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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">10.1234/2949-3412-2023-1-4-151-165</article-id><article-id custom-type="elpub" pub-id-type="custom">cpomaem-35</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>Коррозия меди в растворах лимонной кислоты</article-title><trans-title-group xml:lang="en"><trans-title>Corrosion of copper in citric acid solutions</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>Авдеев</surname><given-names>Я. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Avdeev</surname><given-names>Ya. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>119071</p><p>Ленинский проспект, 31, корп. 4</p><p>Москва</p></bio><bio xml:lang="en"><p>119071</p><p>Leninskii pr. 31</p><p>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>Анфилов</surname><given-names>К. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Anfilov</surname><given-names>K. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>248000</p><p>ул. Баженова. 2</p><p>Калуга</p></bio><bio xml:lang="en"><p>248000</p><p>Bazhenov str. 2</p><p>Kaluga</p></bio><email xlink:type="simple">avdeevavdeev@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кузнецов</surname><given-names>Ю. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Kuznetsov</surname><given-names>Yu. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>119071</p><p>Ленинский проспект, 31, корп. 4</p><p>Москва</p></bio><bio xml:lang="en"><p>119071</p><p>Leninskii pr. 31</p><p>Moscow</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">ФГБУН Институт физической химии и электрохимии им. А.Н. Фрумкина РАН<country>Россия</country></aff><aff xml:lang="en">A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">Калужский филиал федерального государственного бюджетного образовательного учреждения высшего образования «Московский государственный технический университет имени Н.Э. Баумана (национальный исследовательский университет)»<country>Россия</country></aff><aff xml:lang="en">Bauman Moscow State Technical University (Kaluga Branch)<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>05</day><month>01</month><year>2024</year></pub-date><volume>0</volume><issue>4</issue><fpage>151</fpage><lpage>165</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Авдеев Я.Г., Анфилов К.Л., Кузнецов Ю.И., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Авдеев Я.Г., Анфилов К.Л., Кузнецов Ю.И.</copyright-holder><copyright-holder xml:lang="en">Avdeev Y.G., Anfilov K.L., Kuznetsov Y.I.</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/35">https://www.cpmrm.ru/jour/article/view/35</self-uri><abstract><p>   Изучена коррозия меди в свободно аэрируемых растворах лимонной кислоты (C6H8O7) при 20 ± 2 °C. Скорость коррозии меди в таких растворах существенно не зависит от длительности контакта меди с агрессивной средой (1–20 сут.) и концентрации C6H8O7 (0,001–2 M) в ней. Агрессивность растворов C6H8O7 в отношении меди усиливается при переходе от статических сред к средам, перемешиваемым магнитной мешалкой. Агрессивность растворов C6H8O7 в отношении металлической меди также повышает наличие в них продукта коррозии – катионов Cu(II). Этот эффект особенно заметен при контакте её с коррозионной средой, перемешиваемой магнитной мешалкой. Для защиты меди в свободно аэрируемых растворах C6H8O7 рекомендовано производное триазола – ингибитор ИФХАН-92. Эффективность этого ингибитора существенно не зависит от длительности контакта металла с агрессивной средой, содержания в ней C6H8O7, и гидродинамических характеристик раствора. Важным свойством ИФХАН-92 является сохранение им защитного действия в отношении металлической меди даже в случае накопления в коррозионной среде катионов Cu(II), что проявляется не только в статических, но и динамических средах. Зависимость скорости коррозии меди от интенсивности перемешивания коррозивной среды в свободно аэрируемых растворах 2 М C6H8O7 и 2 М C6H8O7+0,05 M Cu(II) в отсутствии и присутствии ингибитора коррозии описывается уравнением k= a+b*n1/2, где a и b – эмпирические параметры, n – частота вращения магнитной мешалки. Добавки ИФХАН-92 снижают параметры а и b этого уравнения.</p></abstract><trans-abstract xml:lang="en"><p>   The corrosion of copper in freely aerated solutions of citric acid (C6H8O7) at 20 ± 2 °C was studied. The corrosion rate of copper in such solutions does not significantly depend on the duration of contact of copper with an aggressive environment (1–20 days) and the concentration of C6H8O7 (0,001–2 M) in it. The aggressiveness of C6H8O7 solutions towards copper increases when moving from static media to media stirred with a magnetic stirrer. Also, the aggressiveness of C6H8O7 solutions towards metallic copper is increased by the presence of a corrosion product in them – Cu(II) cations. This effect is especially noticeable when it comes into contact with a corrosive environment stirred with a magnetic stirrer. To protect copper in freely aerated C6H8O7 solutions, a triazole derivative, IFKhAN-92, is recommended. The effectiveness of this inhibitor does not significantly depend on the duration of contact of the metal with the aggressive environment, the content of C6H8O7 in it, and the hydrodynamic characteristics of the solution. An important property of the IFKhAN-92 inhibitor is that it retains its protective effect against metallic copper even in the case of accumulation of Cu(II) cations in a corrosive environment, which manifests itself not only in static but also in dynamic environments. The dependence of the copper corrosion rate on the intensity of mixing of the corrosive medium in freely aerated solutions of 2 M C6H8O7 and 2 M C6H8O7+0,05 M Cu(II), both in the absence and presence of a corrosion inhibitor, is formally described by an equation of the form k= a+b*n1/2, where a and b are empirical parameters, n is the rotation frequency of the magnetic stirrer. Additives IFKHAN-92 reduce parameters a and b of this equation.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>коррозия</kwd><kwd>ингибиторы коррозии</kwd><kwd>медь</kwd><kwd>лимонная кислота</kwd><kwd>катионы меди (II)</kwd><kwd>триазол</kwd></kwd-group><kwd-group xml:lang="en"><kwd>corrosion</kwd><kwd>corrosion inhibitors</kwd><kwd>copper</kwd><kwd>citric acid</kwd><kwd>copper (II) cations</kwd><kwd>triazoles</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>Исследование выполнено в рамках НИОКТР (2022–2024 гг): «Химическое сопротивление материалов, защита металлов и других материалов от коррозии и окисления» (регистрационный номер в ЕГИСУ 122011300078-1, инвентарный номер FFZS-2022-0013)</funding-statement></funding-group><funding-group xml:lang="en"><funding-statement>The study was carried out within the framework of R&amp;D (2022-2024 ): "Chemical resistance of materials, protection of metals and other materials from corrosion and oxidation" (registration number in EGISU 122011300078-1, inventory number FFZS-2022-0013)</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">C. 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