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1-20 of 23
Keywords: hydrogen peroxide
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Proceedings Papers
Hydrogen Peroxide Effect on Crack Growth Rate in X70 Pipeline Steel in Weak Acid Solution
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... specimens under static stress. Specimens were made from X70 steel grade. Electrochemical measurements were carried out in a Devanathan – Stachurski cell using foil mild steel membranes. The citrate buffer solution (pH 5.5) was background electrolyte. Hydrogen peroxide (H2O2), model...
Proceedings Papers
Cathodic Polarization Properties of Hydrogen Peroxide and the Effect on Electrochemical Corrosion Potential Calculation under Simulated BWR Environment
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...Abstract Hydrogen peroxide (H2O2) is the most important oxidant to determine the corrosive environment of boiling water reactors (BWRs). Since H2O2 is unstable at high temperature and electrochemical measurement in high purity water is difficult...
Proceedings Papers
Electrochemical Assessment of Corrosion Behavior of 316 Stainless Steel in Sodium Chlorate Solutions
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... in substantial increase of some impurities. Use of hydrogen peroxide was introduced for hypochlorite destruction. Operating conditions contributing to stainless steel corrosion Hypochlorite presence High residue of peroxide Low pH (below pH 8) High temperature Equipment conditions reducing stainless...
Proceedings Papers
Effect of Buffering on Electrochemical Corrosion Behavior of Alloy 800 in Sulfate Solutions Containing Hydrogen Peroxide
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...Abstract Corrosion behavior of Alloy 800 (UNS N08800) in the presence of hydrogen peroxide is important because of its potential application in the future power plants. The aim of this study is to evaluate how local variation of pH alters both the electrochemical reduction of hydrogen peroxide...
Proceedings Papers
Effect of Hydrogen Peroxide and Dissolved Oxygen on the Corrosion Rate of Titanium in Geological Disposal Environments
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...Abstract The corrosion rate of pure-titanium (Ti) was measured in a simulated ground water that contained small amounts of hydrogen peroxide (H2O2) up to 200 μ mol /ℓ, or was saturated with oxygen (O2) gas. The corrosion rate was measured under the Ti specimen...
Proceedings Papers
A Flow-Impingement Facility for Corrosion and Electrochemical Studies in High–Temperature Aqueous Solutions
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...Chemicals such as hydrogen peroxide and hydrazine decompose rapidly in high-temperature water. In order to study the effect of these chemicals on the ECP of the reactor materials, it is necessary to minimize the time between the solution preparation and testing. Using the system shown in Figure 8...
Proceedings Papers
Corrosion Behavior of Metals in SCW Environments Containing Salts and Oxygen
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... on the specimens was highly enriched with Cr and Mo, and depleted in Ni and Fe. sub- and supercritical water oxidation sodium chloride solution hydrogen peroxide pitting corrosion transpassive dissolution 316 stainless steel RESULTS AND DISCUSSION Distilled water containing H2O2 Figure...
Proceedings Papers
Potential Ennoblement of Stainless Steel by Marine Biofilm and Microbial Consortia Analysis
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... phenomenon to only stainless steel. Microorganisms in marine biofilm caused OCP ennoblement. Cathodic polarization curves elucidated that synergistic effects of hydrogen peroxide and acidity by marine biofilm probably caused OCP ennoblement in natural seawater. Furthermore, we analyzed microbial consortia...
Proceedings Papers
Corrosion Behavior of Constituent Metals of Stainless Alloys in SCWO Environments
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... hydrogen peroxide iron nickel chromium molybdenum titanium oxidation dissolution pitting corrosion transpassive dissolution INTRODUCTION Supercritical water oxidation (SCWO) has lately attracted considerable attention as a method of destroying hazardous and toxic wastes. This technology offers...
Proceedings Papers
A Novel Technique for Evaluating the Activity of Biocides against Biofilm Bacteria
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...biofilm biocide minimum biofilm eradication concentration MBEC Calgary Biofilm Device CBD sodium bromide activated sodium bromide chlorine glutaraldehyde isothiazolone quaternary compound polyquat hydrogen peroxide peracetic acid tetrakis(hydroxymethyl)phosphonium chloride...
