PSI - Issue 33

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000 il l li t . i ir t. tructural Integrity rocedia 00 (2019) 000–000

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Procedia Structural Integrity 33 (2021) 933–941

© 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the IGF ExCo Abstract The paper concerns assessment of the durability of a thin-walled elastic pipe subjected to uniform corrosion under internal and/or external pressures of different media with generally different temperatures. Stress-assisted corrosion of thin-walled pipes under pressure was earlier studied by other authors. Being based on the Laplace law, their solutions do not reflect the effect of internal and external pressure values themselves but only the pressure difference. However, as it is known, hydrostatic pressure may affect the corrosion rate. Unlike the solutions based on the Laplace law, we present a solution taking into account the effects of both internal and external pressures (not only their difference), a difference in the elastic stresses through the pipe wall thickness, and thermal stresses. In accordance with available experimental data, the rate of corrosion is supposed to be linearly dependent on the maximal principal stress at the corresponding surface and exponentially dependent on the temperature. Being presented in a closed form, the obtained solution can serve as a benchmark for numerical analysis and for design purposes. © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review Statement: Peer-review under responsibility of the scientific committee of the IGF ExCo Keywords: Mechanochemical corrosion; thermoelasticity; pipe; pressure vessel; lifetime 1. Introduction Pipes are widely used in various fields of human activity (Dastjerdi et al. (2020), Eremeyev et al. (2020), Groysman (2017), Gutman et al. (1984)). Most of them are subjected to joint thermal, mechanical and chemical influences, that may cause the process of so-called mechanochemical corrosion (Pavlov et al. (1987), Gutman (1994)) which is studied in the present paper. This term was introduced by Gutman (1994) for general anodic dissolution of deformed metals to differ from other stress-assisted phenomena of material degradation (e.g., such as str ct e a er c cer s assess e t f t e ra ilit f a t i - alle elastic i e s jecte t if r c rr si er i ter al a / r e ter al ress res f iffere t e ia it e erall iffere t te erat res. tress-assiste c rr si f t i - alle i es er ress re as earlier st ie t er a t rs. ei ase t e a lace la , t eir s l ti s t reflect t e effect f i ter al a e ter al ress re al es t e sel es t l t e ress re iffere ce. e er, as it is , r static ress re a affect t e c rr si rate. li e t e s l ti s ase t e a lace la , e rese t a s l ti ta i i t acc t t e effects f t i ter al a e ter al ress res ( t l t eir iffere ce), a iffere ce i t e elastic stresses t r t e i e all t ic ess, a t er al stresses. I acc r a ce it a aila le e eri e tal ata, t e rate f c rr si is s se t e li earl e e e t t e a i al ri ci al stress at t e c rres i s rface a e e tiall e e e t t e te erat re. ei rese te i a cl se f r , t e tai e s l ti ca ser e as a e c ar f r erical a al sis a f r esi r ses. © 20 1 The Authors. Published by ELSEVIER B.V. This is a e access article under the CC BY-NC-ND license (https://creativecommons.org/lice ses/ - c- / . ) eer-re ie tate e t: eer-re ie er res si ilit f t e scie tific c ittee f t e I ey ords: echanoche ical corrosion; ther oelasticity; pipe; pressure vessel; lifeti e . I t ti i s r i l s i ri s fi l s f ti it ( stj r i t l. ( ), r t l. ( ), r s ( ), t t l. ( )). st f t r s j t t j i t t r l, i l i l i fl s, t t s t r ss f s - ll i l rr si ( l t l. ( ), t ( )) i is st i i t r s t r. is t r s i tr t ( ) f r r l i iss l ti f f r t ls t iff r fr t r str ss- ssist f t ri l r ti ( . ., s s IGF26 - 26th International Conference on Fracture and Structural Integrity A thin-walled pipe exposed to corrosion under pressure and nonuniform heating Evstafeva I.A. a , Pronina Y.G. a * a Saint Petersburg State University, Universitetskaya nab. 7/9, St. Petersburg, 199034, Russia - t I t r ti l f r r t r tr t r l I t rit t . . a , i . . a a Saint etersburg State niversity, niversitetskaya nab. 7/9, St. etersburg, 199034, ussia I

* Corresponding author. E-mail address: y.pronina@spbu.ru * orresponding author. - ail address: y.pronina spbu.ru

2452-3216 © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review Statement: Peer-review under responsibility of the scientific committee of the IGF ExCo 2452-3216 2021 he uthors. ublished by I . . his is an open access article under the - - license (https://creativeco ons.org/licenses/by-nc-nd/4.0) eer-revie tate ent: eer-revie under responsibility of the scientific co ittee of the I x o

2452-3216 © 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the IGF ExCo 10.1016/j.prostr.2021.10.104