Development of composite materials for corrosion protection of main gas and oil pipelines with increased chemical adhesion

Литература (45)

1. 1. Полинский А.С., Пшежецкий В.С., Кабанов В.А. Особенности связывания ионов металла полимерными лигандами. Система Сu (II) -поли-4-винилпиридин //Докл.АН, 1981-. Т.256, № 1.-1834-1838.
2. 2. Зенин А.Б., Кабанов Н.М., Кокорин А.И., Рогачева В.Б. Тройные полимер-металлические комплексы на основе полиакриловой кислоты линейного полиэтиленимитна и меди// Высомолек.соед., 1977.-Т.А, №1.-С.118-124.
3. 3. Мирошниченко И.Б., Алимова Х.А., Ташпулатова Ю.Т., Федорова Н.А. Исследования процесса цветообразования на натуральном шелка, обрабатываемом методом диазотирования// Изв.Вузов, №2,2002,-С68
4. 4. Абдурахманов Ш.Г., Негматов С.С., Рахимова З.М. Крашение текстильных материалов путем синтеза красителя на волокне // XVIII Национальный химический конгресс. Г.Карс, Турция. 2004.г. Ibragimova Maftuna Ibodulloyevna – Buxoro davlat tibbiyot instituti tayanch doktoranti. Amonov Muxtar Raxmatovich – texnika fanari doktori, Buxoro davlat universiteti “Kimyo va neft-gaz texnologiya”kafedrasi professori. DEVELOPMENT OF COMPOSITE MATERIALS FOR CORROSION PROTECTION OF MAIN GAS AND OIL PIPELINES WITH INCREASED CHEMICAL ADHESION Kadirxanov J., Urinov A.A. Namangan state technical university. Abstract. At present, during new construction of trunk oil pipelines, as well as during re-insulation of existing pipelines for their anti-corrosion protection, various insulation materials and protective coating designs are used, ranging from bituminous-mastic trace application to multilayer polymer coatings of factory application. But with all the variety of protective coatings available, it is practically impossible to make a choice in favor of only one universal coating that would meet all requirements and provide effective corrosion protection of pipelines under various construction and operating conditions. Keywords: corrosion, corrosion protection methods, gas condensate wells, neutral wells, oil production industry, destruction of tanks, poker technology, operation, production string, tubing, hydrogen sulfide corrosion, carbon dioxide corrosion. РАЗРАБОТКА КОМПОЗИТНЫХ МАТЕРИАЛОВ ДЛЯ ЗАЩИТЫ ОТ КОРРОЗИИ МАГИСТРАЛЬНЫХ ГАЗО- И НЕФТЕПРОВОДОВ С ПОВЫШЕННОЙ ХИМИЧЕСКОЙ АДГЕЗИЕЙ Кадирханов Ж., Уринов А.А. Наманганский государственный технический университет. Аннотация. В настоящее время при новом строительстве магистральных нефтепроводов, а также при переизоляции существующих трубопроводов для их антикоррозионной защиты используются различные изоляционные материалы и конструкции защитных покрытий — от битумно-мастичных слоев до многослойных полимерных покрытий заводского изготовления. Однако при всем разнообразии существующих защитных покрытий практически невозможно отдать предпочтение какому-либо одному универсальному покрытию, которое бы удовлетворяло всем требованиям и обеспечивало эффективную защиту трубопроводов от коррозии в различных условиях строительства и эксплуатации. Ключевые слова: коррозия, методы защиты от коррозии, газоконденсатные скважины, нейтральные скважины, нефтедобывающая промышленность, разрушение резервуаров, технология «покер», эксплуатация, эксплуатационная колонна, насосно-компрессорные трубы, коррозия сероводородом, коррозия углекислым газом. “Развитие науки и технологий” Научно–технический журнал №5/2025
5. Кимё ва кимёвий технологиялар ASOSIY GAZ VA NEFT QUVURLARINI KORROZIYADAN HIMOYA QILISH UCHUN KIMYOVIY YOPISHQOQLIGI OSHIRILGAN KOMPOZIT MATERIALLARNI ISHLAB CHIQISH Kadirxanov J., Urinov A.A. Namangan davlat texnika universiteti. Annotatsiya. Hozirgi vaqtda magistral neft quvurlarini yangidan qurishda hamda mavjud quvurlarni qayta izolyatsiya qilish jarayonida ularni korroziyadan himoya qilish uchun turli izolyatsiya materiallari va himoya qoplamalari ishlatilmoqda. Ular oddiy bitum-mastika asosidagi izolyatsiyalardan tortib, zavodda qo'llaniladigan ko‘p qatlamli polimer qoplamalargacha bo‘lishi mumkin. Biroq mavjud himoya qoplamalarining xilma-xilligiga qaramay, barcha talablarga javob beradigan va har xil qurilish hamda ekspluatatsiya sharoitlarida quvurlarni samarali korroziyadan himoya qila oladigan yagona universal qoplamani tanlash deyarli imkonsizdir. Kalit so‘zlar: korroziya, korroziyadan himoya usullari, gaz kondensat quduqlari, neytral quduqlar, neft qazib olish sanoati, rezervuarlarning yemirilishi, poker texnologiyasi, ekspluatatsiya, quduq tubi quvurlari, quvurlar tizimi, vodorod sulfidli korroziya, karbonat angidridli korroziya. Introduction. The choice of insulation materials and optimal protective coating systems is determined by many factors, but in general it is obvious that the highest performance is achieved by factory applied protective coatings of pipes, connecting parts and shut-off valves of pipelines. Only in stationary factory