Protective and passivating properties of anti-rust additives on low-carbon steel St3 in a neutral chloride solution
https://doi.org/10.61852/2949-3412-2025-3-1-85-96
Abstract
The passivation and protective properties of anti-rust additives KAP-25 and V-15/41 on lowcarbon steel St3 in chloride aqueous and borate-buffer solutions were studied. Both additives are capable of spontaneously passivating the steel electrode and improving the local depassivation potential of St3 in a borate buffer solution with the addition of 0.01 M NaCl. The highest passivation properties are possessed by V-15/41, which at 8 mmol/L has a protective effect of 0.22 V. The compositions of the studied additives with 2-MBT (9:1) have higher protective effects on low-carbon steel than the individual substances themselves. In 0.01 M chloride solutions at 7 mmol/L V-15/41+2-MBT (9:1) St3 is completely protected from corrosion destruction for 7 days. For complete protection of steel with the composition KAP-25+2-MBT (9:1) 8 mmol/L in 0.01 M NaCl solution is required.
About the Authors
N. P. Andreeva
Институт физической химии и электрохимии им. А.Н. Фрумкина Российской академии наук (ИФХЭ РАН)
Russian Federation
Russian Federation
M. O. Agafonkina
Институт физической химии и электрохимии им. А.Н. Фрумкина Российской академии наук (ИФХЭ РАН)
Russian Federation
Russian Federation
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Review
For citations:
Andreeva N.P., Agafonkina M.O. Protective and passivating properties of anti-rust additives on low-carbon steel St3 in a neutral chloride solution. Title in english. 2025;(1):85-96. (In Russ.) https://doi.org/10.61852/2949-3412-2025-3-1-85-96
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