Effect of the ratio of octadecylamine and 1,2,3-benzotriazole on the protective properties of their mixture during chamber treatment of steel. Separate addition of the components

• A.V. Karaulova¹, A.Yu. Luchkin¹, O.A. Goncharova¹, N.N. Andreev¹, S.S. Vesely¹, T.A. Vagramyan², D.Q. Zhang³, Z.L. Xin³ and J. Li³

¹ A.N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky pr. 31, 119071 Moscow, Russian Federation
² Mendeleev University of Chemical Technology, Russia, Moscow, Miusskaya sq., 9, 125047 Moscow, Russian Federation
³ Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power, Shanghai 201306, China

Abstract: In this work, the chamber protection of carbon steel by octadecylamine, 1,2,3-benzotriazole and binary inhibitors based on these compounds has been studied by corrosion and electrochemical methods. It has been shown that the antagonism of the protective action of octadecylamine and 1,2,3-benzotriazole added to the chamber as a homogenized mixture is mainly due to interaction of the components in the suspension of inhibitors. From the standpoint of practical use, separate addition of octadecylamine and 1,2,3-benzotriazole to the chamber is better than the application of their homogenized mixture. Equal weight amounts of octadecylamine and 1,2,3-benzotriazole to the chamber is the optimal composition for the protection of carbon steel. The binary inhibitor has a blocking mechanism of action. At the same time, the protective effect of the chamber inhibitors studied is associated with stabilization of the passive state of steel.

Keywords: atmospheric corrosion, carbon steel, chamber inhibitor, octadecylamine, benzotriazole, voltammetry, electrochemical impedance spectroscopy

Int. J. Corros. Scale Inhib., 2025, 14, no. 1, 246-255
doi: 10.17675/2305-6894-2025-14-1-15

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