Adsorption and protective properties of substituted sodium malonates on nickel in neutral aqueous solutions
https://doi.org/10.61852/2949-3412-2024-2-4-20-33
Abstract
The adsorption and protective action of sodium malonate and its alkyl derivatives (C2 and C9) on the surface of nickel in a neutral buffer solution was studied. Adsorption isotherms of malonate and its alkylderivatives on the oxidized surface of nickel were obtained and the values of free energy of adsorption 0 -DGa were determined, which lie in the range from 51 to 79 kJ/mol. The dependence of the protective effect on the hydrophobicity of alkylmalonates was revealed. The higher the hydrophobicity of the compound, the higher the protective effect. A composition of sodium malonate and laurate in a ratio of 4:1 has been developed, which has a higher protective effect than sodium malonate and laurate alone.
About the Authors
M. O. Agafonkina
Институт физической химии и электрохимии им. А.Н. Фрумкина Российской академии наук (ИФХЭ РАН)
Russian Federation
Russian Federation
N. P. Andreeva
Институт физической химии и электрохимии им. А.Н. Фрумкина Российской академии наук (ИФХЭ РАН)
Russian Federation
Russian Federation
Yu. I. Kuznetsov
Институт физической химии и электрохимии им. А.Н. Фрумкина Российской академии наук (ИФХЭ РАН)
Russian Federation
Russian Federation
Kh. S. Shikhaliev
ФГБОУ ВО «ВГУ» Воронежский государственный университет
Russian Federation
Russian Federation
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For citations:
Agafonkina M.O., Andreeva N.P., Kuznetsov Yu.I., Shikhaliev Kh.S. Adsorption and protective properties of substituted sodium malonates on nickel in neutral aqueous solutions. Title in english. 2024;(4):20-33. (In Russ.) https://doi.org/10.61852/2949-3412-2024-2-4-20-33
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