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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">cvmet</journal-id><journal-title-group><journal-title xml:lang="ru">Известия вузов. Цветная металлургия</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya. Non-Ferrous Metallurgy</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0021-3438</issn><issn pub-type="epub">2412-8783</issn><publisher><publisher-name>НИТУ "МИСИС"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17073/0021-3438-2019-3-68-76</article-id><article-id custom-type="elpub" pub-id-type="custom">cvmet-958</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>Коррозия и защита металлов</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Corrosion and Protection of Metals</subject></subj-group></article-categories><title-group><article-title>Разработка состава магниевого сплава для создания временных герметизирующих устройств, используемых в нефтяной промышленности</article-title><trans-title-group xml:lang="en"><trans-title>Development of high-magnesium alloy composition to create a temporary seals used in oil industry</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>Ракоч</surname><given-names>А. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Rakoch</surname><given-names>A. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Докт. хим. наук, проф. кафедры металлургии стали, новых производственных технологий и защиты металлов.</p><p>119049, г. Москва, Ленинский пр-т, 4.</p></bio><bio xml:lang="en"><p>Dr. Sci. (Chem.), prof. of the Department «Metallurgy of steel, new production technologies and protection of metals».</p><p>119049, Russia, Moscow, Leninskii pr., 4.</p></bio><email xlink:type="simple">rakoch@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>Предеин</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Predein</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Аспирант кафедры металлургии стали, новых производственных технологий и защиты металлов.</p><p>119049, г. Москва, Ленинский пр-т, 4.</p></bio><bio xml:lang="en"><p>Postgraduate student of the Department «Metallurgy of steel, new production technologies and protection of metals».</p><p>119049, Russia, Moscow, Leninskii pr., 4.</p></bio><email xlink:type="simple">predein.nik@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>Гладкова</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Gladkova</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Канд. хим. наук, доцент кафедры металлургии стали, новых производственных технологий и защиты металлов.</p><p>119049, г. Москва, Ленинский пр-т, 4.</p></bio><bio xml:lang="en"><p>Cand. Sci. (Chem.), associate prof. of the Department «Metallurgy of steel, new production technologies and protection of metals.</p><p>119049, Russia, Moscow, Leninskii pr., 4.</p></bio><email xlink:type="simple">sascha-gladkova@yandex.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>Колтыгин</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Koltygin</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Канд. хим. наук, доцент кафедры литейных технологий и художественной обработки материалов.</p><p>119049, г. Москва, Ленинский пр-т, 4.</p></bio><bio xml:lang="en"><p>Cand. Sci. (Tech.), associate prof. of the Department of foundry technologies and materials art working.</p><p>119049, Russia, Moscow, Leninskii pr., 4.</p></bio><email xlink:type="simple">misistlp@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>Ворожцова</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Vorozhtsova</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Аспирант кафедры металлургии стали, новых производственных технологий и защиты металлов.</p><p>119049, г. Москва, Ленинский пр-т, 4.</p></bio><bio xml:lang="en"><p>Postgraduate student of the Department «Metallurgy of steel, new production technologies and protection of metals».</p><p>119049, Russia, Moscow, Leninskii pr., 4.