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 19 of 19 for “"corrosion mechanism"”.
-
The effects of thin polymeric surface films on fretting corrosion
… two metals, and if they can, what the protection mechanisms are. This research is a part of fretting corrosion studies currently funded by the Army Research Office. Four thermoplastic polymers were tested for their effectiveness. Two other independent variables were also tested: plate hardness and …
-
Real-Time Monitoring of Short-Term Steel Corrosion in Cement and Soil
The corrosion process is defined as an electrochemical reaction that causes the deterioration and loss of material which adversely affects the critical properties of a material such as its microstructure, mechanical properties, and physical appearance. Corrosion of steel is of particular interest …
-
CORROSION RESISTANCE PERFORMANCE INVESTIGATION OF MILD STEEL BAR COATED WITH MAGNESIUM PHOSPHATE CEMENT PASTE
<p>"In this research study, the anti-corrosion mechanism of reinforcement embedded in magnesium potassium phosphate cement (MKPC) is explored. In addition, one type of additives, metakaolin, and one type of retarder, boric acid, are employed in MKPC to modify its properties in order to further …
-
Electrical degradation mechanisms of RF power GaAs PHEMTs
… we have carried out a comprehensive study of the mechanisms of electrical degradation on a set of experimental RF power GaAs PHEMTs (non-commercial devices provided by our sponsor, Mitsubishi Electric). A wide variety of electrical stressing experiments employing different conditions (varying …
-
Understanding the mechanisms and parameters affecting the structural corrosion of sheet gauge 7xxx alloys
… strength through the precipitation hardening mechanism, which involves the formation of nanosized precipitates after a specific heat treatment sequence. However, one of the main roadblocks to the penetration of 7xxx alloys in structural applications like rockers and bumpers is concerns …
-
Localized Corrosion of Friction Stir Welded Magnesium AZ Alloys
… challenges associated with their inherently poor corrosion resistance properties, a problem that is accentuated when the alloys are welded. The work in this dissertation elucidated the mechanisms governing the corrosion behaviour of friction stir welded magnesium AZ alloys. The investigation …
-
Corrosion Behaviors of Coated Aluminum Alloys in Simulated Corrosive Environment
<p>This study investigated the corrosion of an aluminum alloy with and without coatings under simulated corrosive environments. Coatings were selected and applied from commercial materials and techniques, consisting of microceramic, epoxy primer, and topcoat. The experiments for coated specimens …
-
Enhancing Corrosion Resistance and Hardness Properties of High-Carbon Steel and Aluminium Bronze Alloy Through Novel Surface Modification Technique
… relatively low cost. With a mediocre level of corrosion resistance, the improvement is very important to extend its serviceability. Studied steels were analysed by using advanced characterisation techniques that led to in-depth investigation on its behaviour toward corrosion degradation in …
-
Influence of Bridge Deck Concrete Parameters on the Reinforcing Steel Corrosion
Chloride induced corrosion of steel in concrete is one of the major forms of deterioration mechanisms found in reinforced concrete bridges. Early age corrosion damage reduces the lifespan of the bridges, which results in heavy economic losses. Research has been conducted to identify economic …
-
Computational and adsorption investigation of some quinoxaline derivatives on selected metals in acidic media
… (MQ6CA) at 303 – 333 K. The corrosion inhibition characteristics including corrosion mechanism, corrosion inhibition efficiencies, and inhibitor-metal adsorption/desorption behavior were analyzed using gravimetric analysis, electrochemical impedance spectroscopy (EIS), and …
-
Effect of Installation Practices on Galvanic Corrosion in Service Lines, Low Flow Rate Sampling for Detecting Water-Lead Hazards, and Trace Metals on Drinking Water Pipeline Corrosion: Lessons in Unintended Consequences
Corrosion of drinking water distribution systems can cost water utilities and homeowners tens of billions of dollars each year in infrastructure damage, adversely impacting public health and causing water loss through leaks. Often, seemingly innocuous choices made by utilities, plumbers, and …
-
The effect of base stock and additive packages in an automotive oil on the friction and wear behaviour of overhead camshaft and finger follower systems
… by either a surface, sub-surface or stress - corrosion mechanism. Analysis of this type of failure is complicated by the difference in both chill depth and hardness and also the presence. of cracks within, samples prior to examination and testing. Standardisation of chilled white irons …
-
Corrosion of steel reinforcement in concrete. Corrosion of mild steel bars in concrete and its effect on steel-concrete bond strength.
This thesis reports on the research outcome of corrosion mechanism and corrosion rate of mild steel in different environments (saline, alkaline solutions and concrete media) using potentiodynamic polarization technique. The study also included the effect of corrosion on bond strength between …
-
Composition and microstructure of concrete mixtures subjected to biogenic acid corrosion and their role in corrosion prediction of concrete outfall sewers
… In principle, the biogenic H2SO4 concrete corrosion mechanism entails simultaneous destruction of the calcium hydroxide (CH) in the hydrated cement paste (HCP) and substituting a larger molecule of calcium sulphate into the concrete matrix thus causing pressure and spalling of the adjacent …
-
Reconsidering Lead Corrosion in Drinking Water: Product Testing, Direct Chloramine Attack and Galvanic Corrosion
… standards for brass, and 4) galvanically driven corrosion of lead bearing plumbing materials. The results were instrumental in uncovering and understanding a serious problem with lead contamination in Washington, D.C. A critical reading of the literature indicates that chloramines can accelerate …
-
Corrosion behavior and mechanism of metallic biomaterials produced by laser powder bed fusion
… rate in the manufacturing process. However, the corrosion resistance of some produced alloys has been proved to have inferior corrosion resistance in some harsh environments. Although the corrosion mechanism of the L-PBFproduced alloys has been studied gradually in recent, and the results are …
-
Thermodynamics and Kinetics of Carbon Dioxide Corrosion of Mild Steel at Elevated Temperatures
<p>CO<sub>2</sub> corrosion of mild steel in the oil and gas industry has been widely investigated. Nevertheless, research on high temperature CO<sub>2</sub> corrosion has been rarely conducted, and its mechanisms remain unclear. Therefore, it is important to complete an in-depth study of …
-
Beyond Water Regulation: Contamination of Private Wells, Citizen Science, and Corrosion of Household Plumbing
… of contaminants in private wells, 3) Leaks or corrosion within building plumbing, and 4) The role of citizen scientists in addressing water quality concerns. Private wells, which provide water for approximately 13% of the population (42.5 million people), are not subject to any federal …