Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 28 for “"High Temperature Corrosion"”.
-
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 …
-
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 …
-
High temperature corrosion in gas turbines : thermodynamic modelling and experimental results
… have raised a need for re-evaluation of the hot corrosion risk in industrial gas turbines. In this study, the risk of hot corrosion was determined using thermodynamic modelling for different impurity-contents and combustion parameters. Based on these results, the parameters for the corrosion …
-
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 …
-
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 …
-
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: …
-
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. …
-
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 …
-
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. …
-
Nickel- and iron-based HVOF thermal spray coatings for high temperature corrosion protection in biomass-fired power plant boilers
… in the energy sector, and increased demand for higher use of renewable energy sources and carbon-neutral fuels, such as biomass. There are over 1000 biomass boilers in Europe, and the number is increasing. These plants often face serious problems due to high temperature corrosion. Fouling and …
-
Development of protective coatings to improve high temperature corrosion resistance in chlorine containing environments based on an advanced corrosion risk assessment tool
… in these processes. A helpful tool can be corrosion prediction diagrams for designing optimized coating compositions. For this reason, a new concept for the assessment of high temperature corrosion resistance in oxygen-chlorine containing environments has been developed. This development …
-
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 …
-
Corrosion behaviour of ferritic stainless steels in H2/H2O environments
… technology for green hydrogen production with high efficiency and without a need for precious metal catalysts. SOEC operates at high temperatures which creates some challenges for the system, one being the high temperature corrosion of metal components in the electrolysis cell. During the …
-
Freisetzung anorganischer Spezies bei der thermochemischen Umwandlung biogener Festbrennstoffe
… or for the production of synthesis gas. High amounts of alkali, sulphur, and chlorine compounds in the flue gas can be problematic. These pollutants can cause slagging and fouling in the boiler, catalyst deactivation or high temperature corrosion of iron materials and nickel-base alloys. …
-
Untersuchungen zur Hochtemperaturchemie quecksilberfreier Metallhalogenid-Entladungslampen mit keramischem Brenner
… generation in a metal halide lamp. Further a corrosion attack on the burner vessel is observed due to chemical reactions of metal halides with the wall material Polycrystalline Alumina (PCA). In order to enhance the properties of light generation, it is aimed to describe the lamps in a …
-
Einbindung von Alkalimetallen bei der Druckkohlensstaubfeuerung
… gas turbine. A mayor problem of the PPCC is the high alkali content of the hot flue gases. The alkalis released during coal combustion can react with gaseous sulphur to alkali sulphates. These compounds cause high temperature corrosion of the Ni-base alloys of the turbine bladings. For this …
-
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 …
-
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 …
-
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 …
Page 1 of 2