</p></bio><email xlink:type="simple">victory.vorozhtsova@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Национальный исследовательский технологический университет (НИТУ) «МИСиС».<country>Россия</country></aff><aff xml:lang="en">National University of Science and Technology (NUST) «MISIS».<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>19</day><month>06</month><year>2019</year></pub-date><volume>0</volume><issue>3</issue><fpage>68</fpage><lpage>76</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ракоч А.Г., Предеин Н.А., Гладкова А.А., Колтыгин А.В., Ворожцова В.В., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Ракоч А.Г., Предеин Н.А., Гладкова А.А., Колтыгин А.В., Ворожцова В.В.</copyright-holder><copyright-holder xml:lang="en">Rakoch A.G., Predein N.A., Gladkova A.A., Koltygin A.V., Vorozhtsova V.V.</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://cvmet.misis.ru/jour/article/view/958">https://cvmet.misis.ru/jour/article/view/958</self-uri><abstract><p>Разработан состав и определен режим термообработки получения интенсивно растворяющегося магниевого сплава для использования его в качестве шаровых пробок в условиях подготовки к работе нефтяных скважин, т.е. для герметизации различных участков скважин с последующим практически полным разрушением этих шаров в течение короткого времени (до 11 ч). Выявлено, что причиной высокой скорости растворения Mg-сплава, по составу близкого к высоко- прочному МЛ6, является повышенное содержание в нем никеля (до 0,19 %). Соединения этого элемента располагаются по границам зерен, что приводит к интенсивной межкристаллитной коррозии сплава в среде, содержащей хлорионы. Показано, что эффективным способом управления скоростью растворения Mg-сплава является получение на его поверхности покрытий различной толщины методом плазменно-электролитической обработки (ПЭО) в водном растворе, содержащем 110 г/л технического жидкого стекла. Этот способ позволил наносить покрытия толщиной от 10 до 41 мкм на экспериментальный магниевый сплав, содержащий повышенную концентрацию никеля (~0,19 %), за короткий период времени (от 10 до 20 мин) при небольшой заданной плотности переменного тока (4 А/дм2) – гальваностатический режим проведения процессов ПЭО. Коррозионные исследования проводили в 3 %-ном водном растворе KCl при температуре 93 ± 2 °С, а покрытия методом ПЭО на магниевом сплаве получали с помощью емкостной установки. Условия коррозионных испытаний материалов, используемых в качестве шаровых пробок в герметизирующих устройствах нефтяных скважин, являлись аналогичными тем, что приводятся в зарубежных исследованиях.</p></abstract><trans-abstract xml:lang="en"><p>Alloy composition was developed and heat treatment conditions were selected to obtain an intensively dissolving magnesium alloy to be used as a ball plug under oil-well precommissioning conditions, i.e. to seal various well sections with further near-complete destruction of these plugs for a short time (up to 11 h). It was found that the reason of high dissolution rate of Mg alloy with a composition similar to high-strength ML6 is a higher nickel content (up to 0,19 %). The compounds of this element are located along the grain boundaries, and it leads to intense intercrystalline corrosion of the alloy in a medium containing chlorine ions. It is shown that an effective method for controlling the Mg alloy dissolution rate is to synthesize coatings on its surface with various thicknesses by plasma electrolytic treatment (PET) in aqueous solution containing 110 g/l of commercial water glass. This method allowed synthesizing coatings with a thickness from 10 to 41 μm on the experimental magnesium alloy with increased nickel concentrations (~ 0,19 %) in a short period of time (from 10 to 20 min) with low set AC current density (4 A/dm2) – galvanostatic mode of PET processes. Corrosion investigations were carried out in 3 % KCl aqueous solution at 93 ± 2 °C. PET coatings were obtained on the magnesium alloy using a capacitive unit. Corrosion tests conditions for materials used as ball plugs in oil well seals were similar to that cited in foreign researches.