Готові списки джерел за темами / Polarization-change curve

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Добірка наукової літератури з теми "Polarization-change curve"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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Статті в журналах з теми "Polarization-change curve"

C., P. Ukpaka. "Mathematical model to predict the characteristics of polarization in dielectric materials: The concept of piezoelectrcity and electrostriction." Chemistry International 5, no. 3 (2019): 232–40. https://doi.org/10.5281/zenodo.2525583.

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Model was developed for the prediction of polarization characteristics in a dielectric material exhibiting piezoelectricity and electrostriction based on mathematical equations and MATLAB computer simulation software. The model was developed based on equations of polarization and piezoelectric constitutive law and the functional coefficient  of Lead Zirconate Titanate (PZT) crystal material used was 2.3×10<sup>-6</sup> m (thickness), the model further allows the input of basic material and calculation of parameters of applied voltage levels, applied stress, pressure, dielectric mate

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Soltanova, Natavan, Gunel Mirzaliyeva, RUHENGIZ HUSEYNOVA, Aygun Zeynalova, TOFIG ALIYEV, and Sevinj Dadashova. "ELECTRO RECOVERY OF TELLURUM IONS FROM NON-AQUEOUS N-N DIMETHYLFORMAMIDE ELECTROLYTE." NAKHCHIVAN STATE UNIVERSITY SCIENTIFIC WORKS 1, no. 126 (2024): 112–20. https://doi.org/10.69760/y50gt241.

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The work presents studies of the mechanism of recovery of tellurium ions from non-aqueous N N dimethylformamide. For this, linear and cyclic current-voltage polarization curves have been recorded. The influence on the process of the concentration of tellurium ions, change of potential sweep rate and temperature has been investigated. By recording linear polarization curves, it has been established that the reducing process of tellurium ions is controlled by their diffusion to the cathode surface. The influence of the concentration of its ions in the electrolyte, the rate of change of the poten

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Tong, Maosong, Li Li, Weinan Wang, and Yizhong Jiang. "Determining capillary-pressure curve, pore-size distribution, and permeability from induced polarization of shaley sand." GEOPHYSICS 71, no. 3 (2006): N33—N40. http://dx.doi.org/10.1190/1.2195989.

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An appropriate form of induced polarization (IP) acts as a bridge between the structure of a water-saturated core plug and its transport properties. The induced-polarization decay curves of natural rocks can be modeled as a weighted superposition of exponential relaxations. A singular-value decomposition method makes it possible to transform the induced-polarization decay data of the shaley sands into relaxation-time spectrum, defined as plot of weight versus the relaxation-time constant. We measured the induced-polarization decay curves of core samples from a formation of Daqing oil field usi

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Ohashi, Takayuki, Rintaro Aoyagi, Masaki Maeda, and Makoto Iwata. "Electrical Properties and Polarization Reversal in (Li,Na)NbO₃ Lead-Free Piezoelectric Ceramics." Key Engineering Materials 485 (July 2011): 69–72. http://dx.doi.org/10.4028/www.scientific.net/kem.485.69.

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In this study, the relationships between the electrical properties and polarization switching of lead-free (Li0.06Na0.94)NbO3 (LNN6) ceramics were investigated. The electrical properties of stoichiometric LNN6 did not change with polarization switching. On the other hand, the frequency dependence of the impedance of Na-deficient LNN decreased with polarization switching, and the coupling factor kp, the piezoelecric constant d33 and the dielectric constant ε33T/ε0 decreased with polarization switching. Moreover, the dielectric curve of Na-deficient LNN6 after 10 switchings showed peaks at appro

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Li, Ji Dong, Ming Jie Zhang, Yi Yong Wang, and Xin Gang Ai. "Research on Polarization Curve and Anode Discharge Mechanism in Electrolysis Cells for Preparation of Al-Li Alloys." Advanced Materials Research 233-235 (May 2011): 2913–17. http://dx.doi.org/10.4028/www.scientific.net/amr.233-235.2913.

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At 953K, anodic over voltage by electrolyzing LiCl and Li2CO3 were measured respectively by continuous pulse oscillograph method in a mixture fused salt of LiCl-LiF in a laboratory electrolyte cell and the change of polarization curve obtained was studied as well. According to kinetics of electrode process theory, we calculated and analyzed anode reaction mechanism and reaction rate-determining step. The results indicate that when over voltage entered into the Tafel zone with current density in range of 0.1 to 0.3A·cm-2, electrode reaction of LiCl is controlled by electrochemical polarization

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Xu, Wen Dond, and Jing Zhao Li. "Spectrum Comparative Analysis of the Frequency Domain Complex Cole-Cole Mode." Applied Mechanics and Materials 220-223 (November 2012): 2491–94. http://dx.doi.org/10.4028/www.scientific.net/amm.220-223.2491.

