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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">RUDN Journal of Engineering Research</journal-id><journal-title-group><journal-title xml:lang="en">RUDN Journal of Engineering Research</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Российского университета дружбы народов. Серия: Инженерные исследования</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2312-8143</issn><issn publication-format="electronic">2312-8151</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">23377</article-id><article-id pub-id-type="doi">10.22363/2312-8143-2019-20-3-244-253</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Earth science</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Науки о земле</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">The influences of the crude oils on the decay of metals</article-title><trans-title-group xml:lang="ru"><trans-title>Влияние сырой нефти на разрушение металлов</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Aluvihara</surname><given-names>Suresh</given-names></name><name xml:lang="ru"><surname>Алувихара</surname><given-names>Суреш</given-names></name></name-alternatives><bio xml:lang="en"><p>postgraduate student, Department of Chemical and Process Engineering</p></bio><bio xml:lang="ru"><p>аспирант кафедры химического и технологического машиностроения</p></bio><email>sureshaluvihare@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Premachandra</surname><given-names>Jagath K.</given-names></name><name xml:lang="ru"><surname>Премачандра</surname><given-names>Джагат Кумара</given-names></name></name-alternatives><bio xml:lang="en"><p>Professor, Department of Chemical and Process Engineering</p></bio><bio xml:lang="ru"><p>профессор кафедры химико-технологических процессов машиностроения</p></bio><email>sureshaluvihare@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">University of Peradeniya</institution></aff><aff><institution xml:lang="ru">Университет Перадении</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">University of Moratuwa</institution></aff><aff><institution xml:lang="ru">Университет Моратувы</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2019-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2019</year></pub-date><volume>20</volume><issue>3</issue><issue-title xml:lang="en">VOL 20, NO3 (2019)</issue-title><issue-title xml:lang="ru">ТОМ 20, №3 (2019)</issue-title><fpage>244</fpage><lpage>253</lpage><history><date date-type="received" iso-8601-date="2020-04-05"><day>05</day><month>04</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2019, Aluvihara S., Premachandra J.K.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2019, Алувихара С., Премачандра Д.К.</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="en">Aluvihara S., Premachandra J.K.</copyright-holder><copyright-holder xml:lang="ru">Алувихара С., Премачандра Д.К.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/engineering-researches/article/view/23377">https://journals.rudn.ru/engineering-researches/article/view/23377</self-uri><abstract xml:lang="en"><p>Crude oils are the essential resources for the usages of industrial purposes in various forms and the refining is a key process of separating the mixture of raw crude oils. In the existing research there were expected to investigate the impact of salts, organic acids, mercaptans and elemental sulfur of crude oils on the corrosion rates of seven different types of ferrous metals in both qualitatively and quantitatively. The chemical compositions of such selected ferrous metals and the above mentioned corrosive properties of two different types of crude oils were measured by the standard instruments and methodologies. A set of similar sized metal coupons were prepared from seven different types of metals and the corrosion rates of such metals were determined by the relative weight loss method. In addition, that the corroded metal surfaces were analyzed under the microscope, decayed metal concentrations and deductions of the initial hardness of metal coupons were measured. According to the obtained results that there were observed the lower corrosion rates from stainless steels with at least 12% of chromium and nickel, higher corrosive impact from salt, formations of FeS, Fe2O3, corrosion cracks and pitting corrosion.</p></abstract><trans-abstract xml:lang="ru"><p>Сырые нефти являются основным ресурсом для использования в промышленных целях в различных формах, а их переработка - ключевой процесс разделения смеси сырых нефтей. В проведенном исследовании предполагалось изучить влияние солей, органических кислот, меркаптанов и элементарной серы сырых нефтей на скорость коррозии семи различных типов черных металлов как в качественном, так и в количественном отношении. Химические составы отобранных черных металлов и вышеупомянутые коррозионные свойства двух различных типов сырой нефти измерялись с помощью стандартных приборов и методик. Набор металлических купонов одинакового размера был приготовлен из семи различных типов металлов, скорости коррозии металлов определялись методом относительной потери веса. Кроме того, под микроскопом анализировались корродированные металлические поверхности, измерялись концентрации распадающихся металлов и вычеты начальной твердости металлических купонов. Согласно полученным результатам, наблюдаются более низкие скорости коррозии купонов из нержавеющих сталей с содержанием хрома и никеля не менее 12 %, более высокое коррозионное воздействие - со стороны солей, образования FeS, Fe2O3, коррозионных трещин и питтинговой коррозии.</p></trans-abstract><kwd-group xml:lang="en"><kwd>crude oils</kwd><kwd>corrosive properties</kwd><kwd>ferrous metals</kwd><kwd>decay</kwd><kwd>weight loss</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>сырая нефть</kwd><kwd>коррозионные свойства</kwd><kwd>черные металлы</kwd><kwd>распад</kwd><kwd>потеря массы</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Khana OP. Materials Science and Metallurgy. New Delhi: Dhanpet Rai and Sons Publication; 2009.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Alsahhaf TA, Elkilani A, Fahim MA. Fundamentals of Petroleum Refining. 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