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Showing 1 to 17 of 17 for “"high temperature corrosion"”.
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Effect of Vanadium on High Temperature Corrosion of Alloy Steel
… 9 Cr alloys (Grade 91) are commonly used at high temperature processes in industries. However, their corrosion performance needs to be further evaluated in order to consider them a vital alternative for corrosion application. This research was focused on the performance of this material at …
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A Study of High Temperature Corrosion in an AFBC System
<p>The occurrence of furnace wall and superheater corrosion in fluidized bed combustor systems has caused some operational and economic concerns. It is generally accepted that chlorine and sulfur may play roles in this corrosion. In order to predict the performance of high chlorine or high sulfur …
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High-temperature corrosion study of alloys in molten MgCl₂-KCl eutectic salt
… properties. This research investigates the corrosion behavior and protection strategies of Haynes 230 (H230), Incoloy 800H (800H), and Stainless Steel 316 (SS316) in MgCl₂-KCl molten salt at high temperature. First of all, the corrosion rates of different alloys are determined by performing …
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High-Temperature Corrosion of Aluminum Alloys: Oxide-Alloy Interactions and Sulfur Interface Chemistry
… to accelerate spallation, thereby promoting the high-temperature corrosion of metals and alloys. The precise mechanism for sulfur-induced destruction of oxides, however, is ambiguous. The objective of the present research is to elucidate the microscopic mechanism for the high-temperature …
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High Temperature Corrosion Studies of Metallic Materials in High Temperature Gas-Cooled Nuclear Reactor Helium Environment
Made available in DSpace on 2017-07-06T18:55:04Z (GMT). No. of bitstreams: 3 Lee_Daniel_K_MS.pdf: 75457165 bytes, checksum: 1c352f8a0eaf27a3c60286c777a82659 (MD5) Lee_Daniel_K_MS_ABS.pdf: 628459 bytes, checksum: 9adc2363b16d312ea8d65075fd1b4b1f (MD5) license.txt: 4813 bytes, checksum: …
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High Temperature Corrosion of Single Crystal Sapphire and Zirconia in Coal Gasification and Commercial Glass Environments
To meet the requirements of precise temperature monitoring at high temperatures in extremely corrosive environments, such as in coal gasifiers, a new sensor technology has been developed. This optical, ultra high temperature measurement system utilizes single crystal sapphire as a sensing element. …
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High-temperature corrosion protection of gas turbine blades with micro-coatings and nano-coatings : simulation and experiments
Material degradation at high temperature is a serious problem in gas turbines in aircraft. In these systems, the expansion blades experience high temperatures ranging from 850 Celsius to in excess of 1000 Celsius. High temperature corrosion is very significant therefore in such systems and either …
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CMZP and Mg-doped Al2TiO5 Thin film Coatings for High Temperature Corrosion Protection of Si3N4 Heat Exchangers
… industrial heat exchangers. However, at elevated temperatures and in coal combustion atmospheres its lifetime is severely reduced by oxidation. To increase its corrosion resistance, the formation of a protective oxidation barrier layer was promoted by the deposition of oxide thin films. …
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Magnetic Field Sensing via Multi-Material Acoustic Sensing Optical Fibers with Magnetostrictive Cladding Inclusions
… fiber magnetic sensor. Magnetic sensing has high demand across different fields and often runs into challenges of extreme environments including high temperature, corrosion, and areas with poor accessibility. The robust and distributed nature of optical fiber sensors which can be cheaply …
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Surface degradation and creep of Inconel 617 and Haynes 230 at high temperatures
The high temperature gas-cooled reactor (HTGR) design has been selected for the Next Generation Nuclear Plant (NGNP) project. The helium coolant in the primary circuit has been found to contain low levels of impurities (e.g. CO, CO2, H2O, CH4, and H2) after steady-state operation. This can lead to …
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Processing and characterization of laser-synthesized overcoats for surface engineering
… to selectively improve the tribological and high temperature corrosion properties without affecting the bulk-properties of the substrate. The present investigation has been focused on developing such laser-synthesized cost-effective coatings. The major emphasis has been given to identify the …
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Investigation of carburization extent from the inner diameter (ID) of ethylene furnace tubes using non-destructive examination (NDE) applied on the outer diameter (OD)
… used for ethylene pyrolysis often suffer severe high-temperature corrosion since the tube surfaces are heated up to about 1,100 0C in contact with steam-hydrocarbon gas mixtures. Simultaneous carbon deposition on the tube surfaces (i.e. coking) can deteriorate the mechanical properties of the …
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Analysis and optimization of a new accident tolerant fuel called fuel-in-fibers
The 2011 Fukushima Daiichi accident highlighted the weakness of the current nuclear fuel and motivated R&D of accident tolerant fuels. Accident tolerant fuels (ATF) are fuels that can tolerate loss of active cooling in the core of light water reactors (LWRs) for a considerably longer period of time …
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Silicon Carbide - Nanostructured Ferritic Alloy Composites for Nuclear Applications
… have the potential to maintain the outstanding high temperature corrosion and irradiation resistance and enhance the mechanical integrity for nuclear cladding. However, the formation of detrimental silicide phases due to reaction between SiC and NFA remains a major challenge. By introducing a …
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Multiscale corrosion of zirconium carbide, carbon, and CF/ZRC under extreme environments
… materials often fail. In the context of high-temperature air environments, such as those seen in hypersonics, highly reactive gas species, such as oxygen, are a primary mechanism by which most protection system materials degrade during service. This ultimately leads to changes in …
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Radiation-induced microstructural and mechanical property modifications in advanced alloys
… can withstand harsh reactor environments such as high pressure, high temperature, corrosion, and most importantly, high dose fast neutron irradiation. Upon irradiation, the atoms in metals and alloys undergo successive displacements and point defects are created far exceeding the equilibrium …
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Change Of Metal Oxidation State At High Temperature, Impact Of Temperature And Reactive Gases
… of stainless metal alloys is critical to allow high quality steam to be produced in a very harsh environment. Alternatively, in catalysis, the use of metal doped heterogeneous catalysts are essential in achieving selectivity and conversion performance for chemical synthesis to emissions …