Proceedings Papers
Development and Validation of ECP Model for BWR Application
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... on the electrochemical kinetic measurements in 288°C water containing H2O2 or O2+H2O2 mixture are needed to improve the current ECP model. BWR ECP 304 SS high temperature water oxygen hydrogen hydrogen peroxide mixed potential INTRODUCTION Intergranular...
Proceedings Papers
Acrolein Based Polymers as Scale Inhibitors
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...Abstract Polymers are widely used to prevent scaling in various applications. Whilst acrylic acid and maleic acid are often used for homo and copolymers, acrolein is unique as a monomer for polymeric scale inhibitors. The polymerization can be carried out by using hydrogen peroxide...
Proceedings Papers
Hazardous Material Decontamination with Potassium Permanganate for Refinery Turnarounds
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... for equipment cleaning are changing. Chemical oxidation (e.g. the use of potassium permanganate, hydrogen peroxide, sodium hypochlorite or "bleach") is one technique that is being used for the removal of these compounds. This paper will compare the effects of chemical oxidation, especially potassium...
Proceedings Papers
Effect of Zinc and Copper Additions on Catalytic Response of Noble Metal Alloyed 304 SS in High Temperature Water
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..., by covering catalytic sites, would alter the redox reaction rate. noble metal stainless steel zinc copper BWR electrochemical corrosion potential oxygen hydrogen hydrogen peroxide high temperature water INTRODUCTION The high temperature water in boiling water reactors (BWRs) is highly oxidizing due...
Proceedings Papers
Performance of Hydrogen Peroxide as a Cooling Water Biocide and Its Compatibility with Other Cooling Water Inhibitors
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...Hydrogen peroxide has been virtually ignored as a cooling water biocide. Even in non-cooling applications it is often used in conjunction with ozone or to generate peracetic acid to achieve satisfactory levels of disinfection ( 1 ). Yet when tested on its own against laboratory grown cultures...
Proceedings Papers
Electrochemical Polarization Measurement on 304 SS in High Temperature, High Purity Water
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... − E e ) / b o } Abstract The polarization behavior of the redox reactions of hydrogen (H2), oxygen (O2), and hydrogen peroxide (H2O2) on 304 stainless steel (SS) in high temperature, high purity water was studied in order to determine...
Proceedings Papers
Investigation of Oxide Film Formed on 304 SS in High Temperature Water Containing Oxygen, Hydrogen and Hydrogen Peroxide
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... water reactor (BWR) under normal water chemistry (NWC) conditions containing 100 - 300 ppb of oxygen and hydrogen peroxide and 10 -20 ppb of hydrogen. The IGSCC susceptibility is known to be attributed to the oxidizing water chemistry that consequently alters the oxide film chemistry and/or structure...
Proceedings Papers
Corrosion Behavior in Hydrogen Peroxide Bleaching Solutions
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...Pulp bleaching equipment is typically built from titanium to withstand the corrosive effects of chlorine based bleaches. In order for hydrogen peroxide to displace chlorine dioxide, titanium corrosion resistance must extend to hydrogen peroxide bleaching solutions which can be alkaline or acidic...
Proceedings Papers
Electrochemical and Microelectrode Studies of Stainless Steel Ennoblement
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...Abstract Ennobled open-circuit potential (Ecorr) for stainless steel exposed to fresh river water is investigated using microelectrodes to measure dissolved oxygen, hydrogen peroxide, and local Ecorr within the biofilm. Results indicate the biofilm is uniformly aerobic...
Proceedings Papers
Corrosion Potential Behavior of Noble Metal-Modified Alloys in High Temperature Water
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...Abstract The effect of Pd or Pt additions to various alloys on the corrosion potential behavior was investigated in 288°C water containing various amounts of oxygen, hydrogen, and hydrogen peroxide. The data showed that the noble-metal alloying additions to engineering materials improved...
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