Inhibitor protection of brass in acetic acid solutions
https://doi.org/10.61852/2949-3412-2025-3-1-121-136
Abstract
The kinetics of corrosion of brass LK62-0.5 in freely aerated solutions of acetic acid (0.25−8.0 M), as well as the effect of the convective factor of the environment and the addition of a corrosion inhibitor, catamine AB, on this process were studied. The presence of a corrosion product, Cu(II) cations, has an accelerating effect on brass corrosion in the studied environments, including solutions containing catamine AB. The dependence of the brass corrosion rate on the convective factor in freely aerated acid solutions and acid solutions containing Cu(II) cations is formally described by an equation of the form k = a+b·n1/2, where a and b are empirical parameters, n is the rotation frequency of the propeller magnetic stirrer stirring the solution. In acetic acid solutions, including stirred environments containing Cu(II) cations, the brass corrosion rate does not exceed 0.91 g/(m2·h). In the same environments containing the additive catamine AB, the corrosion rate of brass does not exceed 0.14 g/(m2·h). Considering the low corrosion rate of brass in inhibited acidic environments, the obtained result is of practical interest.
About the Authors
Ya. G. Avdeev
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry Russian Academy of Sciences
Russian Federation
Russian Federation
31-4, Leninsky prospect, 119071 Moscow
K. L. Anfilov
Federal State Autonomous Educational Institution of Higher Education «Bauman Moscow State Technical University»
Russian Federation
Russian Federation
Basmanniy municipal district, 2-ya Baumanskaya Street, 5-1, 105005 Moscow
T. E. Andreeva
A.N. Frumkin Institute of Physical Chemistry and Electrochemistry Russian Academy of Sciences
Russian Federation
Russian Federation
31-4, Leninsky prospect, 119071 Moscow
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For citations:
Avdeev Ya.G., Anfilov K.L., Andreeva T.E. Inhibitor protection of brass in acetic acid solutions. Title in english. 2025;(1):121-136. (In Russ.) https://doi.org/10.61852/2949-3412-2025-3-1-121-136
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