Evaluation of the intergranular corrosion susceptibility of UNS S31803 duplex stainless steel with thermoelectric power measurements |
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| Affiliation: | 1. Instituto de Investigaciones Metalúrgicas, Universidad Michoacana de San Nicolás de Hidalgo, A.P. 888, CP 58000, Morelia, Michoacán, Mexico;2. Universidad Autónoma de Nuevo León (UANL), Facultad de Ingeniería Mecánica y Eléctrica (FIME), Centro de Investigación e Innovación en Ingeniería Aeronáutica (CIIIA), Aeropuerto Internacional del Norte, Carr. Salinas Victoria Km. 23, Apodaca, N.L., Mexico;1. Beijing Key Laboratory of Failure, Corrosion and Protection of Oil/Gas Facility Materials, Department of Materials Science and Engineering, China University of Petroleum (Beijing), Beijing 102249, China;2. State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi''an, Shaanxi 710072, China;3. School of Mechanical and Chemical Engineering, The University of Western Australia, Crawley, WA 6009, Australia;4. Baoshan Iron & Steel Co., Ltd., Shanghai 201900, China;1. Department of Aerospace Engineering, Iowa State University, Ames, IA, 50011, United States;2. Department of Mechanical Engineering, Iowa State University, Ames, IA, 50011, United States;3. Department of Chemical and Biological Engineering, Iowa State University, Ames, IA, 50011, United States;1. Joining and Welding Research Institute, Osaka University, Japan;2. Nuclear Science and Engineering Center, Japan Atomic Energy Agency, Japan;1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, 230031, China;2. University of Science and Technology of China, Hefei, 230026, China;3. State Key Laboratory of Technologies in Space Cryogenic Propellants, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100190, China;4. National Defense Key Discipline Laboratory of Light Alloy Processing Science and Technology, Nanchang Hangkong University, Nanchang, 330063, China |
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| Abstract: | In this study, the use of thermoelectric power (TEP) measurements as a nondestructive method for the determination of the degree of sensitization (DOS) in UNS S31803 duplex stainless steel (DSS) is presented. Samples were aged for times up to 240 h and subjected to the double loop electrochemical potentiokinetic reactivation (DL-EPR) test to calculate the DOS induced. The correlation between TEP and the DOS evaluated by the DL-EPR method indicates that the TEP coefficient is sensitive to gradual microstructural changes produced by thermal aging and may be used to monitor the susceptibility to intergranular corrosion in UNS S31803 DSS. |
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