About the anti-corrosion properties of biofuel

• A.Yu. Kornev¹, L.E. Tsygankova^1,2, L.G. Knyazeva¹, A.V. Dorokhov¹ and N.A. Kur’yato^1,3

¹ All-Russian Scientific Research Institute of Use of Machinery and Oil Products in Agriculture, Novo-Rubezhnyi per., 28, 392022 Tambov, Russian Federation
² Derzhavin State University, ul. Internatsyonalnaya, 33, 392000 Tambov, Russian Federation
³ Tambov State Technical University, ul. Sovetskaya, 106, 392000 Tambov, Russian Federation

Abstract: The protective efficiency of films of biofuel and diesel fuel on steel St3, as well as their compositions with additions of water up to 20%, was studied by electrochemical and gravimetric methods in a 0.5 M NaCl solution and a thermal moisture chamber. Biofuel obtained from substandard camelina oil according to the technology developed at the Federal State Budgetary Scientific Institution VNIITiN that meets the requirements of GOST R 53605-2009 (EN 14214:2003) was used. Diesel fuel complies with GOST 32511-2013 “Diesel fuel EURO”. Fuel-water compositions are “water-in-oil” emulsions. Biofuel and watered compositions based on it have a greater protective efficiency than diesel fuel and its compositions with water. So, after 40 days of testing in a thermal moisture chamber, the protective efficiency of biofuel and its compositions with water is 99.0–99.4%, and that for diesel fuel and its compositions is 24.7–21.7%. According to the data of 14 days of gravimetric tests in 0.5 M NaCl solution, the protective efficiency of biofuel compositions Z = 80.9–69.9%, that of diesel fuel is 62.2–59.4%. The anti-corrosion advantage of biodiesel compositions is easy to ascertain based on polarization measurements in chloride solution, without resorting to lengthy gravimetric tests.

Keywords: biofuel, diesel fuel, flooding, emulsions, protective properties, carbon steel, chloride solution, polarization curves, thermal moisture chamber

Int. J. Corros. Scale Inhib., 2022, 11, no. 2, 553-563
doi: 10.17675/2305-6894-2022-11-2-6

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