Alkoxysilanes as chamber inhibitors of copper corrosion

• A.A. Shishkin^1,2, A.Yu. Luchkin¹, O.A. Goncharova¹, O.S. Makarova¹, N.N. Andreev¹, S.S. Vesely¹, T.A. Vagramyan² and D.Q. Zhang³

¹ Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, 31-4, Leninsky prospect, 119071 Moscow, Russia
² Mendeleev University of Chemical Technology of Russia, 9 Miusskaya Sq., 125047 Moscow, Russia
³ Shanghai Key Laboratory of Materials Protection and Advanced Materials in Electric Power, Shanghai University of Electric Power, Shanghai 201306, China

Abstract: The possibility of corrosion protection of copper by chamber treatment with alkoxysilanes such as ethyltrimethoxysilane, octyltrimethoxysilane, aminoethylaminopropyltriethoxysilane, and vinyltrimethoxysilane was studied. Corrosion tests in neutral salt spray, voltammetric studies, electrochemical impedance spectroscopy, and ellipsometry were used in the studies. Vinyltrimethoxysilane appeared to be the most efficient chamber inhibitor of copper corrosion among the compounds studied. Adsorption of vinyltrimethoxysilane on copper may be accompanied by polymerization. During the chamber treatment of copper, vinyltrimethoxysilane forms polymolecular adsorption layers that block the metal surface and stabilize the passive state of the metal.

Keywords: copper, corrosion resistance, chamber treatment, silanes, voltammetry, electrochemical impedance spectroscopy, ellipsometry

Int. J. Corros. Scale Inhib., 2025, 14, no. 4, 2508-2519
doi: 10.17675/2305-6894-2025-14-4-43

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