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Using MATLAB the spectrum comparative analysis was gived between complex Cole-Cole model and basic Cole-Cole model when theirs parameters change. The results show that the complex resistivity curve shape of complex model is limitted by total variation of two same kind parameters of complex model. The variation rule of the curve shape is consistent with basic mode when same kind parameters change. The influent of polarization rate and frequency correlation coefficient is bigger than time constant parameter. The resistivity curve of parallel complex model and series complex model is very similar

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Geake, J. E., and M. Geake. "A remote-sensing method for sub-wavelength grains on planetary surfaces by optical polarimetry." Monthly Notices of the Royal Astronomical Society 245, no. 1 (1990): 46. http://dx.doi.org/10.1093/mnras/245.1.46.

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Summary Some optical polarization effects for very fine powders are shown. The well-known curve of polarization versus phase angle is found to change in shape and scale when the grain size is reduced to less than the wavelength; strong negative polarization is found, even for a smooth powder surface of high albedo. The negative peak changes in shape, and its parameters are found to be related to grain size in simple ways. This distinctive shape provides a possible remote-sensing method for detecting subwavelength grains on planetary surfaces.

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Ahmadian, Z., I. Danaee, and M. A. Golozar. "Effect of Surface Treatment on Corrosion Resistance of 304 Stainless Steel Implants in Tyrode Solution." Archives of Metallurgy and Materials 59, no. 1 (2014): 25–30. http://dx.doi.org/10.2478/amm-2014-0004.

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Abstract The effect of different surface preparation methods such as mechanical, chemical and electrochemical surface preparation on the formation, stability and deterioration of surface films formed on austenitic 304 stainless steel was investigated in Tyrode’s physiological solution by cyclic polarization curves, AC impedance measurements surface techniques. A hysteresis loop in a cyclic polarization curve was obtained that indicates a delay in repassivation of an existing pit when the potential is scanned cathodically. Electrolytic polishing and ultrasonic cleaning improves corrosion resist

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Wang, H. Y., X. K. Zhan, S. C. Wang, and Z. Y. Li. "Q-switching pulse and mode-locked square-wave pulse generated in a fiber ring laser based on nonlinear polarization rotation." Laser Physics 32, no. 11 (2022): 115101. http://dx.doi.org/10.1088/1555-6611/ac9788.

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Abstract We observe anomalous modes including Q-switching pulses and mode-locked square-wave pulses generated in a dual-gain-media fiber ring laser based on nonlinear polarization rotation in a semiconductor optical amplifier. We disclose the evolution process between them, and present in detail the temporal and spectra profiles of the output pulses. We find that the width of the square-wave pulse can be varied continuously from 500 ps to 165 ns by increasing the semiconductor optical amplifier (SOA) current or rotating the polarization controllers in the ring. The width of the pulse varies al

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Huang, Kai, Liangchun He, Shuaishuai Wang, Huizheng Li, Yigang Chen, and Haibo Guo. "Study on corrosion resistance of AlCu_xNiTiZr multi-principal element alloy films in NaCl solution." AIP Advances 12, no. 4 (2022): 045208. http://dx.doi.org/10.1063/5.0088629.

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The corrosion resistance of multi-principal element alloy (MPEA) films is complex dependent on their composition. The purpose of this paper is to explain the relationship between the corrosion resistance and the Cu content of AlCu xNiTiZr MPEA films. AlCu xNiTiZr films were deposited by magnetron sputtering. Their corrosion resistance in 3.5 wt. % NaCl was studied by potentiodynamic polarization experiment and inductively coupled plasma emission spectroscopy. In this paper, the potentiodynamic polarization curve is analyzed from the perspective of corrosion type and corrosion control. Combined

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Більше джерел

Частини книг з теми "Polarization-change curve"

REDA-CRUZ, Alfredo, Salatiel PÉREZ-MONTEJO, Damian CALAN-CANCHE, and José Enrique FLORES-CHAN. "Feasibility study of alloy Al80Mg20% weight, heat-treated as energy material." In Engineering and Applied Sciences. ECORFAN, 2023. http://dx.doi.org/10.35429/h.2023.6.67.75.

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The purpose of this research is to evaluate the effect of the aging heat treatment and the electrochemical behavior of the alloy (Al80Mg20% weight), for energy purposes through corrosion processes. Hydrogen generation sources currently have a high cost, and their large-scale implementation has been of great interest in research. Aluminum and its alloys have great potential as energetic materials due to their low cost, performance, and availability. The Aluminum-Magnesium alloy Al80Mg20% weight was obtained by casting and subsequently subjected to an aging heat treatment that favored microstruc

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Calan-Canche, Damián, Alfredo Reda-Cruz, Jorge González-Sánchez, and J. E. Flores-Chan. "Effect of microstructural changes associated with hydrogen damage in API 5L X60 steels." In Sustainable Materials Engineering. ECORFAN, 2024. https://doi.org/10.35429/h.2024.14.78.88.

