nucВестник НЯЦ РКNNC RK Bulletin1729-75161729-7885Национальный ядерный центр Республики Казахстан10.52676/1729-7885-2024-3-35-43nuc-678Research ArticleСтатьиВЛИЯНИЕ ХИМИЧЕСКОГО СОСТАВА И ТЕРМИЧЕСКОЙ ОБРАБОТКИ НА СТОЙКОСТЬ К ПИТИНГОВОЙ КОРРОЗИИ ОБЛУЧЕННОЙ НЕЙТРОНАМИ СТАЛИ AISI 316 LNINFLUENCE OF CHEMICAL COMPOSITION AND HEAT TREATMENT ON PITTING CORROSION RESISTANCE OF NEUTRON-IRRADIATED AISI 316 LN STEELhttps://orcid.org/0000-0002-5885-6464МережкоД. А.MerezhkoD. A.

Алматы

Almaty

diana@inp.kzhttps://orcid.org/0000-0003-1948-3367ТакиеваА. М.TakiyevaA. M.

Алматы

Almaty

takijeva@inp.kzhttps://orcid.org/0000-0002-8727-4404МережкоМ. С.MerezhkoM. S.

Алматы

Almaty

merezhko@inp.kzРГП «Институт ядерной физики» МЭ РККазахстанRSE “Institute of Nuclear Physics” ME RKKazakhstan202430092024033543Copyright © Мережко Д.А., Такиева А.М., Мережко М.С., 20242024Мережко Д.А., Такиева А.М., Мережко М.С.Merezhko D.A., Takiyeva A.M., Merezhko M.S.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://journals.nnc.kz/jour/article/view/678

В данной работе было исследовано влияние легирующих элементов (азота, марганца, меди и вольфрама), и нейтронного облучения в реакторе ВВР-К до максимального флюенса 2·1020 н/см2 на стойкость к питтинговой коррозии аустенитной стали AISI 316 LN, подвергнутой провоцирующим нагревам при температурах в диапазоне 500–800 ℃. Установлено, что легирование азотом и марганцем значительно улучшает коррозионные свойства стали AISI 316 LN, а добавление меди и вольфрама снижает стойкость к питтинговой коррозии. Показано, что провоцирующие нагревы при температурах от 500 до 800 ℃ с интервалом 100 ℃ ухудшают коррозионную стойкость сталей в необлученном состоянии в следствие образования нитридов и карбидов хрома, а добавление меди уменьшает степень сенсибилизации. Согласно полученным результатам установлено, что облучение нейтронами до максимального флюенса 2·1020 н/см2 исследуемых сталей после холодной прокатки и не подвергавшихся провоцирующим нагревам привело к уменьшению скорости коррозии. Провоцирующие нагревы при температурах 700-800 ℃ облученных нейтронами образцов сталей 211 L-213 L привели к увеличению скорости коррозии в особенности в сталях, легированных медью. Нейтронное облучение в значительной степени усиливает эффект сенсибилизации.

In this work, the influence of alloying elements (nitrogen, manganese, copper, and tungsten) and neutron irradiation in the VVR-K reactor up to a maximum fluence of 2·1020 n/cm2 on the resistance to pitting corrosion of austenitic steel AISI 316 LN, subjected to provoking heating at temperatures in the range of 500-800 °C. It has been established that alloying with nitrogen and manganese significantly improves the corrosion properties of AISI 316 LN steel, and the addition of copper and tungsten reduces the resistance to pitting corrosion. It has been shown that provoking heating at temperatures from 500 to 800 °C with an interval of 100 °C worsens the corrosion resistance of steels in a non-irradiated state due to the formation of chromium nitrides and carbides, and the addition of copper reduces the degree of sensitization. According to the results obtained, it was established that neutron irradiation to a maximum fluence of 2·1020 n/cm2 of the studied steels after cold rolling and not subjected to provoking heating led to a decrease in the corrosion rate. Provoking heating at temperatures of 700–800 °C of neutron-irradiated samples of steels 211 L-213 L led to an increase in the corrosion rate, especially in steels alloyed with copper. Neutron irradiation greatly enhances the sensitization effect.

азотистые сталинейтронное облучениелегированиесенситизацияпиттинговая коррозияnitrogen steelsneutron irradiationalloyingsensitizationpitting corrosionРабота выполнена в рамках реализации ПЦФ по теме ИРН BR21881930 «Реакторные исследования, направленные на обеспечение безопасной и эффективной эксплуатации перспективных ядерных и термоядерных энергетических установок». Авторы выражают благодарность доктору J.T. Busby (ORNL, USA) и доктору M.N. Gussev (ORNL, USA) за предоставление для работы новых высокоазотистых сталей.ReferencesNingshen S., Kamachi U., Mudali V.K., Mittal, H.S. Khatak Semiconducting and passive film properties of nitrogencontaining type 316LN stainless steels // Corrosion Science. – 2007. –Vol. 49. – No 2.– P. 481–496. https://doi.org/10.1016/j.corsci.2006.05.041Ningshen S., Kamachi U., Mudali V.K., Mittal, H.S. 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The authors declare that there are no conflicts of interest present.