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>магниевые сплавы</kwd><kwd>плазменно-электролитическая обработка</kwd><kwd>герметизирующие устройства</kwd><kwd>нефтяные скважины</kwd><kwd>саморастворяющиеся шаровые пробки</kwd></kwd-group><kwd-group xml:lang="en"><kwd>magnesium alloys</kwd><kwd>plasma electrolytic treatment</kwd><kwd>sealing devices</kwd><kwd>oil wells</kwd><kwd>self-dissolving ball plugs</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Aviles I., Dardis M., Jacob G. Degradable alternative to risky mill-out operations in plug and perf. In: SPE/ICoTA Coiled Tubing &amp; Well Intervention Conference &amp; Exhibition (Woodlands, Texas, USA, 2015). P. 1—10. https://doi.org/10.2118/173695-MS.</mixed-citation><mixed-citation xml:lang="en">Aviles I., Dardis M., Jacob G. Degradable alternative to risky mill-out operations in plug and perf. In: SPE/ICoTA Coiled Tubing &amp; Well Intervention Conference &amp; Exhibition (Woodlands, Texas, USA, 2015). P. 1—10. https://doi.org/10.2118/173695-MS.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Fripp M., Walton Z. Degradable metal for use in a fully dissolvable frac plug. In: Offshore technology conference (Houston, Texas, USA, 2016). P. 1—9. https://doi.org/10.4043/27187-MS.</mixed-citation><mixed-citation xml:lang="en">Fripp M., Walton Z. Degradable metal for use in a fully dissolvable frac plug. In: Offshore technology conference (Houston, Texas, USA, 2016). P. 1—9. https://doi.org/10.4043/27187-MS.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Chali E. Corrosion resistance of aluminium and magnesium alloys: understanding, performance and testing. New Jersey: John Wiley and Sons, 2010. DOI:10.1002/9780470531778.</mixed-citation><mixed-citation xml:lang="en">Chali E. Corrosion resistance of aluminium and magnesium alloys: understanding, performance and testing. New Jersey: John Wiley and Sons, 2010. DOI:10.1002/9780470531778.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Энциклопедия современной техники. Строительство. URL: http://www.bibliotekar.ru/spravochnik-181-2/145.htm. Encyclopedia of modern technology. Building. URL: http://www.biblioteka.ru/spravochnik-181-2/145/htm (In Russ.).</mixed-citation><mixed-citation xml:lang="en">Энциклопедия современной техники. Строительство. URL: http://www.bibliotekar.ru/spravochnik-181-2/145.htm. Encyclopedia of modern technology. Building. URL: http://www.biblioteka.ru/spravochnik-181-2/145/htm (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Колачев Б.А., Елагин В.И., Ливанов В.А. Материаловедение и термическая обработка цветных металлов и сплавов. М.: МИСиС, 2001. Kolachev B.A., Elagin V.I., Livanov V.A. Materials science and thermal processing non-ferrous metals and alloys. Moscow: MISIS, 2001 (In Russ.).</mixed-citation><mixed-citation xml:lang="en">Колачев Б.А., Елагин В.И., Ливанов В.А. Материаловедение и термическая обработка цветных металлов и сплавов. М.: МИСиС, 2001. Kolachev B.A., Elagin V.I., Livanov V.A. Materials science and thermal processing non-ferrous metals and alloys. Moscow: MISIS, 2001 (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Курдюмов А.В., Пикунов М.В., Чурсин В.М., Бибиков Е.Л. Производство отливок из сплавов цветных метал лов: Учеб. для вузов. М.: МИСиС, 1996. Kurdyumov A.V., Pikunov M.V., Chursin V.M., Bibikov E.L. Manufacture of castings from non-ferrous alloys. Moscow: MISIS, 1996 (In Russ.).</mixed-citation><mixed-citation xml:lang="en">Курдюмов А.В., Пикунов М.В., Чурсин В.М., Бибиков Е.Л. Производство отливок из сплавов цветных метал лов: Учеб. для вузов. М.: МИСиС, 1996. Kurdyumov A.V., Pikunov M.V., Chursin V.M., Bibikov E.L. Manufacture of castings from non-ferrous alloys. Moscow: MISIS, 1996 (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Ракоч А.