or base conditions it is possible to ensure high quality of pipe surface preparation (cleaning, technological heating to the required temperature) and application of protective coatings with the use of technologies, equipment and materials that cannot be used in the route method of pipeline insulation. Corrosion damage of machine parts and mechanisms, gas and oil equipment during storage and application reduces reliability of operation and shortens their service life, corrosion products and protective materials removed from metal surfaces get into the environment and pollute it. Therefore, in all developed countries, the problems of protection of machinery against corrosion and environmental protection have been and remain relevant
6. [1]. One of the most common methods of corrosion protection is coating the surface of metals with paint and varnish materials. If the protective coating on the metal has sufficient thickness or is sufficiently resistant to water and oxygen, it protects the metal from corrosion due to the mechanical barrier
7. [2]. In this connection, there is a necessity to develop new composite materials on the basis of local raw materials and production wastes, allowing to reduce corrosiveness of main gas and oil pipelines. Results of the study and their analysis. To date, during the construction of trunk oil pipelines polymer tape and bitumen-mastic coatings of trace application are practically not used. These types of protective coatings are used only during repair and re-insulation of oil pipelines. New construction of trunk pipelines is carried out using pipes, shaped connecting parts and pipeline gate valves with factoryapplied coatings based on modern polymeric materials. In route conditions only isolation of the welded joints zone of pipelines by coatings based on heat shrinkable polymer tapes is carried out. Structurally such protective coating applied on liquid two-component epoxy primer is similar to the factory polyethylene coating and has rather high protective operational properties
8. [3]. It should be noted that in the last 7-8 years the general level of corrosion protection of pipelines has significantly increased due to the introduction of new technologies, high-quality insulation materials, wide use of pipes and fittings with factory coatings in the construction of pipelines. it can also be stated that modern protective coatings, provided the requirements for construction and laying of pipelines are met, can ensure their accident-free (due to corrosion) operation for the entire period of operation (40-50 years and more)
9. [4]. We have tested dozens of types of various protective coatings for pipelines and accumulated considerable experience in their practical application. The technology of factory insulation of pipes and pipeline elements has been mastered at a number of enterprises and continues to be implemented at high rates. The actual task is not only the development of new requirements for “Фан ва технологиялар тараққиёти” Илмий–техникавий журнал №5/2025
10. Химия и химические технологии protective coatings, but also the revision of existing standards, making changes and additions to them, introduction of new test methods. External coatings used for anticorrosion protection of pipelines should meet certain technical requirements. At present the use of external coatings for corrosion protection of trunk and field pipelines is regulated by the Russian standard GOST R 51164-98 “Trunk Steel Pipelines. General requirements for corrosion protection”. We have tested dozens of types of various protective coatings for pipelines and accumulated considerable experience in their practical application. The technology of factory insulation of pipes and pipeline elements has been mastered at a number of domestic enterprises and continues to be implemented at high rates. The actual task is not only the development of new requirements for protective coatings, but also the revision of existing standards, making changes and additions to them, introduction of new test methods
11. [5]. It should also be emphasized that from the moment of development of industry standards, from the establishment of reasonable, strict, but at the same time feasible technical requirements for coatings, the general improvement of the quality of corrosion protection of pipelines begins. Let's consider the main types of modern coatings currently used for corrosion protection of main oil pipelines
12. [6]. Epoxy, polypropylene and polyethylene protective coatings are most often used as factory pipe coatings during construction of gas and oil trunk pipelines. In the USA, Canada, Great Britain and a number of other countries the most popular are factory epoxy pipe coatings with a thickness of 350-400 microns. Pipe coatings based on powder epoxy paints have high adhesion to steel, resistance to cathodic peeling, increased (up to 80-100°C) heat resistance
