistry on H2 Production and Uptake during Anaerobic Iron Corrosion
Iron corrosion is the most important economic and aesthetic problem facing utilities. In the water distribution system, problems caused by iron corrosion include "red water", scale buildup, and pipe failures. It is necessary to improve our mechanistic understanding of anaerobic iron corrosion in …
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Aqueous Silica in the Environment: Effects on Iron Hydroxide Surface Chemistry and Implications for Natural and Engineered Systems
… waters and exhibits a high affinity for the surfaces of iron oxides. Therefore, it is expected to play an important role in environmental systems. Experiments were conducted to investigate the fundamentals of silica sorption onto pre-formed ferric hydroxide at pH 5.0-9.5 and silica …
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Reaction Rates For The Dehalogenation Of Trichloroethylene Using Various Types Of Zero-valent Iron
… their toxicity and their persistence in the environment. Iron has been used extensively in the past decade as a subsurface reactive agent for the remediation of dense, nonaqueous-phase liquids (DNAPLs). Permeable reactive barrier walls (PRBW) have been installed at many sites around the country …
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Separating the Kinetic and Sorption Parameters of Mixed Chlorinated Solvents in Contact with Granular Iron
… an important concern for public health. Granular iron, the most common medium in permeable reactive barriers (PRBs), is very effective at removing organic chemicals, such as chlorinated solvents and nitroaromatic compounds, from groundwater. In an effort to improve barrier designs, studies have …
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A parametric investigation on the influence and inhibition performance on CO2 corrosion of carbon steel
… ions) combine together to form a precipitate on iron surface that are porous and non-protective. To prevent these occurrence, Mono-Ethylene glycol (MEG) is been utilized in the pipeline as an antifreeze and anti-corrosion agent. It has been observed that the MEG need to be separated from acetic …
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Density Functional Theory Study of Aromatic Adsorption on Iron Surfaces
… adsorption behaviour of aromatic molecules on iron surfaces using density functional theory (DFT) calculations. The adsorbates studied are benzene ($C_{6}H_{6}$), naphthalene ($C_{8}H_{10}$) and quinolinium ($C_{7}H_{10}N^{+}$) as well as a molecule composed of these fragments known to inhibit …