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Showing 1 to 18 of 18 for “"iron corrosion"”.
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Effect of various dissolved species on anaerobic iron corrosion
Iron corrosion is an extremely complicated process because numerous factors such as pH, DO, temperature, inhibitor, and other various constituents in water can exert a controlling influence. The economic importance of problems that are caused by corrosion has been recognized. Therefore, the …
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Reducing of iron corrosion in water pipelines by hydrogen addition
… the water becomes polluted with soluble iron.;The corrosion of iron in the pipelines is the result of an oxidation reduction reaction. In that reaction hydrogen ion is reduced and the iron is oxidized. The hypothesis of this thesis is that the electrochemical potential of the hydrogen …
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Relative Effects of Water Chemistry on Aspects of Iron Corrosion
… dollars, and costs associated with deteriorating iron pipes is billions of dollars per year. Problems arising from iron corrosion include reduced lifetime of the material, scale buildup and energy loss, nonuniform corrosion and leaks, catastrophic failure, "red water," disinfectant loss and …
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Evaluation of Iron Corrosion Release Models for Water Distribution Systems
… sources may vary, it is generally accepted that iron rust resulting from corrosion of iron based pipes is the predominant cause of red water issues. Recent efforts have lead to the development of a number of models that predict the occurrence of iron release and subsequent red water formation. …
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Phosphorus in the Environment and its Role in Anaerobic Iron Corrosion
… aspects of eutrophication, microbial nutrition, corrosion and other environmental processes. It is commonly assumed that phosphorus occurs exclusively as phosphate (+5) in nature. In fact, although phosphate is undoubtedly dominant in many systems, phosphorus compounds with lower oxidation states …
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The Influence of Water Chemistry on H2 Production and Uptake during Anaerobic Iron Corrosion
Iron corrosion is the most important economic and aesthetic problem facing utilities. In the water distribution system, problems caused by iron corrosion include "red water", scale buildup, and pipe failures. It is necessary to improve our mechanistic understanding of anaerobic iron corrosion in …
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Water Quality Factors Influencing Iron and Lead Corrosion in Drinking Water
Corrosion is one of the most complicated and costly problems facing drinking water utilities. Corrosion of iron pipes can lead to economic losses and customer complaints, while lead corrosion poses a serious health risk. This work first synthesizes nearly 100 years of iron corrosion research to …
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Iron Release From Corrosion Scales in Old Iron /Steel Drinking Water Distribution Pipes
… the issues of the formation and growth of iron corrosion scales, and their reactions that lead to colored water problems. According to the model, iron release from corrosion scales can be controlled, in general, by either (a) promoting a denser scale microstructure, or (b) inhibiting …
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Opportunistic Pathogens and the Brain-eating Amoeba, Naegleria fowleri in Reclaimed Water, Municipal Drinking Water, and Private Well Water
… of research explored the role of nitrification, iron corrosion, and disinfectant on the growth of N. fowleri both in municipal drinking water from a city grappling with aging water infrastructure and untreated private well water. Results from the simulated reclaimed water distribution systems …
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The Effect of Water Chemistry on the Properties of Iron Particles and Aqueous Iron Suspensions Derived From the Oxidation of iron(II)
"The properties of iron particles and colloids are important in understanding the properties of iron corrosion scale and deposits, iron release mechanisms, the stability and mobility of iron particles in water, and the color and turbidity of aqueous iron suspensions. Their properties are also …
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Evaluation of the KanchanTM Arsenic Filter under various water quality conditions of the Nawalparasi District, Nepal
… of Technology Department of Civil and Environmental Engineering partnered with the Environment and Public Health Organization to develop and disseminate the KanchanTM Arsenic Filter (KAF) for the low-cost removal of arsenic from drinking water in rural Nepal. In this system, arsenic is …
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Advancing the Understanding of Water Distribution System Corrosion: Effects of Chlorine and Aluminum on Copper Pitting, Temperature Gradients on Copper Corrosion, and Silica on Iron Release
… by increased chlorine decay rates, non-uniform corrosion, and rising corrosion potentials. Temperature changes had been suspected to increase copper pitting frequency and copper release to drinking water. Experiments examined the effect of temperature gradients on copper pipe corrosion during …
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Dose Determines if Soluble Copper is a Nutrient or an Antimicrobial for Legionella pneumophila in Premise Plumbing
… On this basis it was also hypothesized that iron hydroxide would have similar effects and that lower levels of copper may act as a nutrient encouraging Legionella growth. Here we conducted complementary experiments at bench, microcosm and pilot-scale to evaluate the effect of copper …
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GVWD corrosion control initiative, phase II: inhibitor chemical testing at Seymour Dam
… District (GVRD) waters have some of the highest corrosion potentials in North America. A previous pilot study determined that copper corrosion could be reduced by 60 to 80 percent and lead corrosion could be reduced by10 to 60 percent by disinfecting with chloramine instead of chlorine and by …
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Lead and Copper Contamination in Potable Water: Impacts of Redox Gradients, Water Age, Water Main Pipe Materials and Temperature
… contaminated with lead and copper due to the corrosion of pipes, faucets, and fixtures. The US Environmental Protection Agency Lead and Copper Rule (LCR) is intended to target sampling at high-risk sites to help protect public health by minimizing lead and copper levels in drinking water. The …
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Phosphate use for Sequestration, Anti-Scaling, and Corrosion Control: Critical Review, Simultaneous Optimization of Polyphosphate Dosing, Sequestration Mechanisms, and Stabilization of Magnesium Silicate Scale
… used by drinking water utilities to 1) reduce iron/manganese aesthetic problems by sequestration, 2) inhibit calcium carbonate scale formation via threshold inhibition, and 3) reduce corrosion of pipes by forming protective pipe scales. Orthophosphates can control lead, copper and iron …
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XRF and the Corrosion Environment at Camp Lawton: A Comprehensive Study of the Archeological Microenvironment of a Civil War Prison Camp
… between a given ferrous metallic artifact's corrosion environment (the surrounding soil matrix) and the subsequent corrosion products formed on the artifact. The hypothesis is that the data will demonstrate a chemical correlation between the two. Iron and chlorine are the two major elements …