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Showing 1 to 20 of 30 for “"galvanic corrosion"”.
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Galvanic Corrosion of Aluminum/Carbon Composite Systems
… composites (CFRP) are typically considered corrosion resistant when used alone, but can develop severe galvanic corrosion when in physical contact in the same component or structure.</p> <p>General engineering practice is to avoid contact between aluminum and CFRP in any application where …
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One Dimensional Approach to Modeling Damage Evolution in Galvanic Corrosion
… is developed to describe damage evolution in galvanic corrosion for a variety of geometries. An asymptotic procedure taking advantage of disparity in length scales is used to derive the model. The focus of this thesis is to detail the formulation and solution of the 1D model for basic …
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Practical Impacts of Galvanic Corrosion in Water Service Lines and Premise Plumbing
… dissimilar metals results in the accelerated corrosion of the less noble metal via galvanic attack, increasing metal concentrations in water and posing potential public health risks. Many practical problems associated with stopping galvanic attack between copper:galvanized iron and copper:lead …
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Effect of Galvanic Corrosion on Crack Propagation of Cold Expanded Holes in AA2024-T3
… without addition of weight. However, localized galvanic corrosion may be induced, since cold-worked holes are often fastened to dissimilar materials. While cold expansion on holes with initial cracks has shown to obtain the same benefits in previous research, another step must be taken to …
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Reconsidering Lead Corrosion in Drinking Water: Product Testing, Direct Chloramine Attack and Galvanic Corrosion
… existing performance 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 …
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Lead (Pb) Contamination of Potable Water: Public Health Impacts, Galvanic Corrosion and Quantification Considerations
… of potential long-term problems arising from galvanic corrosion between the remaining lead pipe and the newly installed copper pipe. Bench-scale experiments demonstrated that galvanic connections between lead pipe (new or aged) and copper pipe increased lead release into the water by 1.1-16 …
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Galvanic Corrosion of High-Temperature Low-Sag (HTLS) High Voltage Conductors: New Materials—New Challenges
… but there might be some concerns about their corrosion resistance.</p> <p>These new conductors use materials relatively new to the power industry, such as advanced carbon fiber polymer matrix composites and unique metal matrix composites/nano-composites predominantly used in aerospace …
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New Insights into Lead and Copper Corrosion: Impacts of Galvanic Corrosion, Flow Pattern, Potential Reversal, and Natural Organic Matter
… concentrations in potable water, but accelerated corrosion of lead in potable water systems due to a galvanic connection to copper remains a significant health risk to consumers. In addition to elevated lead release due to galvanic corrosion of lead-tin solder and leaded brass fixtures, partial …
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Redox Reactions Influencing Lead Concentrations in Drinking Water: Formation and Dissolution of Lead(IV) Oxide and Impact of Galvanic Corrosion
… optimizing water chemistry to form stable lead corrosion products and replacing lead service lines with lead-free materials. The present study investigated the effects of water chemistry on the formation and dissolution of the lead corrosion product lead(IV) oxide: PbO2). The impact of galvanic …
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Corrosion Behavior of ASTM A1010 Stainless Steel for Applications in Bridge Components
… of this research was the investigation of the corrosion behavior of a low chromium-content stainless steel, ASTM A1010, for use in steel bridge members. This stainless steel has been marketed as a potential replacement for conventional structural steels for bridges located in highly-corrosive …
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Kinetic Property and SS 316/Alloy 617 Corrosion Study in Molten Chloride and Fluoride Salts
… density i_0 of the electrochemical reactions of corrosion products (Fe, Cr and Ni ions) and corrosive species (OH-), and corrosion studies of structural materials (SS 316H and Alloy 617), including static corrosion and galvanic corrosion, in molten MgCl2-NaCl-KCl and/or NaF-KF-UF4-UF3 salts in a …
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Influence of alloying and processing on the degradation properties of Mg-Dy-Zn alloys under physiological conditions
… these procedures and subsequently introduce the galvanic corrosion, which may accelerate the degradation of Mg alloys. To investigate the types, amounts and distributions of intermetallics and their effects on the degradation behavior, Dy and Zn were selected as alloying elements, which have been …
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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 …
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Chloride Sulfate Mass Ratio (CSMR) and Nitrate Acceleration of Galvanic Lead- Bearing Solder Corrosion
Lead corrosion in premise plumbing systems from materials, such as lead pipes, soldered joints, and brass, can cause elevated lead in drinking water. This work examined mechanisms by which galvanic corrosion of lead solder:copper joints is accelerated by high chloride, low sulfate, and high nitrate …
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Telluridm-induced corrosion of structural alloys for nuclear applications in molten salts
… by which tellurium causes intergranular corrosion (IGC) of structural alloys in molten salt reactors is currently poorly understood. Limited corrosion testing has been performed on a few select alloys in simulated reactor conditions. In this thesis, the results of performing 50 h, 100 h, …
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COLD SPRAYED COATINGS WITH DUAL NANOPARTICLE REINFORCEMENTS FOR WEAR AND CORROSION PROTECTION
… testing parameters is required. Additionally, corrosion testing was performed on cold sprayed samples for 500- and 2,000-hr trials in a salt fog chamber, revealing underlying pitting corrosion and galvanic corrosion vulnerabilities of the coatings. In the right application, the U.S. Navy could …
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The design of a functionally graded composite for service in high temperature lead and lead-bismuth cooled nuclear reactors
… performance criteria of high strength and corrosion resistance. A Functionally Graded Composite (FGC) was created with layers engineered to perform these functions. F91 was chosen as the structural layer of the composite for its strength and radiation resistance. Fe-12Cr- 2Si, an alloy …
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Computational modeling and design of multilayer corrosion coatings for galvanic protection of steel
… but often suffer from high susceptibility to corrosion in relevant environments. Use of metallic coatings, particularly zinc alloys, has long been a widely employed method for corrosion protection of steel, by acting both as a physical barrier to the aggressive environment, and providing …
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CATHODIC PROTECTION OF REINFORCEMENT BARS IN CONCRETE
… of various aspects of cathodic protection in corrosion prevention of the steel reinforcement in concrete. The performance evaluation of cathodic protection, a very important aspect in its operation was widely dealt with. Various criteria used in the cathodic protection of reinforced concrete …
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Assessment of the corrosion behaviour of alloys 825 and 625 in stagnant seawater-effect of temperature and welding
… wellheads, risers and valves. The outstanding corrosion resistance of alloy 825 against general and localised corrosion attack is attributed to its high Ni, Cr and Mo content. However, corrosion failures of alloy 825 equipment have been observed in offshore environments. Alloy 825 has good …
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