CC BY
8
№ 3 (120)
март, 2024 г.
SYNTHESIS OF CORROSION INHIBITOR BASED ON POLYMETHYL METHACRYLATE
Ilkhom Choriev
Main teacher Termez State University, Republic of Uzbekistan, Termez E-mail: [email protected]
Khait Turaev
Doctor of chemical sciences, professor Termez State University Republic of Uzbekistan, Termez
Bakhtior Normuradov
Doctor of technical sciences, professor Termez State University Republic of Uzbekistan, Termez
СИНТЕЗ ИНГИБИТОРА КОРРОЗИИ НА ОСНОВЕ ПОЛИМЕТИЛМЕТАКРИЛАТА
Чориев Ильхом Кенжаевич
гл. преподаватель Термезский государственный университет Республика Узбекистан, г. Термез
Тураев Хаит Худайназарович
д-р хим. наук, профессор Термезский государственный университет, Республика Узбекистан, г. Термез
Нормурадов Бахтиор Абдуллаевич
д-р хим. наук, профессор Термезский государственный иверситет Республика Узбекистан, г. Термез
ABSTRACT
The newly composite corrosion inhibitors have been synthesized from monoethanolamine, methyl methacrylate and phosphoric acid and their inhibition efficiency were studied. In this case, the mole ratio of the initial substances was maintained 1:2:2 respectively and the temperature was also remained between 35 0C and 40 0C, and 48 hour time duration has also been followed.
АННОТАЦИЯ
Синтезированы новые композиционные ингибиторы коррозии на основе моноэтаноламина, метилметакрилата и фосфорной кислоты и исследована их ингибирующая эффективность. В этом случае мольное соотношение исходных веществ поддерживали 1:2:2 соответственно, а температуру также поддерживали в пределах от 35°С до 40°С, а также выдерживали 48-часовую продолжительность.
Keywords: corrosion inhibitor, monoethanolamine, methyl methacrylate, phosphoric acid.
Ключевые слова: ингибитор коррозии, моноэтаноламин, метилметакрилат, фосфорная кислота.
Introduction
Corrosion is a reversible process, which converts pure metal to different chemical compounds [1]. Nowadays, corrosion is turning into a major issue in many industries, building materials, infrastructure, tools, ships, trains, vehicles, machines, and appliances [2]. Carbon steel experiences extensive corrosion during the cleansing process with acids. The NACE 2016 reported that across
the world about 2.5 trillion U.S. dollars economic fall due to corrosion and Every year 10% of metal is lost due to corrosion which severely affects the country's economy [3]. Corrosion is not only responsible for an economic loss but also related with safety issues because it decreases the shelf life of steel [4]. It has already been recognized as a major issue for the entire world, so researchers are trying to protect the corrosion process
Библиографическое описание: Choriev I.K., Turaev H., Normuradov B.A. SYNTHESIS OF CORROSION INHIBITOR BASED ON POLYMETHYL METHACRYLATE // Universum: технические науки : электрон. научн. журн. 2024. 3(120). URL: https://7universum.com/ru/tech/archive/item/17136
№ 3 (120)
март, 2024
in various ways [5]. Mostly inhibitor is typically used to protect metal from corrosion and environmental friendly inhibitors have wide application in corrosion fields and it is generally added in the metal as a low concentration [6]. We believe this study is a small initiative to find a suitable corrosion inhibitor which can able to protect materials form corrosion process. According to this study, a corrosion inhibitors were prepared based on poly (methyl methacrylate-maleic anhydride) P (MMA-MAH )s accompanied with different percentage of methyl methacrylate and maleic anhydride and the inhibitory potentiality of this inhibitor has checked on simple carbon steel in a 0.5 M HCl [7-10].
2. Material and Methods
2.1. Materials: To synthesize this composite corrosion inhibitor, monoethanolamine and methyl methacrylate monomers (purified by driving in inert nitrogen atmosphere) and phosphoric acid, such as 1 M HCl for aggressive environments, were used. Steel composition: Fe 97.755-97.215%, C 0.17-0.24%, Si 0.17-0.37, Mn 0.35-0.65%, Ni 0.3%, S 0.04 %, P 0.035 %, Cr 0.25 %, Cu 0.3 %, As 0.08 %. 2x2.5 cm2 samples of steel with
this composition were taken, the surface was cleaned with sandpapers, washed several times in acetone and dried.
2.2. Methods: Analytical results are obtained using different types of analytical instruments which are mentioned with specification in below: Infrared Spectroscopic (IR) technique - IR Spectra, Specially synthesized Corrosion Inhibitors are checked by "IRTracer-100" (SHIMADZU CORP., Japan, 2017).
Experimental part
Synthesis of MMF-1 corrosion inhibitor. MMF-1 composite corrosion inhibitor was prepared from 1 mol of methyl methacrylate (102 g) and 2 mol (122 g) of monoethanolamine, were placed a 250 cm3 round-bottomed flask and refluxed in a furnace equipped with a magnetic stirrer at a temperature between 35 0C and 40 0C within 48 hours duration. The product was pumped out using a hermetically sealed device at a pressure of 0.8 Pa. Later, it was mixed with 2 mol (196 g) of phosphoric acid for 1.5 hours until a homogeneous mass was formed.
