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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">zldm</journal-id><journal-title-group><journal-title xml:lang="ru">Заводская лаборатория. Диагностика материалов</journal-title><trans-title-group xml:lang="en"><trans-title>Industrial laboratory. Diagnostics of materials</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1028-6861</issn><issn pub-type="epub">2588-0187</issn><publisher><publisher-name>ООО «Издательство «ТЕСТ-ЗЛ»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26896/1028-6861-2024-90-10-32-38</article-id><article-id custom-type="elpub" pub-id-type="custom">zldm-2311</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>ИССЛЕДОВАНИЕ СТРУКТУРЫ И СВОЙСТВ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>STRUCTURE AND PROPERTIES INVESTIGATION</subject></subj-group></article-categories><title-group><article-title>Оценка влияния гликоля и спирта на морфологию и защитные свойства карбоната железа при углекислотной коррозии газопроводов</article-title><trans-title-group xml:lang="en"><trans-title>Assessment of the influence of glycol and alcohol on the morphology and protective properties of iron carbonate in carbon dioxide corrosion of gas pipelines</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>Вагапов</surname><given-names>Р. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Vagapov</surname><given-names>R. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Руслан Кизитович Вагапов</p><p>142717, Московская обл., г.о. Ленинский, пос. Развилка, ул. Газовиков, зд. 15, стр. 1</p></bio><bio xml:lang="en"><p>Ruslan K. Vagapov</p><p>15, str. 1, ul. Gazovikov, Razvilka, Leninsky, Moscow obl., 142717</p></bio><email xlink:type="simple">R_Vagapov@vniigaz.gazprom.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Газпром ВНИИГАЗ</institution><country>Россия</country></aff><aff xml:lang="en"><institution>LLC Gazprom VNIIGAZ</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>22</day><month>10</month><year>2024</year></pub-date><volume>90</volume><issue>10</issue><fpage>32</fpage><lpage>38</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Вагапов Р.К., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Вагапов Р.К.</copyright-holder><copyright-holder xml:lang="en">Vagapov R.K.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" 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.zldm.ru/jour/article/view/2311">https://www.zldm.ru/jour/article/view/2311</self-uri><abstract><p>Потенциальное влияние ингибиторов гидратообразования (гликолей, спиртов) — компонентов жидкой фазы эксплуатационных сред газопроводов — на углекислотную коррозию при транспорте агрессивного газа недостаточно изучено. В работе представлены результаты исследования коррозионного воздействия глиголя (спирта), присутствующего в жидкой фазе, на состав и свойства продуктов коррозии на стали при моделировании основных агрессивных факторов в условиях транспорта CO2-содержащего газа. На коррозионном стенде воспроизводили агрессивные условия переменного смачивания водой стенок газопровода. Циркуляция жидкости, характерная для частично заполненного трубопровода, может влиять на предотвращение формирования или разрушение пленок продуктов коррозии (карбоната железа, сидерита) на стальной поверхности. В местах растрескивания и отслоения сидерита, образующегося в присутствии CO2, будут формироваться условия для образования общих и локальных коррозионных повреждений. При имитационных испытаниях использовали моноэтиленгликоль и изопропанол, а также их водные растворы разной концентрации. Впервые получены данные по образованию и составу нестехиометрического сидерита в водно-гликолевых и водно-спиртовых средах при различных парциальных давлениях CO2 и температуре. С помощью обработки дифрактограмм, полученных методом рентгеновской дифракции, определена степень замещения ионов железа в нестехиометрических сидеритах другими катионами. Проанализирована зависимость степени замещения от концентрации спирта (гликоля) в их водных растворах. Выявлено, что с увеличением концентрации гликоля наблюдается снижение скорости локальной коррозии. При высоком содержании гликоля происходит полное подавление внутренней коррозии в присутствии CO2. Установлено, что в водно-спиртовых средах при повышенной температуре локальная углекислотная коррозия не протекает. Это, видимо, связано с неравномерным распределением воды и спирта в смеси. Полученные результаты могут быть использованы при оценке внутренней углекислотной коррозии в присутствии гликоля (спирта), применяемого на газовых объектах в качестве ингибитора гидратообразования.</p></abstract><trans-abstract xml:lang="en"><p>The potential effect of hydrate formation inhibitors (glycols, alcohols) — components of the liquid phase of gas pipeline operating media — on carbon dioxide corrosion during the transport of aggressive gas has not been sufficiently studied. The paper presents the results of a study of the corrosive effect of glycol (alcohol) present in the liquid phase on the composition and properties of corrosion products on steel when modeling the main aggressive factors under conditions of transport of CO2-containing gas. On a corrosion stand, the aggressive conditions of alternating wetting of gas pipeline walls with water were reproduced. The fluid circulation characteristic of a partially filled pipeline can have an effect on preventing the formation or destruction of films of corrosion products (iron carbonate, siderite) on the steel surface. In places of cracking and peeling of siderite formed in the presence of CO2, conditions will be created for the formation of general and local corrosion damage. During simulation tests, monoethylene glycol and isopropanol, as well as their aqueous solutions of different concentrations, were used. For the first time, data on the formation and composition of non-stoichiometric siderite in water-glycol and water-alcohol media at CO2 partial pressures and temperature were obtained. By processing diffraction patterns obtained by X-ray diffraction, the degree of substitution of iron ions in non-stoichiometric siderites by other cations was determined. The dependence of the degree of substitution on the concentration of alcohol (glycol) in their aqueous solutions was analyzed. It was revealed that with an increase in glycol concentration, a decrease in the rate of local corrosion is observed. With a high glycol content, internal corrosion is completely suppressed in the presence of CO2. It has been established that in aqueous-alcoholic media at elevated temperatures, local carbon dioxide corrosion does not occur. This is apparently due to the uneven distribution of water and alcohol in the mixture. The results obtained can be used in assessing internal carbon dioxide corrosion in the presence of glycol (alcohol), used at gas facilities as an inhibitor of hydrate formation.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>диоксид углерода</kwd><kwd>локальная коррозия</kwd><kwd>переменное смачивание</kwd><kwd>продукты коррозии</kwd><kwd>метод рентгеновской дифракции</kwd><kwd>нестехиометрический сидерит</kwd><kwd>изоморфное замещение</kwd><kwd>эффект Марангони</kwd></kwd-group><kwd-group xml:lang="en"><kwd>carbon dioxide</kwd><kwd>local corrosion</kwd><kwd>variable wetting</kwd><kwd>corrosion products</kwd><kwd>X-ray diffraction method</kwd><kwd>non-stoichiometric siderite</kwd><kwd>isomorphic substitution</kwd><kwd>Marangoni effect</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа финансировалась за счет средств бюджета института (учреждения, организации). Дополнительные гранты на проведение или руководство данным исследованием не привлекались.</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">Слугин П. П., Ягафаров И. Р., Кантюков Р. Р. и др. Научный анализ технического состояния и защиты скважинного оборудования и промысловых трубопроводов ПАО «Газпром» в условиях добычи и транспортировки коррозионно-агрессивного газа. Ч. 1 / Газовая промышленность. 2023. Т. 854. № 9. С. 64 – 71.</mixed-citation><mixed-citation xml:lang="en">Slugin P. P., Yagafarov I. R., Kantyukov R. R., et al. Scientific analysis of the technical status and protection of well equipment and field pipelines of PJSC Gazprom under conditions of corrosive gas production and transportation. Part 1 / Gas Industry of Russia. 2023. Vol. 854. N 9. 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