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The effect of unconventional heat treatment and electrochemical behavior on API 5L X60 steel is evaluated by electrochemical processes/mechanisms associated with corrosion. The susceptibility to hydrogen absorption in soil solutions representative of the State of Campeche, Mexico, was evaluated. In the energy, chemical, metallurgical/mechanical, and petrochemical industries, API 5L X60 steel is used for storage tanks and pipelines for the transportation and transmission of oil and gas. These steels are in contact with different aggressive environments and are therefore subject to different deg

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Тези доповідей конференцій з теми "Polarization-change curve"

Johnsen, Roy, Henrik Olavesen, Amin H. Zavieh, and Tomas L. Erlien. "Effect of Cathodic Polarization on Localized Corrosion of 25Cr in Seawater." In CORROSION 2019. NACE International, 2019. https://doi.org/10.5006/c2019-12870.

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Abstract Duplex stainless steel (25Cr) can suffer from corrosion in chlorinated seawater at temperatures exceeding 20°C according to ISO 21457. To prevent corrosion, cathodic protection from attached sacrificial anodes is often used. However, this can cause hydrogen stress cracking (HSC) on the alloy assuming tensile stresses above certain levels occur in the component. Some HSC failures have been observed on submerged seawater pumps assemblies made from 25Cr duplex stainless steel protected by sacrificial anodes. To avoid HSC to initiate, anodes have been removed on some pumps. Despite the fa

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Leinonen, H., T. Saario, and H. Hänninen. "Prediction of Stress Corrosion Cracking Susceptibility of Nitrogen Alloyed Stainless Steels in 50% CaCl2 Solution." In CORROSION 1997. NACE International, 1997. https://doi.org/10.5006/c1997-97189.

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Abstract Stress corrosion cracking (SCC) susceptibility of austenitic Type AISI 304L, AISI 316L stainless steels and nitrogen alloyed Type AISI 301 steels in 50% CaCl2 solution at 373 K (100°C) under open-circuit potential and cathodic polarization conditions was studied using a constant load test method. The electrical properties of the surface films formed were monitored as a function of time and potential by means of the Contact Electric Resistance (CER) method. The steady state strain rate (ε˙ss) obtained from the corrosion elongation curve (elongation vs. time curve) showed a linear depen

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Hernandez, M. A., J. Genesca, and J. Uruchurtu. "Electrochemical Characterization of an Al-Zn-In Galvanic Anode." In CORROSION 2002. NACE International, 2002. https://doi.org/10.5006/c2002-02022.

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Abstract The electrochemical behavior of an Al-Zn-In anode was studied by means of the following techniques: Polarization Curve Measurements, Electrochemical Noise and Electrochemical Impedance, using two different electrochemical cell arrangements. The Electrochemical cell arrangements were: Al-Zn-In anode, saturated calomel electrode and platinum wire as the working electrode, reference and counter electrode, respectively (First System)Two identical Al-Zn-In as a working electiode (Second System) At different concentration levels of sodium chloride (NaCl), from 3% wt to 0.001% wt, the dissol

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Wang, S. G., X. D. Bai, G. X. Lian, Q. Zhao, H. M. Chen, and Y. D. Fan. "A Systematic Investigation of Irradiation Corrosion of Nuclear Materials." In CORROSION 1998. NACE International, 1998. https://doi.org/10.5006/c1998-98131.

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Abstract Although the subject of irradiation corrosion has been studied for more than 39 years, there is not yet a general theory universally accepted. In this paper, in virtue of the realization of the monovalue ion energy by accelerator, a parameter G, the irradiation corrosion damage efficiency, was defined theoretically. A G-D function, where D is the ion irradiation dose, was established by using zirconium alloy samples bombarded with Zr+ and Ar+ ions respectively and then tested electrochemically in LiOH water solution at high pressure and high temperature, in H2SO4 or H3BO3 water soluti

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O’Neill, Keenan, John Groth, Helena Alves, and Dev Chidambaram. "Evaluating the Corrosion Performance of Materials in Solar Nitrate Salts." In CORROSION 2021. AMPP, 2021. https://doi.org/10.5006/c2021-16570.