Figure 1. The synthetic route used in the preparation of inhibitor MMF-1
3. Results and Discussion 3.2. IR-analysis
IR spectra of the obtained inhibitor was run and found several peaks at particular region for individual functional groups. According to the results, it has revealed that the valence vibrations of the -C-H bond in the methyl (-CH3) group was observed at 2939,52 cm-1 and the -C-H bond in the methylene (-CH2-) group got at 2866.22 cm-1. In addition, that - N-H bonds was
observed in the area of 3356.14 cm-1. Moreover, the -OH and -O-CH3 groups peaks have found at 3290.56 and of 1653.0 cm-1 respectively.
Analysis of results of *HNMR and 13CNMR analysis
The 1HNMR and 13CNMR graphs are included in Figure 2 and Figure 3 respectively. The 1HNMR and 13CNMR analysis of obtained inhibitor were carried out and discussion of the results are included in the paper clearly.
№ 3 (120)
март 2024 r
Figure 2.1H NMR spectrum of the synthesized corrosion inhibitor compound
Figure 3.13C NMR spectrum of the synthesized corrosion inhibitor
According to 1H NMR graph it is evident that two CH2 groups bonded with O and also N have exhibited peaks at 3.804 ppm and 3.6ppm respectively. In addition, that other CH2 and CH3 group peaks are firmly observed below at 1.5ppm. Moreover, another major NH peak
of compound did not appear in the scale, most probably the NH protons could able to exchange with deuterium, and peak might be diminish, or disappear [Anthony Foris, On NH NMR Chemical Shifts part 1, For further confirmation of the compound we have run 13C NMR
№ 3 (120)
spectrum of our obtained inhibitor. In the 13C NMR, quaternary carbon that was bonded to the NH group has shown peak at 177.37 ppm and the carbon of the CH2 group bonded to the NH group (C- 6) exhibited peak at - 39.6 ppm. Furthermore, carbon peak of CH2 group which bonded with O and another CH2 group has also found at - 61.58 ppm and another quaternary carbon bonded with methylene group and also CH3 group has shown peak at -43. 7 ppm.
март, 2024 г.
Conclusion
The MMF-1 corrosion inhibitor based on methyl methacrylate, monoethanolamine, and phosphoric acid was obtained with a yield of 87% and its structure was firmly established by IR-analysis, 1HNMR, and 13CNMR spectroscopic techniques.
References:
1. Chigondo, M.; Chigondo, F.: Recent natural corrosion inhibitors for carbon steel: an overview. J. Chem. 2016. https://doi.org/10.1155/2016/6208937
2. Muthukrishnan, P.; Jeyaprabha, B.; Prakash, P.: Carbon steel corrosion inhibition by aqueous extract of Hyptis Suaveolens leaves. Int. J. Ind. Chem. 2014. https://doi.org/10.1007/s40090-014-0005-9.
3. Kaur, J., Daksh, N. & Saxena, A. Corrosion Inhibition Applications of Natural and Eco-Friendly Corrosion Inhibitors on Steel in the Acidic Environment: An Overview. Arab J Sci Eng. 2022, 47, pp. 57-74. https://doi.org/10.1007/s13369-021-05699-0.
4. Kouache A., Khelifa A, Boutoumi H, Moulay S, Feghoul A, Idir B, Aoudj S. Experimental and theoretical studies of Inula viscosa extract as a novel eco-friendly corrosion inhibitor for carbon steel in 1 M HCl. J Aches Sci Technol. 2021, https://doi.org/10.1080/01694243.2021.195621
5. Lu, G., Li, YM., Lu, CH. et al. Corrosion protection of iron surface modified by poly (methyl methacrylate) using surface-initiated atom transfer radical polymerization (SI-ATRP). Colloid Polym Sci. 2010, 288, pp. 1445-1455. https://doi.org/10.1007/s00396-010-2283-x.
6. Nurilloev Z., Beknazarov Kh., Nomozov A. Production of corrosion inhibitors based on crotonaldehyde and their inhibitory properties. International Journal of Engineering Trends and Technology. 2021, 70, pp. 423-434. https://doi.org/10.14445/22315381/IJETT-V70I8P243.
7. Nomozov A.K., et all. Studying of Properties of Bitumen Modified based on Secondary Polymer Wastes Containing Zinc. International Journal of Engineering Trends and Technology. ISSN: 2231-5381 / https://doi.org/10.14445/22315381/IJETT-V71I9P222.
8. Nomozov A.K., et all. Study of processes of obtaining monopotassium phosphate based on monosodium phosphate and potassium chloride. Chemical Problems. 2023 no. 3 (21). DOI: 10.32737/2221-8688-2023-3-279-293.
9. Nurilloev Z., Beknazarov Kh., and Nomozov A., "Production of Corrosion Inhibitors Based on Crotonaldehyde and Their Inhibitory Properties," International Journal of Engineering Trends and Technology., 2022, vol. 70, 8, pp. 423-434, Crossruff, https://doi.org/10.14445/22315381/IJETT-V70I8P243.
10. Nomozov A.K., et. all. Salsola Oppositifolia acid extract as a green corrosion inhibitor for carbon steel. Indian Journal of Chemical Technology. 2023, 30, pp. 872-877. https://doi.org/10.56042/ijct.v30i6.6553.
