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Showing 1 to 20 of 56 for “"potentiodynamic"”.
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Electrochemical Disinfection of Liquid Human Waste Using Potentiodynamic Methods and Controlled Electrode Surface Chemistry
… It is found that both can be operated in potentiodynamic modes to control surface chemistry and improve generation of biocidal oxidants such as hydrogen peroxide and chlorine</p><p>in blackwater containing solutions. Use of a packed-bed electrochemical reactor is also studied in the …
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Síntese e caracterização de ligas nanocristalinas à base de cobre e zircônio com elevada capacidade de formação de estado vítreo
… were performed through nanoindentation, potentiodynamic polarization and hydrogenation followed by thermal dessorption spectrometry experiments. Nanoindentation results did not show appreciable difference between samples produced conventionally and with suction casting. Potentiodynamic …
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Assessing and Enhancing Seawater Corrosion Performance of Aluminum Alloy 7075 and 2024 Additive Repairs Produced by Cold Gas Dynamic Spray Deposition
… can have very similar activity, reactivity, and potentiodynamic response compared to their wrought counterparts, and that CS deposits can even have superior pitting performance. CS corrosion properties, especially activity, change depending on powder heat treatment due to the resulting …
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Corrosion Behavior of Nuclear Waste Storage Canister Materials
… Electrochemical behavior was evaluated using potentiodynamic polarization tests, and the surface morphology was studied using optical microscopy and scanning electron microscopy. Potentiodynamic polarization tests were conducted in 1.0M NaNO3 + 0.1M NaOH and 1.0M NaNO3 + 0.1M NaOH + 0.02M …
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Synthesis and Characterization of Ag and Cu doped DLC Thin Films for Anti-microbial Applications
… corrosion performance was investigated using potentiodynamic polarization tests. The results showed appreciable reduction in residual stress and a slight decrease in hardness with Ag doping up to 13.2 at.% and Cu doping up to 8.1 at.%. However, higher doping levels drastically reduced …
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Aqueous hydrogen sulphide corrosion of iron, iron/chromium and iron/nickle alloys.
… with electrode kinetic methods, in this instance potentiodynamic polarization, are usually concerned with reproducibility. However, to gain meaningful kinetic data it is also necessary to account for the contribution to the measured potential of the electrical resistance of the electrolyte and …
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Electrode materials for the electrolysis of metal oxides
… potentiostatic electrolysis. The intermediate potentiodynamic scan-rate displays the transition from platinum to iridium dominated current density.
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Synthesis, physical properties and processing of multifunctional molecular materials
… potentiostatic and (PEDOT), potentiodynamic electropolymerization, PEDOT films doped with magnetic polyoxometalate (POM) [Co4(H2O)2(PW9O34)2]10- have been obtained; the film obtained by using the potentiodynamic method is more stable than the analogous material obtained by …
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Cracking of zirconium alloys at constant load with and without applied potentials
… corrosion behavior was studied by cyclic potentiodynamic polarization technique. Metallurgical microstructures and fractography were analyzed by optical microscopy and scanning electron microscopy (SEM), respectively. The results obtained from this study indicate that no failures were …
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Evaluation of cracking and localized corrosion behavior of cladding materials
… hydrogen effect on the cracking behavior. Cyclic potentiodynamic polarization technique was used to determine the localized corrosion susceptibility. The metallography and morphology of failure were analyzed by optical microscopy and scanning electron microscopy (SEM), respectively. No cracking …
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A Rubric for Electrochemical Testing of Metallic Biomaterials
… alloy Ti6Al4V, welded and non-welded. Linear, potentiodynamic, and cyclic polarization curves were produced by the PARC 2273 potentiostat showing the corrosion tendencies of the metals in four unique solutions 3.5% NaCl, 0.35% NaCl, phosphate buffered saline solution (PBS), and Butterfield …
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Corrosion Studies of Molten Chloride Salt: Electrochemical Measurements and Forced Flow Loop Tests
… products and develops a new analysis theory for potentiodynamic polarization data obtained from cathodic diffusion-controlled reactions. Additionally, the design and operation experience of a forced convection chloride molten salt loop is shared. Particularly, the study presents novel findings on …
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The influence of copper addition on the corrosion behaviour of low nickel austenitic stainless steels
… and aged conditions. These tests included potentiodynamic scans, polarisation resistance measurements and Tafel plots conducted in 5 volume % de-aerated sulphuric acid solution at 30°C as well as pitting tests in NaCl solutions. The results showed that all three alloys displayed the lowest …
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Corrosion and high-temperature deformation characteristics of a target structural material for transmutation applications
… by using slow-strain-rate (SSR) and cyclic potentiodynamic polarization (CPP) techniques, respectively. The results of tensile testing indicate that the yield strength and ultimate tensile strength were gradually reduced with increasing temperature. However, as expected, the ductility …
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Effect of heat treatment on deformation and corrosion behavior of Type 422 stainless steel
… localized corrosion studies conducted by cyclic potentiodynamic polarization technique indicate that the critical corrosion potential became more active (negative) at higher testing temperature in specimens exposed to both neutral and acidic environments. Evaluation of the primary fracture face …
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C2- and C3-Symmetric Meta-substituted Thienyl Benzenes: A Comparative Synthetic and Structural Study
… (n = 0) and Stille (n = 1) coupling reactions. Potentiodynamic treatment of these compounds produces polymers whose properties as a function of the length of the thienyl substituent (n= 1 vs. n = 2), and of cross-linking (C2 vs. C3), are compared. The solidstate structures of C2- and …
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Computational and adsorption investigation of some quinoxaline derivatives on selected metals in acidic media
… impedance spectroscopy (EIS), and potentiodynamic polarization (PDP). Fourier transform infrared spectroscopy (FTIR) was utilized to give more insight into the functional groups that formed or disappeared during the adsorption/desorption of the studied quinoxaline molecules on the …
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Analytical studies of corrosion and wear resistant CrN/NbN superlattice PVD coatings.
… resistance of the coatings was determined using potentiodynamic polarisation measurement in a 3%NaCl solution open to air at room temperature. The low temperature CrN/NbN coatings deposited onto stainless steel exhibited superior corrosion resistance properties than that for stainless steel. Both …
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Boron induced surface modification of transition metals
… for tantalum, niobium and tungsten respectively. Potentiodynamic corrosion resistance testing was performed in 4% NaCl for the three metals. The boronized transition metals exhibited better resistance to polarization than the unboronized transition metals indicating better corrosion resistance for …
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