Г., Дуб А.В., Гладкова А.А. Анодирование легких сплавов при различных электрических режимах. Плазменно-электролитическая нанотехнология. М.: Старая Басманная, 2012. Rakoch A.G., Dub A.V., Gladkova A.A. Anodizing of light alloys under different electrical modes. Plasmaelectrolytic nanotechnology. Moscow: Staraya Basmannaya, 2012 (In Russ.).</mixed-citation><mixed-citation xml:lang="en">Ракоч А.Г., Дуб А.В., Гладкова А.А. Анодирование легких сплавов при различных электрических режимах. Плазменно-электролитическая нанотехнология. М.: Старая Басманная, 2012. Rakoch A.G., Dub A.V., Gladkova A.A. Anodizing of light alloys under different electrical modes. Plasmaelectrolytic nanotechnology. Moscow: Staraya Basmannaya, 2012 (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Снежко Л.А., Руднев В.С. Анодно-искровое оксидирование магния. М.: Техника. ТУМА ГРУПП, 2014. Snezhko L.A., Rudnev V.S. Spark anodizing oxidation of magnesium. Moscow: Tekhnika. TUMA GRUPP, 2014 (In Russ.).</mixed-citation><mixed-citation xml:lang="en">Снежко Л.А., Руднев В.С. Анодно-искровое оксидирование магния. М.: Техника. ТУМА ГРУПП, 2014. Snezhko L.A., Rudnev V.S. Spark anodizing oxidation of magnesium. Moscow: Tekhnika. TUMA GRUPP, 2014 (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">El Mahallawy N.A., Shoeib M.A., Abouelenain M.H. AZ91 Magnesium alloys: anodizing of using environmental friendly electrolytes. J. Surf. Eng. Mater. Adv. Technol. 2011. No. 1. P. 62—72. DOI:10.4236/jsemat.2011.12010.</mixed-citation><mixed-citation xml:lang="en">El Mahallawy N.A., Shoeib M.A., Abouelenain M.H. AZ91 Magnesium alloys: anodizing of using environmental friendly electrolytes. J. Surf. Eng. Mater. Adv. Technol. 2011. No. 1. P. 62—72. DOI:10.4236/jsemat.2011.12010.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Yang Y., Wu H. Effect of current density on corrosion resistance of micro-arc oxide coatings on magnesium alloy. Trans. Nonferr. Met. Soc. China. 2010. Vol. 20. P. 688—692. http://doi.org/10.1016/S1003-6326(10)60563-8.</mixed-citation><mixed-citation xml:lang="en">Yang Y., Wu H. Effect of current density on corrosion resistance of micro-arc oxide coatings on magnesium alloy. Trans. Nonferr. Met. Soc. China. 2010. Vol. 20. P. 688—692. http://doi.org/10.1016/S1003-6326(10)60563-8.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Arrabal R., Mota J.M., Criado A., Pardo A., Mohedano M., Matykina E. Assessment of duplex coating combining plasma electrolytic oxidation and polymer layer on AZ31 magnesium alloy. Surf. Coat. Technol. 2012. Vol. 206. P. 4692—4703. http://doi.org/10.1016/j.surfcoat.2012.05.091.</mixed-citation><mixed-citation xml:lang="en">Arrabal R., Mota J.M., Criado A., Pardo A., Mohedano M., Matykina E. Assessment of duplex coating combining plasma electrolytic oxidation and polymer layer on AZ31 magnesium alloy. Surf. Coat. Technol. 2012. Vol. 206. P. 4692—4703. http://doi.org/10.1016/j.surfcoat.2012.05.091.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Guo H., An M. Effect of surfactants on surface morphology of ceramic coatings fabricated on magnesium alloys by micro-arc oxidation. Thin Solid Films. 2006. Vol. 500. P. 186—189. http://doi.org/10.1016/j.tsf.2005.11.045.</mixed-citation><mixed-citation xml:lang="en">Guo H., An M. Effect of surfactants on surface morphology of ceramic coatings fabricated on magnesium alloys by micro-arc oxidation. Thin Solid Films. 2006. Vol. 500. P. 186—189. http://doi.org/10.1016/j.tsf.2005.11.045.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Tang Y., Zhao X., Jiang K. Chen J., Zuo Y. The Influence of duty cycle on the bonding strength of AZ31B magnesium alloy by microarc oxidation treatment. Surf. Coat. Technol. 2010. Vol. 205. P. 1789—1792. http://doi.org/10.1016/j.surfcoat.2010.05.016.</mixed-citation><mixed-citation xml:lang="en">Tang Y., Zhao X., Jiang K. Chen J., Zuo Y. The Influence of duty cycle on the bonding strength of AZ31B magnesium alloy by microarc oxidation treatment. Surf. Coat. Technol. 