Topilnytskyy, P., Tkachuk, V., & Rechun, О.
(2022).
Influence of organic chlorin compounds in oil on corrosion of oil transport equipment.
Commodity Bulletin,
15(1),
286-297.
https://doi.org/10.36910/6775-2310-5283-2022-15-25
ISSN 2310-5283
e-ISSN 3041-1432
UDC 67; 68; 33
Influence of organic chlorin compounds in oil on corrosion of oil transport equipment
Received 21.09.2021, Revised 23.12.2021, Accepted 18.02.2022
Abstract
Goal. Estimation of influence of organochlorine impurities on corrosion of oil transportation equipment.Results. The corrosion effect of chloroform, dichloromethane, methylene chloride, trichlorethylene and perchlorethylene on metal plates at the concentration of VOC in the environment from 10 to 1000 ppm at a temperature of 20 ° C was studied. The basic environment for research was commercial diesel fuel with the addition of certain VOCs or oil with high VOC content. Metal samples - steel St 20, metal from the pipeline, tank, metal pipe from Czech steel. Among the studied VOCs, the most corrosive compounds were found - dichloroethane, methylene chloride and trichlorethylene.A mixture of the most corrosive VOCs was added to commercial diesel fuel in the amount of 500 ppm and the corrosive effect on the metal of main oil pipelines, tanks and process equipment was determined. It was found that the obtained corrosive environment at 30 ºC causes a low corrosion rate, while the studied metal plates from the pipeline, tank and pipeline made of Czech steel showed resistance to aggressive environments at the level of "stable", and corrosive activity of aggressive environments was assessed as "medium".Increasing the temperature of the experiments to 40 ºC had little effect on the corrosion rate under the action of VOCs.The effect of oil with a content of VOC 438 ppm, which was introduced into the diesel fuel in the amount of 30%, on the base metal of the main oil pipelines was determined. Metal plates from the pipeline, tank, Czech steel pipeline showed resistance to the aggressive environment at the level of "stable", and the corrosion activity of the aggressive environment was assessed as "average".Assessing the corrosive effect of organochlorine compounds on the nature and rate of corrosion of main oil pipelines, tanks and process equipment, it can be stated that the VOC content in oil up to 500 ppm at temperatures up to 40 ° C has little corrosive effect, and the metal of main oil pipelines, tanks and process equipment exhibits corrosion resistance at the level of "stable" on the scale of assessment of corrosion resistance of the metal in accordance with GOST 9.502-82 (corrosion rate can be up to 0.1 mm / year).Scientific novelty. At present, refineries do not have the technology to neutralize organochlorine compounds or reliably protect equipment. The same research is relevant. Some experience in the fight against chlorine refineries has already been obtained, but, in our opinion, none of the proposed developments is yet effective enough.Practical importance. Organochlorine compounds are a source of hydrogen chloride corrosion of transport system equipment. Their presence in oil is potentially dangerous for refineries, and they are detected only in the process of cleaning process equipment, pipelines and tanks. Their neutralization is an important practical task in oil transportation.
Keywords:
oil refining equipment; pipelines; organochlorine compounds; corrosion
Suggested citation
797 Views
References
[1] Hutorianskiy, F.M. (2002). Organochlorine compounds in oil. World of oil products. Bulletin of Oil Companies, 3, 6-7.
[2] Hutorianskiy, F.M. (2002). Organochlorine compounds. Fractional separation and methods of removal from oil at the stage of its preparation and processing. World of oil products. Bulletin of Oil Companies, 4, 9-13.
[3] Levchenko, D.N. (1991). The need to remove corrosive salts from oil. Chemistry and Technology of Fuels and Oils, 6, 43-44.
[4] Varshavskyi, O.M. (2003). KhOS. How to solve the problem at OOO PO "Kyryshynefteorhsyntez". Oil producers. Foreign Oil Companies, 2, 16-18.
[5] Azarova, S.N. (2002). We treat wells – we cripple refineries. The problem of - chlorine‖ remains relevant. Oil and Gas Vertical, 8, 14-16.
[6] Uusitalo, M.A. (2002). Elevated temperature erosion-corrosion of thermal sprayed coatings in chlorine containing environments. Wear, 252, 586-594
[7] Khutorianskyi, F.M., Orlov, L.N., Mykhalev, A.H., Uryvskaia, H.M, Erhyna, E.V., Krainov, L.A., & Tsvetkov, A.L. (2001). Modern reagents for chemical-technological corrosion protection of condensate-cold equipment of primary processing plants. Bulletin of Oil Companies, 1, 13-19.
[8] Pozdnyshev, H.N. (2002). On the problem of reducing hydrochloric acid corrosion, salt deposition and the content of chemical compounds in oil refining products at oil refineries. Interval, 1, 79-81.
[9] Zakharochkyn, L.D., Volfson, S.Y., & Klochkova, L.H. (1959). Chemical and technological methods of combating low-temperature corrosion AVT. Chemistry and Technology of Fuels and Oils, 3, 46-52.
[10] Sukhotyn, A.M. (1974). Corrosion and protection of chemical equipment. Reference guide.
[11] Rozenfeld, Y.L. (1977). Corrosion inhibitor. M.: Khymyia.
[12] Khutorianskyi, F.M. (2007). Integrated chemical-technical protection system against corrosion of condensation-cold equipment for atmospheric columns of installations of primary oil refineries. Development and implementation. Report on the scientific seminar "Actual problems of oil refinery" at the Russian University of Oil and Gas. Y.M. Hubkyna The World of Oil Products: Bulletin of Oil Companies, 1, 45-48.
[13] Romanchuk, V.V. (2013). Anti-corrosion protection of oil refinery equipment with nitrogen- and oxygen-containing inhibitors. (Abstract, Lviv National Polytechnic University, Lviv, Ukraone).
[14] Romanchuk, P. (2010). Investigation of reagents with different chemical compositions for protection of oil primary refining equipment. Chemistry & Chemical Technology, 4(3), 231-236.
[15] Motor fuels: Properties and quality. Kyiv: Centr uchbovoyi literatury.
[16] Topilnyczkyj, P.I., Grynyshyn, O.B., & Machynskyj, O.Ya. (2014). Primary oil and gas processing technology. Lviv: Publishing House of Lviv Polytechnic.
[17] Pichugin, V.F., Ivanova, L.V., & Burov, E.A. (2013). Improving tribological characteristics of metallic pairs in diesel fuel with the introduction of additives. Chemistry and Technology of Fuels and Oils, 4(578), 20-22.