Abstract
Results are presented from adsorption and electrochemical investigations of a 3,7,12,17-tetramethyl-8,13-divinyl-2,18-deuteroporphyrin IX (depocolin) salt on a CuNiFe (MNZh) 5-1 alloy. It is established that modifying surfaces of copper and CuNiFe 5-1 alloy with depocolin and the subsequent adsorption of 5-chloro-1,2,3-benzotriazole considerably enhances the protective effect, which is higher than those of each compound taken separately. XPS and reflection ellipsometry reveal the chemisorptive character of interaction between depocolin and the alloy’s surface. It is shown that bonding between the inhibitor and the copper or alloy surface proceeds through carboxyl groups of depocolin, while the porphyrin cycle does not participate in this interaction.
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This work was supported by the Russian Foundation for Basic Research, project no. 20-03-00101.
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Agafonkina, M.O., Grafov, O.Y., Andreeva, N.P. et al. Modifying Copper and Copper Alloy Surface with Depocolin and 5-Chloro-1,2,3-Benzotriazole from a Neutral Aqueous Solution. Russ. J. Phys. Chem. 95, 2295–2303 (2021). https://doi.org/10.1134/S0036024421110029
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DOI: https://doi.org/10.1134/S0036024421110029