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.
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Showing 1 to 20 of 37 for “"Corrosion Potential"”.
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Modeling water chemistry and electrochemical corrosion potential in boiling water reactors
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1997.
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Stress corrosion cracking and hydrogen embrittlement of thick section high strength low alloy steel
… experimental study was conducted to evaluate the corrosion performance of weldments of a high strength low alloy(HSLA) steel in a simulated seawater environment. This steel, designated HSLA80, was developed by the United States Navy for use in ship structural applications. Stress corrosion …
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The detection of crevice corrosion in titanium and its alloys through the use of potential monitoring
Conventional laboratory crevice corrosion testing requires approximately thirty days and is a simple go/no go test which does not indicate crevice incubation time and propagation. This study focuses on the effectiveness of potential monitoring to detect the onset of crevice corrosion and …
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OXIDE FILM FORMATION AND CONVERSION MECHANISM ON CARBON STEEL UNDER MILDLY BASIC CONDITIONS
Understanding the factors that can affect the corrosion of steel pipes or containers is an important concern for nuclear power plants. Corrosion involves metal oxidation and dissolution, and hence, its kinetics depends on the aqueous redox condition and the physical and chemical nature of surface …
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Effect of heat treatment on deformation and corrosion behavior of Type 422 stainless steel
… at elevated temperatures. The results of stress corrosion cracking tests performed by slow strain rate technique in the 90°C acidic solution revealed higher failure stress and reduced ductility to some extent for specimens tempered for longer time. The results of localized corrosion studies …
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Corrosion and electrochemical behavior of Indium and Indium-Bismuth alloys in hydrochloric acid
<p>"The corrosion of In-Bi alloys was studied using X-ray, scanning electron microscopy, atomic absorption spectroscopy, and cyclic voltammetry techniques.</p> <p>Calculated activation energy values indicated that the corrosion of In-Bi alloys was activation controlled. The effect of amine mixtures …
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The corrosion of CoCrMo alloys for biomedical applications
… hip resurfacing joints due to their high corrosion and wear performance. The present project was carried out to investigate the feasibility of taking electrochemical measurements from hip resurfacing joints whilst articulating in a hip simulator. In this study, the effect of ‘as-cast’ and …
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Modeling the Time-to Corrosion Cracking of the Cover Concrete in Chloride Contaminated Reinforced Concrete Structures
Significant factors on steel corrosion in chloride contaminated reinforced concrete and time-to-corrosion cracking were investigated in this study. Sixty specimens were designed with seven admixed chloride contents, three concrete cover depths, two reinforcing steel bar diameters, two exposure …
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Corrosion behaviour of welded joints within chloride and chloride/CO[2] environments.
… on welded carbon steel pipeline materials. Corrosion tests were performed within naturally chloride solution with and without CO[2] additions at ambient temperature. The pH within different environments, chloride solution alone and buffered chloride solution with CO[2] additions was measured …
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Characterization of the fatigue behavior of additively manufactured β-metastable titanium alloy Ti-5Al-5V-5Mo-3Cr on different length scales
… salt solution (HBSS). Changes in the free corrosion potential and the corrosion current are highly sensitive indicators for fatigue-induced damage on a rough surface, which was correlated to the microscopic examination, fracture surface features, and fatigue crack development. The gained …
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Electrochemical analysis of active species in a low iron content oxygen reduction reaction catalyst and aluminium covetic materials
… In addition to a study of ORR catalysts, the corrosion characteristics of covetic Al materials were also studied. Linear polarization curves show that the corrosion potential of covetic materials is increased compared to base alloy materials. However, Tafel fitting of the polarization curves …
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Hydrogen embrittlement of an Al-4.5Zn-2.5Mg alloy
… here for a 7017-T651 AlZnmg alloy where stress corrosion crack growth data on compact tension and double cantilever beam specimens has been obtained in distilled water, water saturated air vapour and aqueous chloride environments over a range of temperatures. The results, including fracture …
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Evaluation of the effectiveness of deep polymer impregnation as a corrosion abatement technique for overlaid bridge decks
The focus of this research was primarily on corrosion of the reinforcing steel (rebars) in bridge decks. It has been estimated that over $20 billion is required to repair or rehabilitate corrosion induced deficient bridge decks and that the cost is rising at the rate of $0.5 billion annually. …
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Understanding non-precious metal catalysts for the oxygen reduction reaction and investigating corrosion and surface properties of carbon-doped aluminum alloys
… studies involving electrocatalysis and corrosion can offer promising solutions to some of the most difficult challenges. The first chapter introduces each of these strategies in more detail. The next three chapters of this thesis describe efforts undertaken to understand the active …
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Corrosion fatigue initiation in stainless steels : The scanning reference electrode technique.
The early stages of damage by corrosion fatigue in austenitic and duplex stainless steel were studied using a novel scanning reference electrode technique (SRET). Emphasis was made on the role played by corrosion pits, which can act as stress concentrators and promote fatigue crack nucleation. SRET …
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Investigation of plasmaion vapor deposition (IVD) hybrid coatings for corrosion protection and plasma destruction of oral bacteria
… investigating low pressure plasma coatings for corrosion protection of aluminum ion vapor deposition (IVD) coated high-strength steels and in studying atmospheric non-thermal plasmas for destruction of oral bacteria. The objective of investigating plasma coatings for protection of IVD coated …
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Abrasion-corrosion and stress corrosion resistance of a 9Cr-2Ni-0.7Mo steel in simulated mine water
… formed the subject of this study. Its abrasion-corrosion and stress corrosion performances were assessed in laboratory tests simulating the underground environment in South African gold mines. The results indicate that the alloy performs favourably in abrasive-corrosive applications, …
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Assessment of Commercial Corrosion Inhibiting Admixtures for Reinforced Concrete
Corrosion of reinforcing steel in concrete exposed to chloride-laden environments is a well-known and documented phenomenon. The need for cost effective systems for protection against corrosion has become increasingly clear since the first observations of severe corrosion damage to interstate …
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Corrosion Behavior of Nuclear Waste Storage Canister Materials
… steel containers and accelerate the oxidation (corrosion) of steel. It is of interest to identify if pertechnetate anions pose a corrosion hazard to the mild steel nuclear waste storage tanks, under the conditions of the storage sites, as that can accelerate the degradation of the tanks and lead …
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ELECTROCHEMICAL SYNTHESIS OF MAGNETIC MATERIALS FOR MAGNETIC RECORDING AND MEMS APPLICATIONS
… saccharin incorporation in CoFe bath lowers the corrosion resistance of CoFe films. The corrosion potential dependence on the sulfur incorporation mechanisms in CoFe films was studied via an analytical model based on the mixed potential theory. As bit size decreases, new magnetic sensors that …
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