Academic literature on the topic 'Tafel extrapolation'

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Journal articles on the topic "Tafel extrapolation"

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Esteves, Luiza, Mônica M. A. M. Schvartzman, Wagner Reis da Costa Campos, and Vanessa F. C. Lins. "Corrosion Behavior of Duplex Stainless Steel in Industrial White Liquor." Corrosion 74, no. 5 (2017): 543–50. http://dx.doi.org/10.5006/2558.

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Specimens of lean duplex and duplex stainless steel were exposed at 200°C in industrial white liquor from a Brazilian kraft mill using an autoclave to simulate the same conditions of digester processing. Tafel extrapolation method and weight loss were used to evaluate corrosion behavior of duplex steel in white liquor. The higher alloy steel, although presenting a lower corrosion rate than the lean duplex, presents a more severe selective attack on ferrite, at 200°C and 1.8 MPa, after Tafel extrapolation method in industrial white liquor.
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McCafferty, E. "Validation of corrosion rates measured by the Tafel extrapolation method." Corrosion Science 47, no. 12 (2005): 3202–15. http://dx.doi.org/10.1016/j.corsci.2005.05.046.

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Poorqasemi, E., O. Abootalebi, M. Peikari, and F. Haqdar. "Investigating accuracy of the Tafel extrapolation method in HCl solutions." Corrosion Science 51, no. 5 (2009): 1043–54. http://dx.doi.org/10.1016/j.corsci.2009.03.001.

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Sharma, Sangita, Kinnari H. Parikh, Mahesh V. Kadia, Falguni D. Thakkar, and Dhara D. Patel. "Polarization Studies on Inhibitory Effect of Chromates and Dichromates on Corrosion of Tin Coated Steel in 0.5M Monochloroacetic Acid." E-Journal of Chemistry 5, no. 2 (2008): 302–8. http://dx.doi.org/10.1155/2008/658706.

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Chromates and Dichromates have been tested for its inhibitory effects towards tin coated steel in 0.5M monochloroacetic acid. The corrosion behaviour of potassium chromate, sodium chromate, potassium dichromate, sodium dichromate and ammonium dichromate was studied by polarization curves, Tafel parameters like Tafel slopes, extrapolation of cathodic Tafel line and intersection of cathodic and anodic line at open circuit potential in presence of inhibitors have been tabulated along with other electrochemical parameters and corrosion current have been calculated from Tafel lines. The efficiencies are calculated and compared reasonably well with those obtained from loss in weight data. All the inhibitors induce a significant increase of potential positive and direction accounts for cathodic polarization. The Icorrhas also been calculated and that accounts well for cathodic reactions in presence of chromates and dichromates as inhibitors.
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Shi, Zhiming, Ming Liu, and Andrej Atrens. "Measurement of the corrosion rate of magnesium alloys using Tafel extrapolation." Corrosion Science 52, no. 2 (2010): 579–88. http://dx.doi.org/10.1016/j.corsci.2009.10.016.

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Rybalka, K. V., L. A. Beketaeva, and A. D. Davydov. "Estimation of Corrosion Rate of AISI 1016 Steel by the Analysis of Polarization Curves and Using the Method of Measuring Ohmic Resistance." Russian Journal of Electrochemistry 57, no. 1 (2021): 16–21. http://dx.doi.org/10.1134/s1023193521010092.

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Abstract By the example of the study of AISI 1016 steel corrosion in the HCl solution, the potentialities of various methods for determining the corrosion currents are studied. The corrosion rate of steel without polarization is determined using the method of measuring ohmic resistance of test specimen. It is shown that the iterative method used for the analysis of potentiodynamic curves in the vicinity of corrosion potential avoids the complications that arise when the Tafel extrapolation method is used in the absence of pronounced Tafel sections in these curves.
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Amin, M. A., O. A. Hazzazi, F. Kandemirli, and M. Saracoglu. "Inhibition Performance and Adsorptive Behavior of Three Amino Acids on Cold-Rolled Steel in 1.0 M HCl—Chemical, Electrochemical, and Morphological Studies." Corrosion 68, no. 8 (2012): 688–98. http://dx.doi.org/10.5006/0506.

