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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">cpomaem</journal-id><journal-title-group><journal-title xml:lang="ru">Коррозия: защита материалов и методы исследований</journal-title><trans-title-group xml:lang="en"><trans-title>Title in english</trans-title></trans-title-group></journal-title-group><publisher><publisher-name>ИФХЭ РАН</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.61852/2949-3412-2026-4-1-19-46</article-id><article-id custom-type="elpub" pub-id-type="custom">cpomaem-132</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Статьи</subject></subj-group></article-categories><title-group><article-title>Коррозионное растрескивание под напряжением трубных сталей: влияние состава среды и возможности ингибирования</article-title><trans-title-group xml:lang="en"><trans-title>Stress Corrosion Cracking of Pipe Steels: Effect of Environment Composition and Inhibition Possibilities</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Петрунин</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Petrunin</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>119071,г. Москва, Ленинский проспект, д. 31, корп.4</p></bio><bio xml:lang="en"><p>31-4, Leninsky prospect, 119071 Moscow</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Игнатенко</surname><given-names>В. Э.</given-names></name><name name-style="western" xml:lang="en"><surname>Ignatenko</surname><given-names>V. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>119071,г. Москва, Ленинский проспект, д. 31, корп.4</p></bio><bio xml:lang="en"><p>31-4, Leninsky prospect, 119071 Moscow</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Максаева</surname><given-names>Л. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Maksaeva</surname><given-names>L. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>119071,г. Москва, Ленинский проспект, д. 31, корп.4</p></bio><bio xml:lang="en"><p>31-4, Leninsky prospect, 119071 Moscow</p></bio><email xlink:type="simple">lmaksaeva@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Рыбкина</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Rybkina</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>119071,г. Москва, Ленинский проспект, д. 31, корп.4</p></bio><bio xml:lang="en"><p>31-4, Leninsky prospect, 119071 Moscow</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Юрасова</surname><given-names>Т. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Yurasova</surname><given-names>T. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>119071,г. Москва, Ленинский проспект, д. 31, корп.4</p></bio><bio xml:lang="en"><p>31-4, Leninsky prospect, 119071 Moscow</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Федеральное государственное бюджетное учреждение науки Институт физической химии и электрохимии им. А.Н. Фрумкина Российской академии наук<country>Россия</country></aff><aff xml:lang="en">Frumkin Institute of Physical Chemistry and Electrochemistry Russian Academy of Sciences<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>09</day><month>04</month><year>2026</year></pub-date><volume>0</volume><issue>1</issue><fpage>19</fpage><lpage>46</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Петрунин М.А., Игнатенко В.Э., Максаева Л.Б., Рыбкина А.А., Юрасова Т.А., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Петрунин М.А., Игнатенко В.Э., Максаева Л.Б., Рыбкина А.А., Юрасова Т.А.</copyright-holder><copyright-holder xml:lang="en">Petrunin M.A., Ignatenko V.E., Maksaeva L.B., Rybkina A.A., Yurasova T.A.</copyright-holder><license license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.cpmrm.ru/jour/article/view/132">https://www.cpmrm.ru/jour/article/view/132</self-uri><abstract><p>В статье исследовано коррозионное растрескивание под напряжением (КРН) трубной стали класса прочности Х70 в условиях, моделирующих подземную эксплуатацию магистральных газопроводов. Коррозионно-механические испытания проведены на образцах, вырезанных из труб методом циклического четырёхточечного изгиба (максимальные напряжения близки к пределу текучести), в электролитах с различной наводороживающей способностью. В качестве модельной около нейтральной среды применяли раствор NS4, имитирующий электролит под отслоившимся изоляционным покрытием, и цитратный буфер с pH 5,5. Степень наводороживания усиливали добавкой промотора наводороживания (тиомочевины) и варьированием потенциала. Показано, что микротрещины зарождаются на дне концентраторов напряжений (питтингов) и затем выходят на основную поверхность, формируя узкие трещины с большим аспектным отношением. Коррозионная среда сокращает инкубационный период трещинообразования примерно вдвое по сравнению с воздухом, при этом время зарождения трещины определяется размером и формой концентратора: естественные питтинги диаметром порядка сотен