2010. Vol. 205. P. 1789—1792. http://doi.org/10.1016/j.surfcoat.2010.05.016.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Cai Q., Wang L., Wei B. Electrochemical performance of microarc oxidation films formed on AZ91D magnesium alloy in silicate and phosphate electrolytes. Surf. Coat. Technol. 2006. Vol. 200. P. 3727—3733. http://doi.org/10.1016/j.surfcoat.2005.05.039.</mixed-citation><mixed-citation xml:lang="en">Cai Q., Wang L., Wei B. Electrochemical performance of microarc oxidation films formed on AZ91D magnesium alloy in silicate and phosphate electrolytes. Surf. Coat. Technol. 2006. Vol. 200. P. 3727—3733. http://doi.org/10.1016/j.surfcoat.2005.05.039.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Wang Y.M., Wang F.H., Xu M.J., Zhao B., Guo L.X., Ouyang J.H. Microstructure and corrosion behavior of coated AZ91 alloy by microarc oxidation for biomedical application. Appl. Surf. Sci. 2009. Vol. 255. P. 9124—9131. http://doi.org/10.1016/j.apsusc.2009.06.116.</mixed-citation><mixed-citation xml:lang="en">Wang Y.M., Wang F.H., Xu M.J., Zhao B., Guo L.X., Ouyang J.H. Microstructure and corrosion behavior of coated AZ91 alloy by microarc oxidation for biomedical application. Appl. Surf. Sci. 2009. Vol. 255. P. 9124—9131. http://doi.org/10.1016/j.apsusc.2009.06.116.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Ma Y., Nie X., Northwood D., Hu H. Systematic study of the electrolytic plasma oxidation process on Mg alloy for corrosion protection. Thin Solid Films. 2006. Vol. 494. P. 296—301. http://doi.org/10.1016/j.tsf.2005.08.156.</mixed-citation><mixed-citation xml:lang="en">Ma Y., Nie X., Northwood D., Hu H. Systematic study of the electrolytic plasma oxidation process on Mg alloy for corrosion protection. Thin Solid Films. 2006. Vol. 494. P. 296—301. http://doi.org/10.1016/j.tsf.2005.08.156.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Zhang P., Nie X., Hua H., Liu Y. TEM analysis and tribological properties of plasma electrolytic oxidation (PEO) coatings on magnesium engine AJ62 alloy. Surf. Coat. Technol. 2010. Vol. 205. P. 1508—1514. http://doi.org/10.1016/j.surfcoat.2010.10.015.</mixed-citation><mixed-citation xml:lang="en">Zhang P., Nie X., Hua H., Liu Y. TEM analysis and tribological properties of plasma electrolytic oxidation (PEO) coatings on magnesium engine AJ62 alloy. Surf. Coat. Technol. 2010. Vol. 205. P. 1508—1514. http://doi.org/10.1016/j.surfcoat.2010.10.015.</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Yerokhin A.L., Shatrov A., Samsonov V., Shashkov P., Leyland A., Matthews A. Fatigue properties of Keronite coatings on a magnesium alloy. Surf. Coat. Technol. 2004. Vol. 182. P. 78—84. http://doi.org/10.1016/S0257-8972(03)00877-6.</mixed-citation><mixed-citation xml:lang="en">Yerokhin A.L., Shatrov A., Samsonov V., Shashkov P., Leyland A., Matthews A. Fatigue properties of Keronite coatings on a magnesium alloy. Surf. Coat. Technol. 2004. Vol. 182. P. 78—84. http://doi.org/10.1016/S0257-8972(03)00877-6.</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Barbosa D.P., Knornschild G., Strunk H.P. Electron microscopic studies of anodic oxide films on the AZ91HP alloy. Mater. Res. 2003. Vol. 6. P. 103—106. http://dx.doi.org/10.1590/S1516-14392003000100018.</mixed-citation><mixed-citation xml:lang="en">Barbosa D.P., Knornschild G., Strunk H.P. Electron microscopic studies of anodic oxide films on the AZ91HP alloy. Mater. Res. 2003. Vol. 6. P. 103—106. http://dx.doi.org/10.1590/S1516-14392003000100018.</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Rakoch A.G., Gladkova A.A., Zayar Linn, Strekalina D.M. The evidence of cathodic micro-discharges during plasma electrolytic oxidation of light metallic alloys and micro-discharge intensity depending on pH of the electrolyte. Surf. Coat. Technol. 2015. Vol. 269. P. 138—144. http://doi.org/10.1016/j.surfcoat.2015.02.026.