RESEARCH AND SELECTION OF CORROSION-RESISTANT STRUCTURAL MATERIALS FOR AGGRESSIVE ENVIRONMENTS APROTIC SOLVENTS
Array
Keywords:
corrosion activity, corrosion rate, corrosion cracking, benzole alkylation, absorption oil, alloy steels, high-nickel alloys, aprotic solvents.Abstract
The article presents the results of studies of the corrosive activity of aggressive media of an aprotic nature of technological processes for capturing aromatic hydrocarbons from coke oven gas, crude benzene washing up from sulfuric compounds with concentrated sulfuric acid, and the benzene alkylation process (Friedel-Crafts reaction). Based on a complex of corrosion and metallographic studies and examination of the operating equipment of aprotic solvent alkylation plants, it was shown that when using an aluminum chloride alkylation catalyst in these processes, EP-814 A-VI (V-2) alloys possess high corrosion resistance along with nickel-molybdenum alloy 760, welded joints of the indicated alloys made using the EP-760 welding wire. It was established that the working hot coal-tar wash oils are highly corrosive, especially dangerous manifestation of stress corrosion cracking for alloyed steels used in modern spiral heat exchangers. It is shown that the contamination of coal-tar wash oils can be estimated, along with chemical analysis, using breakdown voltage values according to GOST 6581-75. Gravimetric corrosion tests show that the most resistant steels in these media are 08Х18Н10T (AISI 304) and steel containing 10Х17Н13M2T (AISI 316) molybdenum, while SMO-254 is used for plate and spiral heat exchangers. It is shown that the use of concentrated sulfuric acid in a catalyst for the alkylation and purification of crude benzene for the manufacture of equipment, the use of alloys ХН65МВ, ХН65МВУ, С-276 was required.
References
Osipov, A.N., Burkhanov, A.M., Pristupa, A.N., and Suvorov, A.N. (2006) The operation of spiral heat exchangers in the shop for capturing of chemical coking products. Koks Khim., 12, 34–38.
Kagasov, V.M., Derbysheva, E.K., Kopytova, L.A., et al. (1989) Research and development of technology of formaldehyde cyano-purification of circulating water of the cycle of final cooling of coke furnace gas. Koks Khim., 9, 23–24
Beloshapka, I.V., Zorya, S.I., Mukina, N.V., et al. (2009) The operation of a closed cycle of final cooling of coke furnace gas at the Arcelor Mittal Kryvyi Rih. Coal Chemical Journal, 5-6, 55-59.
Lazorin, S.N. and Stetsenko, E.Y. (1969) Crude benzene production (Production of Crude Benzene), Kiev: Tekhnika.
Rubchevsky, V.N., Chernyshov, Yu.A., Zelensky, V.V., Savenyuk, A.I., Nesterenko, S.V. (2013) Investigation of the corrosion resistance of nickel-based alloys as a structural material for the process of sulfuric acid purification of crude benzene. Coal Chemical Journal, 3, 41-46.
Retrieved from https//chemipedia.info
Downloads
Published
How to Cite
Issue
Section
License
The authors who publish in this collection agree with the following terms:
• The authors reserve the right to authorship of their work and give the magazine the right to first publish this work under the terms of license CC BY-NC-ND 4.0 (with the Designation of Authorship - Non-Commercial - Without Derivatives 4.0 International), which allows others to freely distribute the published work with a mandatory reference to the authors of the original work and the first publication of the work in this magazine.
• Authors have the right to make independent extra-exclusive work agreements in the form in which they were published by this magazine (for example, posting work in an electronic repository of an institution or publishing as part of a monograph), provided that the link to the first publication of the work in this journal is maintained. .
• Journal policy allows and encourages the publication of manuscripts on the Internet (for example, in institutions' repositories or on personal websites), both before the publication of this manuscript and during its editorial work, as it contributes to the emergence of productive scientific discussion and positively affects the efficiency and dynamics of the citation of the published work (see The Effect of Open Access).