микрометров способствуют возникновению трещины за 24÷28 суток, тогда как искусственно сделанные отверстия 0,6–1 мм инициируют трещины за 5÷7 суток. На основе измерений проницаемости водорода (электрохимическая десорбция) оценены диапазоны концентраций водорода в приповерхностном слое, при которых влияние водорода на инициирование КРН становится заметным. При умеренном наводороживании зарождение трещин почти не ускоряется, тогда как при повышенной концентрации водорода в стали инкубационный период зарождения трещины резко сокращается. Отдельно изучены возможности ингибирования КРН кремнийорганическими (органосилановыми) пленками, сформированными на поверхности трубной стали при её модификации растворами композиций на основе органосиланов (винил- и аминосиланы) растворами смесей: органосилан+ органический ингибитор коррозии (1,2,3-бензотриазол (БТА), катамин АБ). Показано максимальное увеличение времени до зарождения (инкубационного периода) трещины, снижение скорости её роста достигается при использовании наиболее эффективной композиции винилсилан+ бензотриазол. Для незащищённой стали трещина от отверстия 1 мм появлялась через 5 суток, тогда как в присутствии поверхностного слоя [ВС+ БТА] – через 36 суток, снижая, кроме этого скорость роста трещины на начальном этапе её развития. Результаты могут быть полезны для повышения надёжности подземных трубопроводов и совершенствования наземных методов коррозионной диагностики подземных сооружений.</p></abstract><trans-abstract xml:lang="en"><p>The paper investigates stress corrosion cracking (SCC) of X70-grade pipe steel under conditions simulating the underground service of main gas pipelines. Corrosion-mechanical tests were performed on specimens cut from pipes by cyclic four-point bending (maximum stresses were close to the yield strength) in electrolytes with different capacities to promote hydrogen uptake. NS4 solution, simulating the electrolyte beneath a disbonded coating, and a citrate buffer at pH 5.5 were used as model near-neutral media. The degree of hydrogen charging was increased by adding a hydrogen-uptake promoter (thiourea) and by varying the potential. It is shown that microcracks initiate at the bottom of stress concentrators (pits) and then emerge on the specimen surface, forming narrow cracks with a high aspect ratio. The corrosive medium shortens the incubation period of crack formation by approximately a factor of two compared with air, while the time to crack initiation is determined by the size and shape of the concentrator: natural pits with diameters on the order of hundreds of micrometres promote crack formation within 24 – 28 days, whereas artificially produced holes 0.6– 1 mm in diameter initiate cracks within 5 – 7 days. Based on hydrogen permeability measurements (electrochemical desorption), ranges of hydrogen concentration in the near-surface layer were estimated in which the effect of hydrogen on SCC initiation becomes noticeable. Under moderate hydrogen charging, crack initiation is hardly accelerated, whereas at elevated hydrogen concentrations in the steel the crack-initiation incubation period decreases sharply. The possibilities of inhibiting SCC by organosilicon (organosilane) films formed on the surface of pipe steel during its modification with solutions of organosilane-based compositions (vinyl- and aminosilanes) and with solutions of mixtures of organosilane + organic corrosion inhibitor (benzotriazole (BTA), Catamine AB) were also studied. The greatest increase in the time to crack initiation (incubation period), together with a decrease in crack growth rate, was achieved using the most effective composition, vinylsilane + benzotriazole. For unprotected steel, a crack emanating from a 1 mm hole appeared after 5 days, whereas in the presence of the surface layer [VS + BTA] it appeared after 36 days; in addition, the crack growth rate at the initial stage of crack development was reduced. The results may be useful for improving the reliability of underground pipelines and for advancing above-ground methods of corrosion diagnostics for underground structures.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>коррозионно-механические испытания</kwd><kwd>коррозионное растрескивание под напряжением</kwd><kwd>органосиланы</kwd><kwd>силоксановые поверхностные слои ингибирование коррозии</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Corrosion-mechanical testing</kwd><kwd>stress corrosion cracking</kwd><kwd>organosilanes</kwd><kwd>siloxane surface layers</kwd><kwd>corrosion inhibition</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>Работа выполнена при финансовой поддержке Министерства науки и высшего образования Российской Федерации.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">R. Amaya–Gómez, M. Sánchez–Silva, E. 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