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Three selected amino acids, namely, serine (Ser), threonine (Thr), and glutamine (Glu), were tested as corrosion inhibitors for cold-rolled steel (CRS) in 1.0 M hydrochloric acid (HCl) solutions at different temperatures (283 K to 333 K). Chemical (weight loss) and electrochemical (Tafel polarization) methods were used in this study. Electrochemical frequency modulation (EFM), a non-destructive corrosion measurement technique that can directly give values of corrosion current without prior knowledge of Tafel constants, was also used. Experimental corrosion rates determined by the Tafel extrapolation method were compared with those obtained using the EFM technique and the weight-loss method. Morphologies of the corroded and the inhibited surfaces were studied by means of atomic force microscopy (AFM) and scanning electron microscopy (SEM). Tafel plots showed that the three tested amino acids act as mixed-type inhibitors. The three tested amino acids appeared to function through adsorption following the Temkin adsorption isotherm model. Glu was found to inhibit corrosion of steel more effectively than Ser and Thr.
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Bakhtiari, Amirreza. "The relationship between surface treatments and corrosion resistance of hot-dip galvanized steel." Metallurgical and Materials Engineering 20, no. 3 (2014): 165–70. http://dx.doi.org/10.5937/metmateng1403165b.

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In this work three surface treatments such as: polishing, sand-blast and polishedoxidized have been carried out on the hot-dip galvanized coatings. The roughness and corrosion resistance of coatings have been studied. Surface morphology of coatings has evaluated by scanning electron microscope (SEM). Corrosion behavior was analyzed by salt spray cabinet test and Tafel extrapolation test. The results showed that the sample under sand-blasted treatment exhibited the highest roughness number. Tafel polarization and salt spray cabinet tests reveal the sample with great roughness number have weak corrosion resistance. Difference observed in corrosion behaviour can be explained by difference in surface roughness.
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Poorqasemi, Eqbal, Fatemeh Haqdar, and Omid Abootalebi. "A Study on the Accuracy of the Tafel Extrapolation Method in HCl." ECS Transactions 19, no. 29 (2019): 191–203. http://dx.doi.org/10.1149/1.3259809.

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Xu, Yang, Yong Zou, and Tao Luan. "Application of Electrochemical Techniques in the Porosity Assessment of Electroless Coatings." Advanced Materials Research 557-559 (July 2012): 1848–51. http://dx.doi.org/10.4028/www.scientific.net/amr.557-559.1848.

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Chemical and electrochemical techniques were applied to evaluate the porosity of various electroless coatings (single-layer coating, multilayer coating and ternary coating). The electrochemical techniques include linear polarization resistance and Tafel extrapolation method. The effects of these techniques were compared. It’s evident that electrochemical methods performed better than chemical method when they were applied to assess the porosities of coatings with very fine through pores.
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Dissertations / Theses on the topic "Tafel extrapolation"

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Beserra, Antonio Adelmo Freire. "Analise da resistencia a corrosão do aço carbono revestido com Al55-Zn apos deformação mecanica e tratamento termico." [s.n.], 2001. http://repositorio.unicamp.br/jspui/handle/REPOSIP/263616.