13. [7]. At the same time, the low impact strength of epoxy coatings, especially at subzero temperatures, largely limits the scope of their application. This is the reason why the factory insulation of pipes with epoxy powder coatings, which was first introduced at the Volzhsky Pipe Plant more than 20 years ago, has not been widely used in our country. Epoxy coatings could not compete with factory polyethylene pipe coatings
14. [8]. In foreign practice in recent years more and more preference is given to two-layer epoxy pipe coatings. Such coatings, consisting of inner insulating and outer protective layer with total thickness of 750-1000 microns, have high resistance to abrasive wear, abrasion, have increased impact strength, which practically does not change at ambient temperatures from + 40°C to - 40°C
15. [9]. Single-layer factory epoxy coatings are recommended for construction of oil pipelines up to and including 530 mm in diameter, and two-layer epoxy coatings are recommended for construction of pipelines up to and including 820 mm in diameter. It is most preferable to use this type of protective coating for insulation of pile supports, for construction of pipeline sections by trenchless laying method, for anticorrosion protection of “hot” (up to 80-100°C) sections of pipelines, as well as for anticorrosion coating of pipes with heat-insulating polyurethane foam coating. One of the most promising external coatings of pipelines is undoubtedly factory polypropylene coatings. Figure1. Types of anti-corrosion coatings for main pipes “Развитие науки и технологий” Научно–технический журнал №5/2025
16. Кимё ва кимёвий технологиялар Many methods are known to combat corrosion. Of these, several main groups can be distinguished. The first group of protection is applied at the stage of metal production during its metallurgical and mechanical processing. The general theory of alloying is based on three main factors that characterize the effectiveness of the corrosion element
17. [8]. The corrosion rate can be reduced or prevented altogether by creating alloys that form a layer of corrosion products with high protective properties on their surface under the action of aggressive medium. Alloying of structural steels with copper-zinc and aluminum contributes to the increase of protective properties of the surface layer and eliminates the possibility of internal stresses in it
18. [9]. The most universal way to protect metals from corrosion is the application of both metallic and non-metallic coatings on the metal surface. The main purpose of the protective coating is, on the one hand, to create a barrier layer that prevents the penetration of corrosive medium to the metal surface, and on the other hand, to limit or completely prevent the formation of a new phase of corrosion products at the metal-coating interface. The material of the protective coating, first of all, should have high chemical stability, weak permeability to water, gases, chlorine vapor, sulfate, etc., good to the metal, mechanical strength and stability of the structure. We have investigated physical, chemical and technological properties of the developed anticorrosive materials. On the surface of the building material during a certain time and at a given pressure did not occur any changes, that is, on the surface of the sample did not appear water, hence the material is considered to have withstood the test, quality assessments of the developed composite anticorrosive material are shown in Table
19. 1. Table
20. 1. Quality of the developed composite anticorrosive material Name of indicators Composite anticorrosive material Appearance Homogeneous liquid of black color Drying time, at 20°C 5 minutes Adhesion strength, MPa 0,2 Thickness of one layer, mm 1,0 Consumption per one layer, kg/m 2 1,7-2,0 Water absorption within 24 h% by weight 0,11 Water resistance during 72 h at pressure not less than 0,001 MPa Resists Softening point, °C, not lower than
21. 80 Loss of mass when material is heated (Q), % 0,24 Density at 200C, g/cm 3 0,94 г/см3 Mass fraction of non-volatile substances, %, not less than
22. 60 Flexibility on a bar with radius 5,0±0,2 mm at temperature 50C (GOST 26589-94) No cracks Warranty storage period 18 months Table
23. 2. Protective effect of the developed anticorrosive coating at salt-acid corrosion on “D” grade steel Аnticorrosive material HCl concentration, % Corrosion rate, g/m2 h Degree of protection, % 23 32,4601
24. In order to determine the optimal values of the obtained research results, a full factor experiment was conducted
25. [10]. Table 3 shows the values of the input factors. “Фан ва технологиялар тараққиёти” Илмий–техникавий журнал №5/2025
26. Химия и химические технологии Table
27. 3. Input factors o/n Factors Designation levels of variation variation -1 0 +1
