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Showing 1 to 20 of 57 for “"half-cell"”.
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Sensitivity of Half-Cell Potential Measurements to Properties of Concrete Bridge Decks
Half-cell potential testing has been recommended as a non-destructive method for assessing the corrosion potential of reinforcing steel in concrete bridge decks. The technique is particularly useful because it can be utilized to evaluate the probability of corrosion before damage is evident at the …
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The influence of various factors on the results of carbonation, cover depth, half-cell potential and resistivity tests that are used in the assessment of reinforcement corrosion
… carrying out four of these tests, namely the half-cell potential (HCP), cover depth, carbonation and resistivity tests was performed on several concrete structures on upper campus at UCT. The half-cell potential and resistivity tests were carried out across a four-month period between August …
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Physics-Based Li-Svo Cathode Model
<p>A cathode half cell physics-based model for a St. Jude Medical fabricated silver vanadium oxide (SVO) cathode coin cell battery was constructed. The model is based on a single particle Fick's second law approach with the open-circuit potential modeled with a Redlich-Kister equation. By assuming …
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ΜΕΛΕΤΗ ΤΗΣ ΦΩΤΟΧΗΜΙΚΗΣ ΣΥΜΠΕΡΙΦΟΡΑΣ ΕΤΕΡΟΠΟΛΥΕΝΩΣΕΩΝ ΒΟΛΦΡΑΜΙΟΥ ΚΑΙ ΜΟΛΥΒΔΑΙΝΙΟΥ ΣΧΕΤΙΚΑ ΜΕ ΤΗΝ ΕΦΑΡΜΟΓΗ ΤΟΥΣ ΣΕ ΦΩΤΟΗΛΕΚΤΡΟΧΗΜΙΚΑ ΣΤΟ...
… DURING THE REACTION. THE PHOTOREDUCED "LIGHT" HALF CELL AND A SIMILAR "DARK" CELL IS THE BASIS FOR THE PHOTOGALVANIC CELL STUDIED. CONNECTION BETWEEN THETWO HALF-CELLS BOTH WITH PT ELECTRODES, PRODUCES A CURRENT UNTIL EQUILIBRIUM IS ESTABLISHED. THE "DARK" CELL IS AIR OXIDIZED TO THE ORIGINAL …
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Development of an Index for Concrete Bridge Deck Management in Utah
… inspection, sounding, Schmidt hammer testing, half-cell potential testing, and chloride concentration testing were performed on six 6-ft by 6-ft test areas randomly distributed within the single lane closed to traffic on each deck, and testing protocols followed American Society for Testing and …
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Development of measurement techniques for evaluation of inhibitors for controlling rebar corrosion in concrete
… the effects of the rebar network on corrosion. Half-cell potential measurements were used to monitor the corrosion behavior of each specimen. In a second time, calcium nitrite, monofluorophosphate and sodium borate were evaluated for their capacity to control corrosion. The various corrosion …
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Reducing of iron corrosion in water pipelines by hydrogen addition
… the electrochemical potential of the hydrogen half-cell reaction can be reduce by dissolution of hydrogen gas in the water. If that value can be reduced enough then the oxidation of iron will be thermodynamically forbidden. If that condition cannot be obtained, then reduction of the …
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Mechanical Properties and Electrochemical Durability of Solid Oxide Fuel Cells
… aged constituent materials for solid oxide fuel cells were evaluated using microindentation, plate tensile, four-point bend, ball on ring and pressure on ring tests. The Vickers hardness of the anode, interconnect and electrolyte was determined before and after 1000 hours aging at 1000 oC in air. …
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Solar Farm Utilizing a Battery Energy Storage System
… California that achieves peak load shaving. Full cell modules and half-cell modules were explored to determine the type that best suits this project. The half-cell modules were best suited because of the increased efficiency. Six different solar farm designs were created, four fixed tilt designs …
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Chemical treatment of corroding steel reinforcement after removal of chloride contaminated concrete
… subjected to repeated exposure to NaCl solution. Half-cell potential, corrosion rate, and chloride ion concentration measurements were conducted until the indication of active reinforcement corrosion. Chloride contaminated concrete was removed to the rebar level through a grooving process. The …
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Influence of Reinforcing Steel Parameters on the Formation of the Passive Layer
… has been conducted on the effects of macrocell corrosion compared to microcell corrosion. Previous studies have shown that the measured microcell corrosion is not augmented greatly by the macrocell current (Andrade et al. 1991). In this study, twenty-seven specimens were cast with …
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Effect of Stay-in-Place Metal Forms on Performance of Concrete Bridge Decks
… hammer sounding, Schmidt hammer testing, half-cell potential testing, and chloride concentration testing. Because differences in deck age and average cover for the two deck types were found to be statistically significant, the collected data were subjected to analysis of covariance …
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Formal Potential of the Chromate-Chromic System in Sulfuric Acid
… of the formal potential of the chromate-chromic half-cell would be of considerable interest and since very few measurements of this potential were found in literature, an investigation of its determination was undertaken. The usual concept of formal potential is the potential value for a certain …
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The reduction of organic compounds of sulfur by metals in liquid ammonia
… for the first time. 2. A metal with a high half-cell potential favors a greater extent of reduction than a lower potential metal. 3. The greater the concentration of ammonium ion as a proton donor, the greater will be the evolution of hydrogen, and the lower will be the extent of reduction. …
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Characterizing the Effects of Jasplakinolide on Mesostoma Ehrenbergii Primary Spermatocytes to Study the Role of Actin during Chromosome Movement
… has been found in the meiotic spindle of other cell types. Additionally, myosin has been implicated in Mesostoma chromosome movement, suggesting actin may be present since they work together in other systems. Jasplakinolide altered chromosome oscillation speeds and caused the precocious furrow …
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Quantitative Fracture Strength of Lithiated Tin Oxide Nanowires by In-Situ SEM Tensile Experiments
… steel growth substrates by the electrochemical half-cell method which did not involve the use of binders or conductive agents. The fracture strength decreased from 2.4 GPa ± 0.2 GPa for the pristine SnO2 nanowires to 814.8 MPa ± 429.7 MPa for the lithiated SnO2 nanowires. This study provides the …
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The effects of chemical pressurization on screen electrode fuel cells
A large amount of fuel cell research focuses on porous gas diffusion (PGD) fuel cells which currently produce the best power density. However, this sect of fuel cell technology has many obstacles to overcome before becoming a viable large scale source or power. Nevertheless, alternatives to PGD …
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Investigations of rate limitation in nanostructured composite electrodes and experiments towards a 3D Li-ion microbattery
… was suggested the observed rate performance of half-cell 3D microbatteries, based on a manganese dioxide cathode and a lithium foil anode, was limited by the lithium ion transport distance through the porous 3D structure. The electrodeposition of conformal polymers layers onto 3D substrates was …
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Non-Destructive Bridge Deck Condition Assessment with a Probability-Based Deterioration Threshold
… for ground penetrating radar and volts for half-cell potential), making data interpretation and comparison difficult for bridge owners and practitioners. The deterioration threshold, or the transition between healthy and deteriorated areas, is essential in understanding NDE data. However, …
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ASSESSING CORROSION DAMAGE IN PRESTRESSED CONCRETE WITH ACOUSTIC EMISSION
… to serve as anode of the rapid corrosion cell. Specimens were either notched or unotched and 0.016 inch (0.4 mm) cracks were extended through the centerline of the specimens via three-point bending to analyze the effect of crack presence in byproduct development.</p> <p>The corrosion …
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