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Orientador: Celia Marina de A. Freire<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Mecanica<br>Made available in DSpace on 2018-07-29T00:11:40Z (GMT). No. of bitstreams: 1 Beserra_AntonioAdelmoFreire_D.pdf: 6476925 bytes, checksum: 51577bdfab4d41fd0bb2c35bf250bfc2 (MD5) Previous issue date: 2001<br>Resumo: O revestimento de Al55-Zn apresenta uma resistência à corrosão atmosférica em média doze vezes superior à do revestimento galvanizado. Entretanto, após deformação mecânica, o revestimento de Al55-Zn apresenta microtrincas que comprometem a sua resistência à corrosão. Neste trabalho estudou-se a variação na resistência à corrosão do revestimento de Al55-Zn após deformação sob tração ou dobramento e a influência de tratamentos térmicos a '200 GRAUS' e a '360 GRAUS' durante 16h na resistência à corrosão do revestimento antes e depois das deformações. Para isso, um grupo de amostras do material foi deformado sob tensão de tração até 10% ou 15% de seu comprimento inicial e outro grupo foi dobrado até '90 GRAUS' ou '180 GRAUS'. A variação na resistência à corrosão do revestimento foi analisada através das técnicas de extrapolação de Tafel e de espectroscopia de impedância eletroquímica. Como resultado, observou-se que tanto a deformação axial quanto o dobramento do material reduzem a sua resistência à corrosão. Após o tratamento térmico a '360 GRAUS' as amostras deformadas até 10% ou 15% recuperaram a sua resistência à corrosão, entretanto, as amostras dobradas até '90 GRAUS' ou '180 GRAUS' apresentaram apenas uma recuperação parcial na sua resistência à corrosão após os tratamentos térmicos<br>Abstract: The atmospheric corrosion resistance of 55%Al-Zn alloy coating on average is twelve times that of an equal thickness of galvanized coating. However, it has been shown that microcracks were observed at all levels of strain under simple uniaxial tension. Our research has been focused on determining the degree of corrosion experienced by these coatings after deformation under simple tension or bending and how much the heat treatment at '200 DEGREES' or '360 DEGREES' for 16h can influence the corrosion resistance of the coating. The coated sheet samples were strained to 10% or 15% engineering strain while another group of samples was bent to bend angles of '90 DEGREES' or '180 DEGREES'. The corrosion resistance of the samples was evaluated trhough Tafel extrapolation and electrochemical impedance spectroscopy methods. As a result, it was observed that both the straining and the bending of the coating reduces its corrosion resistance. After the heat treatment at '360 DEGREES' the samples strained to 10% or 15% recover their corrosion resistance, but the specimens bended to '90 DEGREES' or '180 DEGREES' recuperate only partially the corrosion resistance after the heat treatments<br>Doutorado<br>Materiais e Processos de Fabricação<br>Doutor em Engenharia Mecânica
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Gazzotti, Giulia. "Corrosion resistance of aluminium alloys for civil and industrial applications." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.

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Considering the long service life which is normally expected for buildings, the maintenance cost, the quality and durability of construction materials are strongly affected by triggering of spontaneous degradation processes. As regards specifically metallic materials, awareness of their corrosion behaviour in service condition, in every environment they can get in contact during life, is essential, for maintenance and cleaning operations as well. Corrosion rate measurements can be obtained from electrochemical tests. Corrosion mechanism of metallic alloy is a spontaneous phenomenon, but some factors, as alloying elements, microstructure, surface treatments and environments, may enhance this degradation process. This thesis focuses on understanding corrosion behaviour of three aluminium alloys, Al5083, Al6082 and Al7075, with different surface treatments, tested in two aqueous solutions at different pH conditions (one environment simulating a cleaning detergent and the second environment simulating a strong alkaline solution). The corrosion rate was obtained from corrosion current densities, measured by electrochemical laboratory tests. Results, in terms of Open-Circuit Potential (OCP) and potentiodynamic measurements are reported and discussed. Lastly, SEM and EDX analysis have been used as characterization techniques for microstructure analysis.
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Conference papers on the topic "Tafel extrapolation"

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Kim, Jisoo, and Hyung Wook Park. "The Large Pulsed Electron Beam (LPEB)-Assisted Hybrid Deburring Process of the Patterned Metal Masks." In ASME 2015 International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/msec2015-9233.

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Burrs on the patterned metal mask could degrade the quality of pixels on the semiconductor devices during a vacuum deposition process. In this study, deburring process on the patterned metal mask was performed using abrasive deburring, pulsed electron beam irradiation, and hybrid deburring process combining abrasive deburring and electron beam irradiation. The most widely used material for the metal mask, AISI 304 stainless steel, was patterned by fiber-laser cutting. The performance of each deburring method was evaluated measuring sizes of burrs remained after processing. Surface textures were also observed by white-interferometer. Electrochemical analysis on the bare, fiber-laser cut, and LEPB-treated surface was performed to evaluate a corrosion resistance. Based on the potentiodynamic polarization test, corrosion rate and polarization resistance on the surface was calculated using Tafel extrapolation.
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