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Abstract The corrosion behavior of two alloy samples was analyzed using potentiodynamic polarization in a molten nitrate medium at 500°C. The Tafel region of the polarization curves was extrapolated to calculate the exchange current density and corrosion potential. Gravimetric analysis was also conducted to determine the mass change due to corrosion. The performance of these alloys was approximated using these values to screen these materials for further testing in this environment. The exchange current density was lowest for UNS N06230 at 0.233mA/cm2 and highest for UNS N06625 GR1 at 0.389mA/

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Gundersen, R., B. Johansen, I. Vintermyr, R. Tunold, and G. Hagen. "The Effect of Sodium Hypochlorite on the Electrochemical Properties of Stainless Steels and on the Bacterial Activity in Seawater." In CORROSION 1989. NACE International, 1989. https://doi.org/10.5006/c1989-89108.

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Abstract Stainless steels have been immersed in continuous and intermittent chlorinated seawater, and the effect on electrode potential and bacterial activity has been observed. Time dependent changes in open circuit potential and cathodic polarization curves with or without chlorination, seem to indicate a slow change in the rate of electron transfer across the metal oxide/solution interface during immersion.

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Siebert, Oliver W. "Application of the Rapid-Scan Potentiodynamic Polarization Technique for Corrosion Studies." In CORROSION 1985. NACE International, 1985. https://doi.org/10.5006/c1985-85072.

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Abstract Electrochemical techniques have been used for over three decades to study fundamental phenomenological corrosion reactions of metals in corrosive environments. The two methods used for the generaton of anodic polarization curves for those studies differ by virtue of the rate of change of the applied electrical potential. Neither method is (more) correct to the exclusion of the other; while both techniques provide a commonality of understanding of the electrochemical processes that result in metallic corrosion, each supplies a separate insight into that evaluation. A review of the so-c

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Dobosz, L. M. "Electrochemical Assessment of Corrosion Behavior of 316 Stainless Steel in Sodium Chlorate Solutions." In CORROSION 2012. NACE International, 2012. https://doi.org/10.5006/c2012-01489.

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Abstract Corrosion behavior of 316L stainless steel grade in various chlorate mixtures was tested electrochemically. Following ASTM G 61 standard for conducting cycling potentiodynamic polarization and standard surface preparation, wire coupons were used for experiments. In addition to 316L grade some polarization curves were obtained for 304L stainless steel grade and platinum, to be used as reference points. Influence of chloride, dichromate, perchlorate, hypochlorite, sulfate and hydrogen peroxide at varying pH was studied. The presence of hypochlorite or hydrogen peroxide greatly increases

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Mendez, C., and C. Scott. "Laboratory Evaluation and Modeling of Api-L80/13CR Galvanic Corrosion in CO2 Environment." In CORROSION 2008. NACE International, 2008. https://doi.org/10.5006/c2008-08325.

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Abstract A laboratory evaluation was performed to assess the galvanic coupling corrosion of API L-80 carbon steel coupled with 13Cr in sodium chloride solution at 30 and 80°C and 100 psi of carbon dioxide (CO2). Electrochemical techniques where used (linear polarization and potentiodynamic polarization) with the un-coupled materials. Also the mixed potential and galvanic current change with time were measured after coupling using a zero resistance ammeter (ZRA). Two anode/cathode ratios were used (1:1 and 1:2). Some electrochemical impedance tests were done to determine the electrolyte resista

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Metroke, Tammy L., Olga Kachurina, and Edward T. Knobbe. "Corrosion Resistance Properties of Sub-Micron to Micron-Sized TiO2 Particle-Doped Ormosil Coatings on Aluminum Alloys." In CORROSION 2002. NACE International, 2002. https://doi.org/10.5006/c2002-02138.

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Abstract Organically-modified silicate (Ormosil) films have been found to provide good corrosion resistance for 2024-T3, 6061-T3, and 7075-T6 aluminum alloy substrates. Significant enhancement in corrosion resistance properties of these films were observed upon addition of sub-micron to micron-sized TiO2 particles to the Ormosil coating as determined using accelerated salt spray and electrochemical analysis. Rcorr values derived from potentiodynamic polarization curves were found in the range (147-258) kΩcm2 for doped and non-doped Ormosil thin films. Epit values for doped Ormosil coatings sho

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Звіти організацій з теми "Polarization-change curve"

Thompson. L52114 Efficient use of Cathodic Polarization Criteria. Pipeline Research Council International, Inc. (PRCI), 2005. http://dx.doi.org/10.55274/r0011101.

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A series of long term polarization tests were performed to investigate efficient use of the 100mV polarization growth/decay for demonstrating CP effectiveness. Several conclusions were drawn. Absolute time limits for measuring polarization growth or decay could not be justified. Simple extrapolation of polarization growth or decay curves also could not be justified; future extrapolation needs to be mechanistically based. The application of CP can change the local environment at a steel surface including creating passivity. Redox reactions in soils complicate analysis of polarization data. For

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