Abstract
The article presents information on local structural nonuniformities in the tube wall metal due to which its individual zones have different susceptibility to corrosion damage processes. The presented information is based on experimental data about the structure of material (microhardness, crystallite size distribution function, and inner structural stresses of the first and second kind depending on the structural flaws density and temperature) obtained using the high-temperature X-radiography method. For a sample made of Grade 20 steel, the temperature range (350–370°C) is experimentally substantiated and determined based on the conditions of relaxing inner structural stresses of the first and second kind in which the crack surface is passivated by oxide film, which prevents the occurrence of stress concentration at the crack edge and crack propagation.
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References
Yu. V. Balaban-Irmenin, “Factors causing the occurrence of pits on carbon steel under heat network conditions,” Novosti Teplosnab., No. 4, 49–52 (2011).
Yu. N. Antipov, I. A. Shumakova, S. Yu. Platonov, V. A. Maslyanitsyn, I. G. Rodionova, and O. N. Baklanova, “Specific features pertinent to corrosion of petroleum pipelines under the conditions of their longterm operation in media containing H2S and CO2,” Korroziya Territ. Neftegaz, No. 3, 42–46 (2010).
Yu. V. Balaban-Irmenin, V. M. Lipovskikh, and A. M. Rubashov, Protection of Water Heat Network Pipelines from Internal Corrosion (Energoatomizdat, Moscow, 2008) [in Russian].
A. A. Sharapov, I. G. Rodionova, O. N. Baklanova, V. M. Lipovskikh, V. F. Rezinskikh, Yu. V. BalabanIrmenin, A. M. Rubashov, V. I. Gladshtein, A. V. Pchelintsev, S. D. Zinchenko, S. V. Efimov, A. V. Golovanov, D. N. Garbuz, P. P. Stepanov, and A. A. Bat’kov, “Improving the corrosion resistance of steels used for making heat network pipes by achieving the required purity in regard of corrosion-active inclusions,” Novosti Teplosnab., No. 9, 41–45 (2005).
L. L. Lyubimova, A. S. Zavorin, and B. V. Lebedev, Principles of Using the High-Temperature X-Radiography Method for Estimating the Serviceability of Steam Boiler Pipes (STT, Tomsk, 2009) [in Russian].
V. N. Selivanov and E. F. Smyslov, “An analysis of polydispersity in approximating an X-ray diffraction profile by the Voigt function,” Zavodsk. Lab., No. 7, 28–29 (1991).
V. N. Selivanov and E. F. Smyslov, “A simple method for calculating the distributions of microdeformations and sizes of crystallites in analyzing the broadening of X-ray line profiles,” Zavodsk, Lab., No. 6, 36–38 (1993).
Yu. M. Brodov, R. S. Reznikova, G. I. Krasnova, and A. I. Chaika, “An analysis of indicators characterizing the reliability of heat exchangers used at thermal power stations,” Energomashinostr., No. 11, 35–39 (1992).
G. V. Vasilenko, G. P. Sutotskii, and A. P. Loshitskii, “Corrosion of the delivery-water heater tube system,” Therm. Eng. 39(2) (1992).
A. F. Bogachev, “Studying and preventing metal corrosion of power installations in phase transformation zones,” Therm. Eng. 41(8) (1994).
A. B. Vainman, O. I. Martynova, I. A. Malakhov, E. G. Amosova, and B. F. Ivin, “A study of the corrosive-mechanical damage to the tubes of the horizontal district heat exchangers of T-250/300-240 turbines,” Therm. Eng. 44(6), 446 (1997).
V. S. Ivanova, Achievements of the Russian Physical Metallurgy (Metallurgiya, Moscow, 1979) [in Russian].
L. L. Lyubimova, A. A. Tashlykov, A. A. Makeev, A. S. Zavorin, I. A. Artamomtsev, and B. V. Lebedev, “Variation of inner stresses in boiler tube sections under plastic deformation,” Izv. Tomsk Polytechn. Univ. 309(6), 114–119 (2006).
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Original Russian Text © L.L. Lyubimova, A.A. Makeev, A.S. Zavorin, A.A. Tashlykov, A.I. Artamontsev, B.V. Lebedev, R.N. Fisenko, 2014, published in Teploenergetika.
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Lyubimova, L.L., Makeev, A.A., Zavorin, A.S. et al. Consideration of intrastructural stresses in the processes connected with the effect of structural nonuniformity on corrosion damages inflicted to heat-transfer tubes. Therm. Eng. 61, 600–605 (2014). https://doi.org/10.1134/S0040601514060068
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DOI: https://doi.org/10.1134/S0040601514060068