</mixed-citation><mixed-citation xml:lang="en">Rakoch A.G., Gladkova A.A., Zayar Linn, Strekalina D.M. The evidence of cathodic micro-discharges during plasma electrolytic oxidation of light metallic alloys and micro-discharge intensity depending on pH of the electrolyte. Surf. Coat. Technol. 2015. Vol. 269. P. 138—144. http://doi.org/10.1016/j.surfcoat.2015.02.026.</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Хохлов В.В., Ракоч А.Г., Хла Мо, Жаpинов П.М., Баутин В.А., Баpдин И.В. Влияние силиката натрия на механизм роста оксидно-керамических покрытий при микродуговом оксидировании алюминиевых сплавов. Коррозия: материалы, защита. 2007. No. 1. С. 28—33. Hohlov V.V., Rakoch A.G., Hla Mo, Zharinov P.M., Bautin V.A., Bardin I.V. Impact of sodium silicate to the ceramic oxide coating growth mechanism at micro-arc oxidation of aluminum alloys. Korroziya: materialy, zashchita. 2007. No. 1. P. 28—33 (In Russ.).</mixed-citation><mixed-citation xml:lang="en">Хохлов В.В., Ракоч А.Г., Хла Мо, Жаpинов П.М., Баутин В.А., Баpдин И.В. Влияние силиката натрия на механизм роста оксидно-керамических покрытий при микродуговом оксидировании алюминиевых сплавов. Коррозия: материалы, защита. 2007. No. 1. С. 28—33. Hohlov V.V., Rakoch A.G., Hla Mo, Zharinov P.M., Bautin V.A., Bardin I.V. Impact of sodium silicate to the ceramic oxide coating growth mechanism at micro-arc oxidation of aluminum alloys. Korroziya: materialy, zashchita. 2007. No. 1. P. 28—33 (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">Ракоч А.Г., Гладкова А.А., Дуб А.В. Плазменно- электролитическая обработка алюминиевых и ти- тановых сплавов. М.: Изд. дом МИСиС, 2017. Rakoch A.G., Gladkova A.A., Dub A.V. Plasma-electrolytic treatment of aluminum and titanium alloys. Moscow: MISIS, 2017 (In Russ.).</mixed-citation><mixed-citation xml:lang="en">Ракоч А.Г., Гладкова А.А., Дуб А.В. Плазменно- электролитическая обработка алюминиевых и ти- тановых сплавов. М.: Изд. дом МИСиС, 2017. Rakoch A.G., Gladkova A.A., Dub A.V. Plasma-electrolytic treatment of aluminum and titanium alloys. Moscow: MISIS, 2017 (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">Томашов Н.Д., Чернова Г.П. Теория коррозии и кор- розионно-стойкие сплавы: Учеб. пос. для вузов. М.: Металлургия, 1993. Tomashov N.D., Chernova G.P. Theory of corrosion and corrosion-resistant alloys: A manual for universities. Moscow: Metallurgiya, 1993 (In Russ.).</mixed-citation><mixed-citation xml:lang="en">Томашов Н.Д., Чернова Г.П. Теория коррозии и кор- розионно-стойкие сплавы: Учеб. пос. для вузов. М.: Металлургия, 1993. Tomashov N.D., Chernova G.P. Theory of corrosion and corrosion-resistant alloys: A manual for universities. Moscow: Metallurgiya, 1993 (In Russ.).</mixed-citation></citation-alternatives></ref><ref id="cit24"><label>24</label><citation-alternatives><mixed-citation xml:lang="ru">Uhlig Herbert H., Revie R. Winston. Corrosion and corrosion control: An introduction to corrosion science and engineering. 4th ed. John Wiley and Sons, Inc., Publ., 2008.</mixed-citation><mixed-citation xml:lang="en">Uhlig Herbert H., Revie R. Winston. Corrosion and corrosion control: An introduction to corrosion science and engineering. 4th ed. John Wiley and Sons, Inc., Publ., 2008.</mixed-citation></citation-alternatives></ref><ref id="cit25"><label>25</label><citation-alternatives><mixed-citation xml:lang="ru">Barchiche C.-E., Rocca E., Juers C., Hazan J., Steinmetz J. Corrosion resistance of plasma-anodized AZ91D magnesium alloy by electrochemical methods. Electrochim. Acta. 2007. Vol. 53. P. 417—425. http://doi.org/10.1016/j.electacta.2007.04.030.</mixed-citation><mixed-citation xml:lang="en">Barchiche C.-E., Rocca E., Juers C., Hazan J., Steinmetz J. Corrosion resistance of plasma-anodized AZ91D magnesium alloy by electrochemical methods. Electrochim. Acta. 2007. Vol. 53. P. 417—425. http://doi.org/10.1016/j.electacta.2007.04.030.</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