28. 1 Corrosion rate, g/m2 h Х1 30 35 40 5
29. 2 HCl concentration, % Х2 15 25 35 10
30. 3 Drying time, min Х3 10 13 16
31. 3 Table4. Рlanning matrix o /n X1 X
32. 2 X
33. 3 Y1 1 75 80 10 95 2 95 80 10 105 3 75 120 10 130 4 95 120 10 140 5 75 80 16 110 6 95 80 16 125 7 75 120 16 140 8 95 120 16 160 9 85 100 13 125 1 0 85 100 13 126 1 1 85 100 13 125 = 125,62 + 16,875 ∗𝑥2 + 8,125 ∗𝑥3 (x1=0) 𝑦= 125,62 + 6,875 ∗𝑥1 + 8,125 ∗ 𝑥3 + 1,875 ∗𝑥1 ∗𝑥3 (x2=0) Corrosion rate 36 28 1  = x , drying time 20 10 3  = x 0 2 = x HCl concentration 25 21 2  = x , drying time 20 10 3  = x 0 1 = x “Развитие науки и технологий” Научно–технический журнал №5/2025
34. Кимё ва кимёвий технологиялар 𝑦= 125,62 + 6,875 ∗𝑥1 + 16,875 ∗𝑥2 (x3=0) Corrosion rate 36 28 1  = x , HCl concentration 25 21 2  = x , 0 3 = x Thus, as a result of the full factor experiment it is established that the efficiency of corrosion protection has high indicators at corrosion rate equal to 32 (g/m2-h), the percentage of HCl concentration 23% and the drying time of anticorrosion composition 15 minutes. Based on the results of the experiment it can be concluded that the identified optimal parameters allow to develop an effective and resource-saving formulation of anticorrosion coating. The obtained results will be used to select the optimal concentration that effectively protects oil and gas pipelines from corrosion. Conclusion. The developed composite anticorrosive material is considered to have passed the test if there are no signs of swelling, displacement of the cover layer and excessive elongation on the surface of the sample. Indeed, the results of the experiments showed the obtaining of a high-quality bituminous composition, not inferior to the requirements of standards. On the basis of physical and mechanical studies proved the possibility of obtaining a competitive bitumen composition that meets the requirements of standards. References
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45. 10. Tikhomirov V.B. Planning and Analysis of Experiment (In light industry). M., “Light industry”. 1974.-262 p. Kadirxanov Jamshid – Associate Professor, Namangan state technical university. E-mail: Kadirxanov @mail.ru Urinov Abrorbek Axrorovich – PhD, Namangan state technical university. Tel: +998919799275 E-mail:abrormagnat @mail.ru ГИДРОФОБНАЯ КОМПОЗИЦИЯ ДЛЯ СТРОИТЕЛЬНЫХ МАТЕРИАЛОВ НА ОСНОВЕ ГИПСА И ЕЕ СОСТАВ 1Рахимов Ф.Ф., 1Беков У.С., 2Сафарова Р.У. 1Бухарского государственный технический университет, 2Бухарский государственный педагогический институт. Аннотация. В данной работе представлен синтезированное кремнийорганическое соединение полностью нерастворимо в бензоле, толуоле, гексане и воде при концентрации 10% по отношению к объему растворителя, но растворимо в ДМСО, ДМФА, этаноле, пропаноле, н-бутаноле, изопропиловом спирте, ацетоне, диоксане и диэтиловом эфире. Тестовые эксперименты проводились на основе полимеров, взятых от 3% до 10% по отношению к массе гипса. Ключевые слова: полимер, фенолформальдегид, гипс, бензол, толуол, гексан, ДМСО, ДМФА, этанол, пропанол, н-бутанол, изопропиловый спирт, ацетон, диоксан и диэтиловый эфир, гидрофобизатор. GIPS ASOSIDAGI QURILISH MATERIALLARI UCHUN GIDROFOB KOMPOZITSIYA VA UNING TARKIBI 1Raximov F.F., 1Bekov U.S., 2Safarova R.U. 1Buxoro davlat texnika universiteti, 2Buxoro davlat pedagogika instituti. Annotatsiya. Ushbu maqolada erituvchi hajmiga nisbatan 10% konsentratsiyada benzol, toluol, geksan va suvda to‘liq erimaydigan, ammo DMSO, DMF, etanol, propanol, n-butanol, izopropil spirt, aseton, dioksan va dietiloterda eriydigan sintezlangan kremniy organokorik birikmasi keltirilgan. Sinov tajribalari gips massasiga nisbatan 3% dan 10% gacha olingan polimerlar asosida o‘tkazildi. Kalit so‘zlar: polimer, fenolformaldegid, gips, benzol, toluol, geksan, DMSO, DMF, etanol, propanol, nbutanol, izopropil spirt, aseton, dioksan va dietil efir, gidrofobizator. HYDROPHOBIC COMPOSITION FOR GYPSUM-BASED BUILDING MATERIALS AND ITS COMPOSITION 1Raximov F.F., 1Bekov U.S., 2Safarova R.U. 1Bukhara State Technical University, 2Bukhara State Pedagogical Institute. Abstract. In this work, the synthesized organosilicon compound is presented, which is completely insoluble in benzene, toluene, hexane and water at a concentration of 10% relative to the volume of the solvent, but is soluble in DMSO, DMF, ethanol, propanol, n-butanol, isopropyl alcohol, acetone, dioxane and diethyl ether. Test experiments were carried out on the basis of polymers taken from 3% to 10% relative to the mass of gypsum. Keywords: polymer, phenol formaldehyde, gypsum, benzene, toluene, hexane, DMSO, DMF, ethanol, propanol, n-butanol, isopropyl alcohol, acetone, dioxane and diethyl ether, water repellent.water absorption, water repellent, plasticizing polymer. “Развитие науки и технологий” Научно–технический журнал №5/2025 150